sequence analysis of the 22k, sh and g genes of turkey rhinotracheitis virus and their intergenic regions reveals a gene order different from that of other pneumoviruses. | the nucleotide and deduced amino acid sequences of three genes of turkey rhinotracheitis virus (trtv) together with the nucleotide sequences of the relevant intergenic regions were determined. the deduced amino acid sequence of one of the genes shows significant identity (42%) to that of the 22k protein of human respiratory syncytial virus (rsv). the trtv 22k gene, like that of rsv, has a second open reading frame, although the amino acid sequence deduced from this reading frame does not show an ... | 1992 | 1629697 |
the efficacy of nebulized metaproterenol in wheezing infants and young children. | the benefit of beta-adrenergic agonists in the treatment of acutely wheezing infants and young children has not been well documented in the outpatient setting. to determine the efficacy of nebulized metaproterenol sulfate, 74 children aged 36 months or younger with acute wheezing participated in a double-masked, randomized, placebo-controlled clinical trial. children received nebulized metaproterenol, either as an initial treatment or after a control treatment with normal saline solution. at bas ... | 1992 | 1558072 |
mucosal t cell distribution during infection with respiratory syncytial virus. | groups of 12-week-old balb/c mice were inoculated intranasally with respiratory syncytial virus (rsv) and sacrificed at regular intervals after infection. t lymphocyte subset distribution was determined in lung tissue, bronchoalveolar lavage (bal), peripheral blood, and spleen by means of flow cytometry employing monoclonal antibodies against the t cell membrane antigens thy1.2 (pan-t), ly2 (cd8), and l3t4 (cd4). thy1.2+ cells increased in the lung from 35.4% of total lymphocytes before infectio ... | 1992 | 1564449 |
[evaluation of 5 methods for the diagnosis of infections by respiratory syncytial virus]. | to compare and evaluate four different rapid methods of respiratory syncytial virus antigen detection with the isolation of the virus in cell culture. | 1992 | 1643129 |
detection of cattle infected with bovine viral diarrhea virus using nucleic acid hybridization. | a ribonucleic acid (rna) hybridization assay to identify cattle infected by bovine viral diarrhea virus (bvdv) is described. the rna probe was derived from the coding region at the 3' end of the genome of the nadl strain of bvdv. total rna from infected cell cultures or peripheral blood leukocytes from suspect animals was extracted and applied to nylon membranes with a slot blot apparatus. peripheral blood leukocytes were tested concurrently for bvdv by virus isolation. the results of hybridizat ... | 1991 | 1645592 |
respiratory syncytial virus