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human papillomavirus type 29 (hpv-29), an hpv type cross-hybridizing with hpv-2 and with hpv-3-related types.the cloning and partial characterization of human papillomavirus (hpv) type 29 is presented. by hybridization analyses, this virus appears to be related to hpv types associated with common warts and hpv types associated with flat warts.19892552165
detection of herpes simplex virus dna in a cutaneous squamous cell carcinoma by in situ hybridization.a case of a cutaneous squamous cell carcinoma (scc) occurring at the site of a long-standing recurrent hsv infection is described. no deficit of the cell-mediated immunity was recorded. hsv2 was isolated in several viral cultures. hsv dna was visualized in the scc by in situ hybridization with biotinylated probes in paraffin-embedded tissue. the samples were negative for hpv2, 5, 16, and 18 probes. a causal relationship between hsv infection and cutaneous scc is hypothesized.19892552936
inhibition of translation in cells infected with a poliovirus 2apro mutant correlates with phosphorylation of the alpha subunit of eucaryotic initiation factor 2.a poliovirus type 2 lansing mutant was constructed by inserting 6 base pairs into the 2apro region of an infectious cdna clone, resulting in the addition of a leucine and threonine into the polypeptide sequence. the resulting small-plaque mutant, 2a-2, had a reduced viral yield in hela cells and synthesized viral proteins inefficiently. infection with the mutant did not lead to specific inhibition of host cell protein synthesis early in infection, and this defect was attributed to a failure to i ...19892555543
novel variants of human papillomavirus type 2 in warts from immunocompromised individuals.twenty cutaneous warts from i8 renal transplant recipients (rtr) and a single wart sample from a patient suffering from hodgkin's disease were screened for the presence of human papillomavirus (hpv) sequences by southern blot analysis. thirteen samples were shown to contain hpv dna sequences, one was identified as hpv-3, two as hpv-4, six as hpv-2 and four were unidentifiable by restriction digest analysis. hpv-3 was identified in the wart sample from the patient suffering from hodgkin's disease ...19892557072
[isolation of recombinant vaccine strains of poliovirus from patients with poliomyelitis].oligonucleotide maps of some poliovirus type 2 strains isolated from polio cases, while being clearly related to that of the sabin vaccine type 2 strain, exhibited, nevertheless, marked differences from the reference (vaccine) map. several large oligonucleotides derived from 4 such strains were subjected to enzymatic sequencing. the results strongly suggest that all of them were intertypic recombinants between the sabin strains. the 5'-parts of the genomes of these strains were derived from the ...19892560812
a human-human hybridoma which produces antibodies to polioviruses.a human-human hybridoma which produced antibodies to sabin strain poliovirus types 3 and 2 was established. this hybridoma was constructed by fusing a hat-sensitive variant of a human lymphoblastoid subline r4-4-6 with peripheral blood lymphocytes of a donor who had been previously immunized with poliovirus sabin vaccines and had shown high titer of neutralizing antibodies against these viruses. this hybridoma had been cultured for more than one year and the neutralizing activities of the cultur ...19892561573
warts in fish handlers.fish handlers frequently suffer from hand warts. the clinical form and hpv type in these lesions were studied. eleven individuals (10 fishmongers and one fisherman) with multiple hand warts were examined clinically and samples from their warts examined by southern blot and reverse blot analysis. clinically, with one exception, the warts were of the common type. hpv dna was detected in all but one individual. hpv4 was found in one sample, hpv1 related virus in three, a virus hybridizing with both ...19892540791
notes on the pathogenesis of enterovirus infections. observations, experiments, and speculations.despite extensive investigations over the last decades, several aspects of the pathogenesis of enterovirus infections in humans and animals are only poorly understood, such as the molecular basis of virulence (in particular of neurovirulence), tissue tropisms (e.g. the precise site of initial virus replication in the human intestinal tract), and precipitating factors of paralytic disease ("disposition"). studies on poliovirus myocarditis in man are reviewed. unequivocal evidence on replication o ...19901965548
localization of genomic regions specific for the attenuated, mouse-adapted poliovirus type 2 strain w-2.in order to begin to elucidate the genomic basis of the attenuation of mouse-adapted, poliovirus type 2 strain w-2 (pv2/w-2), we have cloned and sequenced the virus and compared it with the virulent, mouse-adapted pv2/lansing strain. in addition, we have performed computer-generated comparisons of pv2/w-2 to the non-mouse-adapted, attenuated pv2/sabin strain to determine whether mutational patterns occur that result in attenuation. the pv2/w-2 genome is 7434 nucleotides in length, which is three ...19902154539
antibodies to polioviruses in an israeli population and overseas volunteers.a seroepidemiological survey of prevalence of antibodies to poliovirus types 1-3 was carried out in 1,800 residents of 30 agricultural settlements (kibbutzim) in israel during 1980 and 1981. the survey showed that in 1980 84%, 90%, and 79% of the kibbutz residents exhibited antibodies to poliovirus types 1-3, respectively. in 1981 the figures were 81%, 91%, and 73%. significantly lower levels of antibodies for poliovirus type 3 in 1980/1981, and for poliovirus type 1 in 1981, were noticed in the ...19902154545
presence and type specificity of papillomavirus antibodies demonstrable by immunoelectron microscopy tests in samples from patients with warts.sera from 75 patients with warts were tested for antibodies against human papillomaviruses (hpvs) in an immunoelectron microscopy test. a group of 40 patients' sera were tested against a pooled suspension of the hpvs extracted from their warts and 90% of the sera were found to be antibody-positive. prior to serological investigation viruses from a second group of 35 patients were typed by dot blot hybridization with hpv-1 and hpv-2 dna. according to these results the patients were divided into t ...19902155296
electronmicroscopic demonstration of hpv in oral warts.human papilloma virus (hpv) has been demonstrated in a series of benign proliferative lesions of the skin and the mucosae. the virus has also been found in verrucous laryngeal carcinoma and carcinomas of the oral cavity and other organs. dna hybridization techniques have classified, the hpv into 51 types, some of which seem to be associated with specific lesions. in order to study the intracellular distribution of hpv, we performed ultrastructural analysis with the electron microscope on 14 spec ...19902155374
activities and mechanisms of action of halogen-substituted flavanoids against poliovirus type 2 infection in vitro.the effects of some halogen-substituted flavanoids (dichloroflavan, halogenated isoflavans, and isoflavenes) on poliovirus type 2 infection was examined. only two isoflavenes exhibited a significant inhibitory activity on the virus-induced cytopathic effect and plaque formation. in a single cycle of viral replication, both compounds reduced the viral yield by approximately 90%. the presence of the isoflavenes from the beginning of infection or during the adsorption period only prevented the shut ...19902159258
human papillomavirus infection and filaggrin expression in paraffin-embedded biopsy specimens of extragenital bowen's disease and genital bowenoid papulosis.cutaneous bowen's disease (bd) and genital bowenoid papulosis (bp) are considered as precancerous or cancerous lesions that are sometimes infected with human papillomavirus (hpv). we studied retrospectively paraffin-embedded sections of 11 samples of cutaneous bd and 6 samples of genital bp from the general population for hpv infection and filaggrin expression. using in situ hybridization with biotinylated probes of hpv types 1, 2, 5, 6, 11, 16, and 18, under stringent and/or non-stringent condi ...19902164515
[eruptive viral warts of the burn area].eruptive viral warts were observed in a second-to-third degree burn area in a 68-year-old woman; the warts healed spontaneously and completely after approximately 3 weeks. hpv-2-related dna was demonstrated by southern blot analysis.19902166009
a new antigenic site of poliovirus recognized by an intertypic cross-neutralizing monoclonal antibody.a monoclonal antibody (mab 7j6) neutralizing poliovirus type 2 (pv2) and poliovirus type 1 (pv1) was obtained after immunization of balb/c mice with infectious pv2, strain mef-1. preincubation of mab 7j6 with pv1 inhibited its binding to pv2 and vice versa. neutralization-resistant variants of pv2 and pv1 were selected. nucleotide sequencing of the rnas of some variants revealed mutations in the loop of amino acid residues 239 to 245 in vp2 and in the loop of amino acid residues 195 to 207 in vp ...19902171198
severe intractable common warts associated with human papillomavirus 2, 3 and 20.a 26-year-old male had had numerous common warts on the feet and hands since childhood. they had repeatedly undergone etretinate cryosurgery, always responding well to it. however, the warts reappeared. human papillomavirus (hpv) 2, 3 and 20 were detected in the warts using southern's blot hybridization technique with hpv dna. histologically, the warts showed swollen, clear keratinocytes with vacuolated degeneration not found in common warts. the findings are presented in this paper.19902173668
a general primer pair for amplification and detection of genital human papillomavirus types.a general primer pair localized in the e7 and e1 regions was identified and used for the detection of genital human papillomaviruses (hpvs). the genital hpv types 6b, 11, 16, 18, 31 and 33 were amplified and detected by the polymerase chain reaction (pcr) performed at a high stringency annealing temperature (60 degrees c). hpv-2, -3, -7, -13 and -30 were amplified only at lower temperatures. twelve biopsies from women with invasive cancer in the cervix were analysed with the general primer pair. ...19911650785
structural and functional analysis of the ribosome landing pad of poliovirus type 2: in vivo translation studies.the naturally uncapped genomic and mrnas of poliovirus initiate translation by an internal ribosome-binding mechanism. the mrna 5' untranslated region (utr) of poliovirus is approximately 750 nucleotides in length and has seven to eight (depending on the serotype) aug codons upstream of the initiator aug. the sequence required for internal ribosome binding has been termed the ribosome landing pad (rlp). to better understand the mechanisms of internal initiation, we have determined the boundaries ...19911656077
in vitro mutational analysis of cis-acting rna translational elements within the poliovirus type 2 5' untranslated region.initiation of translation on poliovirus rna occurs by internal binding of ribosomes to a region within the 5' untranslated region (utr) of the mrna. this region has been previously roughly mapped between nucleotides 140 and 631 of the 5' utr and termed the ribosome landing pad. to identify cis-acting elements in the 5' utr of poliovirus type 2 (lansing strain) rna that confer cap-independent internal initiation, we determined the in vitro translational efficiencies of a series of deletion and po ...19911656078
human papillomavirus infection of the oral mucosa.this article reviews the lesions of oral mucosa that contain human papillomavirus (hpv). these hpv-associated lesions can be classified into two broad types on the basis of their biologic behavior, benign lesions and premalignant malignant or malignant lesions. benign oral lesions include squamous cell papilloma (scp), verruca vulgaris (vv), condyloma acuminatum (ca), and focal epithelial hyperplasia (feh). of these entities, vv, ca, and feh demonstrate characteristic hpv-induced cytopathic effe ...19911656809
analysis of neutralization-escape mutants selected from a mouse virulent type 1/type 2 chimeric poliovirus: identification of a type 1 poliovirus with antigenic site 1 deleted.a chimeric type 1/type 2 poliovirus (v510), in which the antigenic site 1 (ag1) of poliovirus type 1 (pv-1) mahoney was replaced by the corresponding site of poliovirus type 2 (pv-2) lansing, is known to be neurovirulent for mice and neutralized by both type 1 and type 2 monoclonal antibodies. neutralization-escape mutants to monoclonal antibodies specifically recognizing the pv-2 sequence were obtained from v510. the nucleotide sequence and the mouse neurovirulence of mutants were determined. a ...19911707949
the effect of site and mode of expression of a heterologous antigenic determinant on the properties of poliovirus hybrids.the antigenic site normally situated in the ef loop of vp2 (2ef) of poliovirus type 2 (lansing) [pv2 (l)] was expressed in 2ef or in the bc loop of vp1 (1bc) of pv1 (mahoney) [pv1 (m)]. a hybrid virus expressing the site in 2ef of pv1 (m) is known to be neutralizable by pv2 (l)-specific antisera and to induce neutralizing antibodies against pv-2 (l). in contrast, a hybrid expressing a related sequence in 1bc of pv1 (m), which maintained the length of the native bc loop, was not neutralizable by ...19911713280
identification of a consistent pattern of mutations in neurovirulent variants derived from the sabin vaccine strain of poliovirus type 2.complete nucleotide sequencing of the rnas of two unrelated neurovirulent isolates of sabin-related poliovirus type 2 revealed that two nucleotides and one amino acid (amino acid 143 in the major capsid protein vp1) consistently departed from the sequences of the nonneurovirulent poliovirus type 2 712 and sabin vaccine strains. this pattern of mutation appeared to be a feature common to all neurovirulent variants of poliovirus type 2.19911850043
antigenic sequences of poliovirus recognized by t cells: serotype-specific epitopes on vp1 and vp3 and cross-reactive epitopes on vp4 defined by using cd4+ t-cell clones.a panel of poliovirus-specific murine cd4+ t-cell clones has been established from both balb/c (h-2d) and cba (h-2k) mice immunized with sabin vaccine strains of poliovirus serotype 1, 2, or 3. t-cell clones were found to be either serotype specific or cross-reactive between two or all three serotypes. specificity analysis against purified poliovirus proteins demonstrated that t-cell clones recognized determinants on the surface capsid proteins vp1, vp2, and vp3 and the internal capsid protein v ...19921279196
risk level, knowledge, and preventive behavior for human papillomaviruses among sexually active college women.during the past decade, there has been mounting scientific evidence linking human papillomavirus (hpv) with cervical cancer and, at the same time, a great increase in physician consultations for hpv infections. hpv infection risk factors include multiple sex partners, early age at first intercourse, history of sexually transmitted diseases (stds), and smoking. this study surveyed 263 sexually active college women and concluded that (1) they are at considerable risk for contracting hpv, (2) they ...19921315349
[condylomata acuminata in children--detection of hpv 6/11 and 2. local therapy with interferon-beta hydrogel].four cases of genital warts in children (girls) are reported. hpv 6/11-dna was identified in two cases, and hpv 2-dna in one. in one case no virus identification was possible. the clinical features of the hpv 2-induced genital warts showed the typical morphology of condylomata acuminata. the mode of transmission of the virus, in absence of sexual contact, could not be explained. the hpv 2-associated genital warts might have been transmitted by autoinoculation from warts on the hands. topical tre ...19921315724
identification of candidate sequences that determine virulence in coxsackievirus b4.we have previously shown that a major determinant of virulence for coxsackievirus b4 mapped to the 5' end of the viral genome. comparison of the corresponding cdna sequences of a virulent and a non-virulent virus has allowed the identification of candidate determinants of virulence in the 5' untranslated region and the capsid proteins vp1, vp2 and vp4. thirteen nucleotide substitutions were observed in a region spanning 3298 nucleotides. four mutations were detected in the non-coding region. of ...19921320798
detection of enteroviruses in faeces by polymerase chain reaction.a polymerase chain reaction (pcr) technique for the detection of human enteroviruses in stool specimens was developed. the test was based on the synthesis of cdna, followed by pcr and slot blot hybridization. the primers used were selected from a highly conserved sequence in the 5'non-coding region of the enteroviral genome. by this method 27 different enterovirus serotypes (15 echo, 6 coxsackie a, 4 coxsackie b, poliovirus type 2 and enterovirus 71) from 89 patients could be detected. using pos ...19921324520
alterations of the p53 gene in human primary cervical carcinoma with and without human papillomavirus infection.a previous report using cervical carcinoma cell lines suggests that the inactivation of two tumor suppressor gene products, p53 and prb, either by complex formation with the e6 and e7 proteins of oncogenic human papillomaviruses (hpvs) or by mutation, may be an important step in cervical carcinogenesis (m. scheffner et al., proc. natl. acad. sci. usa, 88: 5523-5527, 1991). the present study was designed to clarify the association between p53 inactivation and infection with oncogenic hpvs in prim ...19921327506
inhibition of rotavirus in vitro transcription by optimal concentrations of monoclonal antibodies specific for rotavirus vp6.three monoclonal antibodies (mabs) obtained from inoculation of mice with either a serotype 1 human rotavirus or rotavirus sa11 (serotype 3) inhibited the in vitro transcription of rotavirus sa11. two of the mabs exhibited a biphasic inhibitory response. removal of antibody from mab preparations by adsorption with sepharose-protein g reduced the inhibitory activity completely for all three mab preparations. analysis by radioimmunoprecipitation and western blotting indicated that all three mabs r ...19921331302
purification and characterization of poliovirus polypeptide 3cd, a proteinase and a precursor for rna polymerase.a cdna clone encoding the 3cd proteinase (3cdpro) of poliovirus type 2 (sabin), the precursor to proteinase 3cpro and rna polymerase 3dpol, was expressed in bacteria by using a t7 expression system. site-specific mutagenesis of the 3c/3d cleavage site was performed to generate active proteolytic precursors impaired in their ability to process themselves to 3cpro and 3dpol. of these mutations, the exchange of the thr residue at the p4 position of the 3c/3d cleavage site for a lys residue (3cdpro ...19921331532
lymphoproliferative responses to human papillomaviruses in patients with cutaneous warts.in vitro lymphoproliferative responses of peripheral blood mononuclear cells (pbmc) from patients with cutaneous warts, caused by infection with human papillomavirus type 1 (hpv-1) or type 2 (hpv-2), were assayed during the course of treatment. purified hpv-1 and hpv-2 were used as antigens, as well as herpes simplex virus (hsv) and concanavalin a (con a). all patients had normal percentages of subsets within the pbmc population and normal lymphoproliferative responses to con a, and those with a ...19921335750
human papillomaviruses and skin cancer.human papillomavirus (hpv)-induced skin warts are classically benign lesions. however an association between specific hpv types and skin cancer becomes obvious in epidermodysplasia verruciformis (ev). the analysis of this disease suggests that lesions infected with hpv types 5 and 8 carry a high risk of developing squamous cell carcinomas. the oncogenes of ev-viruses appear to be e6 and e2, rather than e7. the 'high risk' ev-viruses, hpv 5, 8, and 47, differ from related hpv types in the transfo ...19921335790
epitope-mapped monoclonal antibodies against the hpv16e1--e4 protein.the human papillomavirus (hpv) e1--e4 protein is the only nonstructural late protein encoded by the virus. we have isolated three hybridomas producing monoclonal antibodies to the e1--e4 protein of hpv16, which is the hpv type most frequently associated with cervical cancer. the three antibodies (tvg 401, 402, and 403) detect adjacent epitopes within the major seroreactive region of the molecule and show no reactivity against the e4 proteins of hpv1, hpv2, hpv4, or hpv6. the e1--e4 protein migra ...19921371027
[relations of human papillomavirus and lesions of the oral mucosa].recently there has been an increased interest in the possible role that viruses and especially the human papilloma virus (hpv) could play in the etiology of lesions of the oral mucosa. a distinction has to be made between the so-called low-risk types of the virus (hpv-2, 6, 11, 13 and 32) which can be found in benign oral mucosal lesions, and the high-risk type (hpv-16), which predominantly is found in malignant oral mucosal lesions.199211894806
[mouse neurovirulence of antigenic chimeras (type i/ii) of polioviruses].the mouse-adapted lansing strain of poliovirus type 2 pv-2(l) induces fatal poliomyelitis in mice after intracerebral inoculation, while mice inoculated with mahoney strain of poliovirus type 1 pv-1(m) show no signs of disease. previous work had indicated that both the 5' non-translated region of the viral genome and the viral capsid protein, neutralization antigenic site i (n-ag1), were involved in mouse neurovirulence. in order to further explore the role of n-ag1 in mouse neurovirulence, anti ...19937686824
common warts from immunocompetent patients show the same distribution of human papillomavirus types as common warts from immunocompromised patients.we studied the papillomaviruses (hpv) found in 131 common warts from 111 immunocompetent patients by amplification of viral dna sequences with the general-primer-mediated polymerase chain reaction (pcr). the virus types were determined by restriction-enzyme cleavage and reverse-blot analysis. results were confirmed by using the southern blot technique. forty patients harboured hpv 2a, 25 individuals showed hpv 2c and 13 yielded hpv 57. common warts from 16 patients were induced by a variant of h ...19938385983
papillomavirus infection and its pathologic correlate in sexually active adolescents.we investigated the prevalence of human papillomavirus (hpv) and its pathologic correlation in an adolescent clinic population (13-20 years, mean 16 years) over a 2-year period. 413 cervical specimens were obtained and analyzed cytologically and by a southern blot (sb) method for hpv dna. 277 specimens from 210 patients could be fully analyzed. 23 patients (10.9%) were positive for hpv dna by sb. cytologic findings in these 23 patients demonstrated changes compatible with low-grade squamous intr ...19938390646
sch 38057: a picornavirus capsid-binding molecule with antiviral activity after the initial stage of viral uncoating.the activity of a new water-soluble molecule, sch 38057, against picornaviruses is described. sch 38057 inhibited plaque formation of selected entero- and rhinoviruses in a range of 10.2 to 29.1 microm (50% endpoint) and had a therapeutic index of 10 against poliovirus type 2 (polio 2) in hela cells. when administered orally or subcutaneously, sch 38057 protected mice infected with either coxsackievirus b3 (cvb3) or echovirus-9 from mortality. the molecule provided a low level of protection agai ...19938391247
childhood condyloma acuminatum: association with genital and cutaneous human papillomaviruses.we studied 25 children, age 7 months to 12 years 6 months, with anogenital warts, and their parents. in most children the warts were localized in the anal area, in 3 of 18 girls perianally and on the vulva, and in 4 girls exclusively on the vulva. southern blot hybridization studies disclosed an association of condylomata with human papillomaviruses (hpv) 6 and 11 in 74% and hpv 2 in 17.4% of patients. the clinical features were similar in warts induced by genital and cutaneous hpvs. even the hp ...19938393994
chiral discrimination and antipicornavirus activity of 6-oxazolinylisoflavan.racemic 6-oxazolinylisoflavan, a highly effective inhibitor of rhinovirus serotype 1b in vitro, was resolved by high-performance liquid chromatography on a chiral stationary phase in order to study the activity of the enantiomers against picornaviruses. the absolute configuration of the two isomers was determined by circular dichroism curves. the antipicornavirus activity of each isomer, separately collected, was evaluated in vitro against human rhinovirus serotype 1b, enterovirus 71, echovirus ...19938398593
immunity to poliovirus and immunization with inactivated poliovirus vaccine after autologous bone marrow transplantation.titers of antibody to poliovirus in 102 patients were determined with a sensitive neutralization assay before and 1 year after autologous bone marrow transplantation. at 1 year 14 patients (14%) had lost antibodies to poliovirus type 1 (p < .001), 10 (10%) to poliovirus type 2 (p < .05), and 13 (13%) to poliovirus type 3 (p < .01). twenty-two patients had lost antibodies to at least one type of poliovirus. follow-up of unimmunized patients 2 years (n = 40) and 3 years (n = 23) after transplantat ...19948038308
[typification of a subgroup of cervical papilloma by in situ hybridization. preliminary study].the purpose of this study was to analyze 19 patients infected with human papilloma virus (hpv), in order to determine the most frequent subtype. subjects were patients of the national institute of perinatology (inper), between 1991-1992. all the patients had positive cytology, cervical biopsy was done through colposcopy control. sample characteristics were: mean age 29 years, married; most of them multiparous (9/19) and 7 were monogamous. six out of 12 cytologies were positive for hpv, 12 out of ...19948056363
[riboprobes: an alternative in the detection of viral sequences].the use of riboprobes for the detection of rna viral sequences is analyzed. subgenomic fragments of cdna from poliovirus type 2, dengue virus type 4 and human immunodeficiency virus type 1, were inserted downstream sp6 and/or t7 promoters in the transcription vectors pgem-4z or psp64. rnas obtained by in vitro transcription in the presence of utp infinity (32p) were used as probes for the detection of rna viral sequences from infected cell lines in slot and northern blot assays. the poliovirus r ...19948073329
cutaneous warts in butchers.several studies have indicated a high prevalence of hand warts in meat handlers, although the reasons for this are not clear. the high prevalence may be partly due to hpv7, a virus found almost exclusively in meat handlers, but the source of hpv7 is not known. we have carried out a cross-sectional survey of hand warts in male meat workers and controls from other occupational groups, to investigate the reasons for the high prevalence of warts, and particularly of hpv7, in butchers. we studied 240 ...19948305325
mouse neuropathogenic poliovirus strains cause damage in the central nervous system distinct from poliomyelitis.poliomyelitis as a consequence of poliovirus infection is observed only in primates. despite a host range restricted to primates, experimental infection of rodents with certain genetically well defined poliovirus strains produces neurological disease. the outcome of infection of mice with mouse-adapted poliovirus strains has been described previously mainly in terms of paralysis and death, and it was generally assumed that these strains produce the same disease syndromes in normal mice and in mi ...19957476091
effect of chloro-, cyano-, and amidino-substituted flavanoids on enterovirus infection in vitro.synthetic flavans, isoflavans and isoflavenes substituted with chloro, cyano and amidino groups were tested for their in vitro activity against poliovirus type 2, coxsackie virus b4, echovirus type 6 and enterovirus 71. plaque-reduction assays showed that substituted 3-(2h)-isoflavenes, carrying a double bond in the oxygenated ring, possess antiviral activity higher than that of the corresponding isoflavans. the most effective compounds were 4'-chloro-6-cyanoflavan and 6-chloro-4'-cyanoflavan. s ...19957486950
simultaneous administration of oral rhesus-human reassortant tetravalent (rrv-tv) rotavirus vaccine and oral poliovirus vaccine (opv) in thai infants.rhesus-human reassortant tetravalent (rrv-tv) oral rotavirus vaccine was given at the same time as oral poliovirus vaccine (opv) or inactivated parenteral poliovirus vaccine (ipv) to thai infants at 2, 4 and 6 months of age. sera for rotavirus antibody studies were taken prior to and one month after each vaccination. after the first dose of vaccine at 2 months of age, 37% of the infants receiving rotavirus vaccine with ipv but only 10% of those receiving it with opv showed a seroconversion by ro ...19957625111
prevalence of antibodies to polioviruses & enteroviruses excreted by healthy children in bombay.a total of 132 healthy children between the ages one month and 12 yr were surveyed to determine the prevalence of antibodies to the three poliovirus serotypes. among infants up to six months of age, 73.2, 85.4 and 56.1 per cent had antibodies to poliovirus types 1, 2 and 3, respectively. in children of age groups 7 months to 3 yr and above 3 yr, antibody prevalence to the three poliovirus serotypes was 90.2, 86.9 and 57.4, and 83.3, 96.7 and 76.7 per cent, respectively. immunization coverage wit ...19957729847
5' utr of hepatitis a virus rna: mutations in the 5'-most pyrimidine-rich tract reduce its ability to direct internal initiation of translation.the 5'-terminal untranslated region (5' utr) of the uncapped hepatitis a virus (hav) rna contains two pyrimidine-rich sequences; one about 20 nucleotides (nt) in length in the vicinity of the aug initiation codon (nt 706-726), and a longer one (about 40 nt) encompassing nt 100 to 140. the latter includes a 13 nt 'core' sequence (positions 126-138 in the hm175 strain) which is 80% identical to the pyrimidine-rich tract of poliovirus type 1 rna (mahoney strain). representative cdnas of the entire ...19957730803
immune responses induced by administration of encapsidated poliovirus replicons which express hiv-1 gag and envelope proteins.several viruses have been exploited for the development of recombinant vaccine vectors in which to express foreign proteins. recently, we have described a system utilizing the rna virus, poliovirus. we have constructed poliovirus genomes in which regions of the capsid have been substituted with gene fragments of the hiv gag and env genes. a complementation system has been designed to encapsidate defective genomes by providing the capsid protein in trans from a recombinant vaccinia virus (vv-p1). ...19958525684
effect of diarrhea on the humoral response to oral polio vaccination.the purpose of this study was to measure the effect of concurrent diarrheal illness on seroconversion to trivalent oral polio vaccine (opv).19968852907
[the sorption of poliovirus type 2 by a carbon sorbent].materials are presented concerning the study of a possibility to use highly active carbon sorbent "dnepr-mh" to liberate the tape water from enteroviruses. investigations were carried out on the model of the vaccine strain of type-ii poliovirus. the sorbent samples, most active in respect of the virus sorption and differing by benzene capacity, were determined. optimal concentration of a sorbent has been established, ph and water temperature were chosen under which the sorption processes are mor ...19969044704
routine immunizations in adult renal transplant recipients.vaccination guidelines for transplant recipients include regular boosters of tetanus, diphtheria, and inactivated polio vaccine, but there are few published data on the efficacy of these vaccines in patients receiving immunosuppressive therapy.19979089223
a new who international reference reagent for use in potency assays of inactivated poliomyelitis vaccine.assays of the potency of inactivated poliovirus vaccine require the use of an appropriate reference reagent. preparation 91/574 was shown by international collaborative study to be suitable for determination of antigenic content and immunogenicity of inactivated poliovirus vaccines by in vitro and in vivo assays, respectively. the reagent is a trivalent blend of formaldehyde-inactivated monovalent pools of poliovirus type 1 (mahoney) poliovirus type 2 (mef-1) and poliovirus type 3 (saukett). stu ...19979167009
polio eradication in the world health organization south-east asia region by the year 2000: midway assessment of progress and future challenges.in the south-east asia region (sear) of who, paralytic poliomyelitis has decreased from 25,711 cases in 1988 to 3304 cases in 1995, representing an 87% reduction. by 1995, in 6 of 10 member countries--india, bangladesh, myanmar, nepal, indonesia, and democratic people's republic of korea--polio remained endemic. two countries, sri lanka and thailand, appear close to polio eradication, and 2, bhutan and maldives, reported no cases during 1989-1995. although reported rates of acute flaccid paralys ...19979203699
sequential use of inactivated poliovirus vaccine followed by oral poliovirus vaccine in oman.seroprevalence and geometric mean titers (gmts) were compared at 6 and 10 months after vaccination with monovalent type 1 oral poliovirus vaccine (opv) at 6 months and trivalent opv at 7 and 9 months. group 1 had received 4 doses of opv, group 2 opv at birth and 3 doses of opv and inactivated poliovirus vaccine (ipv), and group 3 placebo at birth and 3 doses of ipv. a total of 547 infants completed the study. at 10 months, seroprevalence to poliovirus type 1 was 98%, 99%, and 98% in groups 1, 2, ...19979203722
comparison of a monoclonal antibody-based igm capture elisa with a neutralization assay for assessing response to trivalent oral poliovirus vaccine.monoclone-based igm capture elisas were developed for each of the three poliovirus serotypes and compared with a neutralization assay for detecting response to trivalent oral poliovirus vaccine among 224 infants. the igm-based response rates were significantly higher than the neutralizing antibody-based rates: 95% versus 83% to poliovirus type 1, 99% versus 94% to poliovirus type 2, and 89% versus 59% to poliovirus type 3. igm responses to the first vaccine dose were significantly associated bet ...19979203727
clinical features and age distribution of patients with hpv 2/27/57-induced common warts.the morphology of common warts depends on the inducing human papillomavirus (hpv) type. in order to assess the impact of the virus type on wart epidemiology we determined the virus type by pcr and recorded anamnestic data of 238 patients with common warts. warts induced by the related hpv types 2, 27 and 57 predominated in the study population (n = 202). these warts mostly occurred as multiple verrucae vulgares, mosaic warts or endophytic warts. patients aged between 10 and 30 years were most af ...19979209679
structure of poliovirus type 2 lansing complexed with antiviral agent sch48973: comparison of the structural and biological properties of three poliovirus serotypes.polioviruses are human pathogens and the causative agents of poliomyelitis. polioviruses are icosahedral single-stranded rna viruses, which belong to the picornavirus family, and occur as three distinct serotypes. all three serotypes of poliovirus can infect primates, but only type 2 can infect mice. the crystal structures of a type 1 and a type 3 poliovirus are already known. structural studies of poliovirus type 2 lansing (pv2l) were initiated to try to enhance our understanding of the differe ...19979261087
common association of hpv 2 with anogenital warts in prepubertal children.anogenital (ag) warts in 31 prepubertal children were hpv typed by nonisotopic in situ hybridization (nish) using digoxigenin-labeled probes for human papilloma virus (hpv) types 1-5, 6, 11, 16, 18, 31, and 33. mode of transmission was determined from historical, clinical, and laboratory data independent of hpv typing. hpv 2 was detected most commonly (13/31 warts) followed by hpv 6 (7/31), hpv 11 (5/31), and hpv 16 (1/31). although not reaching statistical significance, our results suggested th ...19979336800
randomized comparison of early and late vaccination with inactivated poliovirus vaccine after allogeneic bmt.forty-five adult hla-matched sibling bmt recipients were randomized to receive inactivated poliovirus vaccine (ipv) at 6, 8 and 14 months (early group, n = 23) or at 18, 20 and 26 months after bmt (late group, n = 22). ninety-five percent of the early group patients had protective antibody titres of > or = 4 to poliovirus type 1 (pv1), poliovirus type 2 (pv2) and poliovirus type 3 (pv3) by a microneutralization assay prior to the first vaccination, at 6 months after bmt. the corresponding propor ...19979383230
[squamous intraepithelial lesions in young female university students].the authors investigated the frequency of squamous intraepithelial lesions (sil) in young women, in particular university students with special attention to morphological signs of the presence of human papilloma virus (hpv) in sil low grade-sil, lg-hpv. as compared with data in the world literature, they revealed a significantly lower rate of sil lg, hpv-2.81% as compared with 5.5% reported in who studies of young women. the authors analyzed the biological behaviour of sil, lg-hpv. as compared w ...19979424253
phylogenetic analysis of the human papillomavirus type 2 (hpv-2), hpv-27, and hpv-57 group, which is associated with common warts.human papillomavirus types 2 (hpv-2), hpv-27, and hpv-57, are three closely related viruses within the phylogenetic supergroup formed by the remotely related genital papillomaviruses. in contrast to this phylogenetic association, these three viruses are most often found in common warts at nongenital sites, but also occasionally in genital warts and mucosal lesions of the nasopharyngeal cavity. we studied the genomic diversity of hpv sequences in skin warts presumably caused by these viruses. the ...19979434721
use of free-flow electrophoresis for the analysis of cellular uptake of picornaviruses.free-flow electrophoresis is a powerful tool to separate subcellular vesicles such as early and late endosomes from plasma membranes. using this technique, the intracellular distribution of poliovirus type 2 sabin (pv2) and its derived subviral particles was analyzed upon infection of hela cells. comparison of various infection conditions showed that maximally 30% of total cell associated pv2 was found in endosomal compartments with the remainder being associated with plasma membrane fractions; ...19979527481
enteroviruses in sewage: comparison of different technologies for wastewater treatment and reuse.seven wastewater treatment plants were twice sampled to compare their different technologies for the removal of enteroviruses. these technologies are extended aeration, oxidation ditch, stabilization pond, aerated stabilization pond, submerged fixed film reactor, trickling filter and trickling filter followed by activated sludge in el-serw, el-rahamna, el-adliya, daqahla, el-barashiya, sohag and el-fayoum wastewater treatment plants, respectively. virus counts of raw sewage ranged between 2.7 x ...199717214145
biology and pathological associations of the human papillomaviruses: a review.historical cottontail rabbit papillomavirus studies raised early indications of a mammalian dna oncogenic virus. today, molecular cloning recognises numerous animal and human papillomaviruses (hpvs) and the development of in vitro transformation assays has escalated oncological research in hpvs. currently, their detection and typing in tissues is usually by southern blotting, in-situ hybridization and polymerase chain reaction methods. the complete papillomavirus virion constitutes a protein coa ...199810879257
inactivation of human immunodeficiency virus type 1, hepatitis a virus, respiratory syncytial virus, vaccinia virus, herpes simplex virus type 1, and poliovirus type 2 by hydrogen peroxide gas plasma sterilization.studies were conducted to determine the capability of a hydrogen peroxide gas plasma sterilization process to inactivate several types of viruses. six test agents were used: hiv type 1, human hepatitis a virus, respiratory syncytial virus, vaccinia, herpes simplex virus type 1, and poliovirus type 2.19989584802
detection of human papillomavirus type 2 related sequence in oral papilloma.oral papilloma is a benign tumourous lesion. part of this lesion is associated with human papillomavirus (hpv) infection. we analysed the genetical and histopathological evidence for hpv type 2 infection in three oral papillomas. southern blot hybridization showed hpv 2a sequence in one lesion. cells of the positive specimen appeared to contain high copy numbers of the viral dna in an episomal state. in situ staining demonstrated virus capsid antigen in koilocytotic cells and surrounding cells i ...19989699941
a putative human papillomavirus type 57 new subtype isolated from plantar epidermoid cysts without intracytoplasmic inclusion bodies.human papillomavirus type 60 (hpv-60) is the only virus type that has been identified in epidermoid cysts. in this study, hpv-57 dna was found in three out of 18 plantar epidermoid cysts with different histological features from hpv-60-associated cysts, using pcr and southern hybridization. the hpv-57-associated cysts had features resembling an hpv-2-specific cytopathic effect. the sequences of two hpv-57 dna clones isolated from two patients were identical, but differed at some positions from t ...19989714246
presence of antibodies to human papillomavirus virus-like particles (vlps) in 11-13-year-old schoolgirls.to allow meaningful approaches to vaccine development, it is important to know the extent of exposure to human papillomavirus (hpv) within the general population, and particularly the age at which the at risk population is infected. the humoral response to human papillomavirus is directed largely to conformationally-dependent epitopes on the whole virion. virus-like particles (vlps) of hpv types 1, 2, and 16 were produced using a baculovirus expression system, and were used in the intact state a ...19989783687
identification of an alternative open reading frame ("hidden gene"?) stringently required for infectivity of poliovirus cdna clones.translation of the uncapped poliovirus rna starts at the aug triplet spanning positions 741-743, and proceeds uninterrupted for almost the entire length of the genome. such a cap-independent mechanism of internal initiation of translation determines that a long, extra-cistronic region extends between the 5'-end and the main open reading frame (orf). we have identified 10 short orfs initiated by the alternative translation initiation codons acg, aua, and gug in the 5'-terminal extra-cistronic reg ...19989812311
anti-picornavirus activity of synthetic flavon-3-yl esters.the in vitro antiviral activity against picornaviruses (rhinovirus serotype 1b and 14, and poliovirus type 2) of new synthetic 3-hydroxyflavones, 3-acetoxyflavones, and substituted cinnamic and benzoic acid flavon-3-yl esters was evaluated. the maximum non-toxic concentration of compounds was determined in a human cell line (hela) suitable for the replication of the three viruses. their antiviral potency was measured by a plaque reduction assay. generally, rhinoviruses exhibited a higher sensiti ...19989865389
direct detection of sabin poliovirus vaccine strains in stool specimens of first-dose vaccinees by a sensitive reverse transcription-pcr method.a multiplex reverse transcription-pcr method was optimized to monitor the duration of excretion of sabin poliovirus strains in stools of vaccinees following administration of the first dose of the trivalent oral vaccine. the assay detected approximately 1 50% tissue culture infective dose of each poliovirus serotype spiked into cell culture media. although pcr inhibitors were frequently encountered in the stool specimens, a 1:20 dilution of the extracted rna was sufficient to obtain a positive p ...19999889205
isolation and biological characterization of 3(2h)-isoflavene-resistant and -dependent poliovirus type 2 sabin mutants.poliovirus type 2 sabin mutants were selected for drug resistance and dependence by plating on hela cell monolayers in the presence of 3(2h)-isoflavene, a compound related to dichloroflavan, which prevents the shut-off of host translation and poliovirus rna and protein synthesis. the drug-resistant mutants grew equally well in the presence and in the absence of the drug, while the drug-dependent mutants only grew in the presence of the compound. one dependent and one resistant mutant were charac ...19999934698
evaluation of the antimicrobial activity of a new super-oxidized water, sterilox, for the disinfection of endoscopes.the antimicrobial activity of a new super-oxidized water, sterilox, has been tested against mycobacterium tuberculosis, mycobacterium avium-intracellulare, mycobacterium chelonae, escherichia coli (including type o157), enterococcus faecalis, pseudomonas aeruginosa, bacillus subtilis var niger spores, methicillin-resistant staphylococcus aureus, candida albicans, poliovirus type 2 and human immunodeficiency virus hiv-1. under clean conditions, freshly generated sterilox was found to be highly ac ...19999949966
oral wart associated with human papillomavirus type 2.more than 100 human papillomavirus (hpv) types have been identified to date. of these, 24 types have been described as being associated with oral lesions. hpv-2 has been frequently associated with skin lesions, but the reports of oral lesions as features of mucosal infection are limited. a biopsy specimen of an oral wart on the right palate was taken from a 48-year-old man and examined for the presence of hpv the sections showed papillary growth of the epithelium with hyperkeratosis and parakera ...199910069543
paralytic poliomyelitis associated with live oral poliomyelitis vaccine in child with hiv infection in zimbabwe: case report.to describe a complication of oral vaccination with live, attenuated poliomyelitis virus in a child infected with hiv.199910092261
serum antibodies to polioviruses in alexandria, egypt.random sera, in a total of 192, were collected in the fever hospital of alexandria, egypt, and analysed for the presence of antibodies against polioviruses. the results show good antibody levels, only three sera (1.5%) were negative for poliovirus type 1, 5 (2.6%) for poliovirus type 2 and 10 (5.2%) for poliovirus type 3; one subject was completely negative.199910395057
antiviral activity of south brazilian medicinal plant extracts.brazilian plants are potential sources of useful edible and medicinal plants. hydromethanolic extracts prepared from 54 medicinal plants used in folk medicine to treat infections were screened for antiviral properties against five different viruses (hsv-1, hsv-2, poliovirus type 2, adenovirus type 2 and vsv). fifty-two percent of the plant extracts exhibited antiviral against one or more tested viruses. more specifically, 42.6% showed activity against hsv-1 (herpes simplex virus type 1), 42.6% a ...199910439486
'primer alignment-and-extension': a novel mechanism of viral rna recombination responsible for the rescue of inactivated poliovirus cdna clones.in the course of experiments designed to assess the potential role of alternative open reading frames (orf) present in the 5'-terminal untranslated region (5'-utr) of poliovirus type 1 (mahoney strain) genomic rna, we came across a double mutation that completely abrogated the infectivity of full-length cdna clones. the infectivity was rescued in trans by cotransfecting cos-1 cells with short rna transcripts of the wild-type 5'-utr of poliovirus type 2 lansing, provided a free 3'-oh was availabl ...199910466784
progress toward the global interruption of wild poliovirus type 2 transmission, 1999.since 1988, when the world health assembly resolved to eradicate poliomyelitis globally by 2000, substantial progress has been made in attaining this goal: the americas, the pacific rim, europe, and central asia appear to be polio-free. the remaining reservoirs where polio is endemic are confined to india and contiguous countries and to sub-saharan africa. in 1999, the recommended polio eradication strategies (i.e., achieving and maintaining high routine vaccination coverage with oral poliovirus ...199910503575
progress towards global poliomyelitis eradication. the approaching extinction of wild poliovirus type 2. 199910511815
epidemiological analysis of immunity to poliovirus after termination of an era of vaccination with opv in germany. an analysis of the german association against viral diseases (dvv).the global eradication of poliomyelitis by the year 2000 is an objective of the world health organization (who). since 1998, after a period of 37 years of vaccination using live oral poliovirus vaccine (opv), single use of inactivated poliovirus vaccine (ipv) has been recommended in germany. the present epidemiological analysis shows the immunity of 3474 patients to poliovirus types 1, 2 and 3 by using a microneutralization assay. a non-age-specific evaluation of antibodies seroprevalence to pol ...199910603664
inhibition of cap-dependent gene expression induced by protein 2a of hepatitis a virus.the viral protein 2a of hepatitis a virus (hav) lacks the conserved 18 aa sequence found in other picornavirus proteases; hence, it is unclear whether the induction of cpe by culture-adapted hav strains is due to 2a-mediated activity. moreover, the cleavage sites and actual borders of hav 2a are not known. accordingly, a nested series of cdna sequences encoding the segment of the hav polyprotein (aa 760-1087) were linked to the 5'-utr of poliovirus type 2 (lansing strain) and inserted downstream ...200010769081
influence of environmental factors on virus detection by rt-pcr and cell culture.the effects of clay, humic acid, u.v. light and shellfish tissue residues on the detection of poliovirus type 2 from environmental samples by culture and rt-pcr were investigated. rt-pcr showed 10-100 times greater sensitivity for pv2 detection in the absence of sample contaminants than did culture by plaque assay in bgm cell monolayers. bentonite clay (100-1000 mg l-1) and shellfish tissue residues reduced virus detection by plaque assay, but the effect of bentonite was mitigated by simple elut ...200010792521
vaccine-associated paralytic poliomyelitis in brazil, 1989-1995.at the present time, the only poliovirus-caused poliomyelitis cases reported in brazil and other countries of the americas are of vaccine etiology. it is important for epidemiological surveillance and immunization programs to evaluate the epidemiological profile of cases of vaccine-associated paralytic poliomyelitis (vapp) in order to establish criteria for case definition and vaccination strategies. to research vapp in brazil, 30 cases diagnosed and classified as such by the ministry of health ...200010846924
isolation of polioviruses and other enteroviruses in south greece between 1994 and 1998.during the five-year period between 1994 and 1998, a total of 217 clinical samples were assessed for the isolation of enteroviruses at the enterovirus reference centre for south greece. fourteen enterovirus strains belonging to different serotypes were isolated. these field strains were detected by cell culture in appropriate cell lines. they were subsequently identified by neutralizing antibodies with the lbm (lim-benyesh melnick) mixed antisera pools up to 1995 and rivm (national institute of ...200010906768
vaccine-associated paralytic poliomyelitis: a retrospective cohort study of acute flaccid paralyses in brazil.at the present time, in brazil and other countries in the americas, the only cases of paralytic poliomyelitis due to poliovirus are caused by vaccine strains. the recognition of possible determinants of vaccine-associated paralytic poliomyelitis (vapp) by public health surveillance and immunization programmes is relevant to inform the debate on criteria for case definition and vaccination strategies.200010922356
high level of immunity against poliomyelitis in albanian refugees in southern italy.the apulia region (southern italy) may be considered a "border region" which, due to its position, has to face daily arrivals of refugees, especially from albania. when the exodus of albanians took place in 1991, a seroepidemiologic study revealed a low seroimmunity to poliomyelitis. in 1996, a large outbreak of paralytic poliomyelitis occurred in albania. the aim of the study was to evaluate the poliomyelitis immunization level in a sample of albanian refugees who arrived in the apulia region b ...200011179938
papillary lesions of the oral cavity: relationship to human papillomaviruses.human papillomaviruses are a group of genetically related organisms that infect stratified squamous epithelium. unlike many other viruses that infect oral epithelium and induce lysis of the cells they penetrate, hpvs induce proliferative changes in these cells that result in both benign and malignant tumors. the common skin wart (verruca vulgaris) is induced by hpv 2 and 4. genital warts (condylomas) and the common solitary oral papilloma are associated with hpv 6 and 11. either hpv 13 or 32 cau ...200011323946
human papillomavirus infection in netherton's syndrome.netherton's syndrome (ns) is a hereditary disorder with dermatological signs (e.g. ichthyosis) and a complex immunological dysfunction. in immunodeficient individuals human papillomavirus (hpv) types are associated with carcinomas on non-mucosal sites.200111359395
antibody responses of healthy infants to concurrent administration of a bivalent haemophilus influenzae type b-hepatitis b vaccine with diphtheria-tetanus-pertussis, polio and measles-mumps-rubella vaccines.to confirm that children given a bivalent haemophilus influenzae type b-hepatitis b vaccine (bivalent hib-hb vaccine; comvax) concurrently with priming doses of diphtheria-tetanus-pertussis vaccine (dtp), a booster dose of diphtheria-tetanus-acellular pertussis vaccine (dtap), inactivated or oral polio vaccine (ipv or opv) and measles-mumps-rubella vaccine (m-m-r(ii)) have satisfactory antibody responses to all antigens.200111520252
the relationship between poliovirus multiplication, the siga antibody response and the serum neutralizing antibody titers after trivalent oral polio vaccination.the time kinetics of poliovirus and secretory iga (siga) antibody titers were examined in fecal samples from four vaccinees immunized with two doses of trivalent oral polio vaccine (topv) from 1996 to 2000. poliovirus types 1 and 2 multiplied in the human intestine after the first vaccination, and poliovirus type 3 multiplied after the second vaccination. additionally, poliovirus type 3 multiplied for several days in two cases after the first vaccination, and poliovirus types 1 and 2 multiplied ...200111806137
correlations between nuclear/cytoplasmic area ratio and classification of cervical smears.the aim of this study was to assess the nuclear/cytoplasmic (n/c) ratio using computerized image analysis of cervical smears with intraepithelial neoplasia (cin) grade i to iii associated or not with cellular changes of human papillomavirus (hpv) in an attempt to determine if this method is more sensitive for the estimation of the grade of cin. one hundred and ten cervical smears from women with a mean age 35.03 years were studied. the cytological diagnosis was as follows: cin i + hpv (11), cin ...200111876540
circulation of a type 2 vaccine-derived poliovirus--egypt, 1982-1993.in 1988, the world health assembly resolved to eradicate poliomyelitis globally by 2000. substantial progress has been achieved toward this goal, and with the circulation of wild poliovirus eliminated in most of the world, attention has focused on examining the potential for vaccine-derived poliovirus to circulate where wild poliovirus has disappeared. during 1999, sequences of historic poliovirus isolates were examined. this report summaries the results of that study, which indicate that oral p ...200111215882
apparent global interruption of wild poliovirus type 2 transmission.in 1988, the world health assembly of the world health organization (who) resolved to eradicate poliomyelitis by 2000. since then, the who region of the americas and western pacific region have been certified free of polio, and the european region is approaching 3 years since the last confirmed case of polio. transmission of wild poliovirus types 1 and 3 continues to decline in the other who regions. this report summarizes the evidence, obtained through surveillance for acute flaccid paralysis ( ...200111300627
transmission of wild poliovirus type 2--apparent global interruption. 200111315462
antipoliovirus flavonoids from psiadia dentata.the search for antiviral agents against vesicular stomatitis virus, herpes simplex virus type 1 and poliovirus type 2 in plants extracts, led to the isolation of two antipoliovirus flavonoids from the medicinal plant psiadia dentata (cass.) dc, asteraceae: 3-methylkaempferol and 3,4'-dimethylkaempferol. the antipoliovirus activity of both compounds was estimated by comparison with 3-methylquercetin, guanidine and ro-090179. the most potent inhibitor of poliovirus replication was 3-methylkaempfer ...200111900347
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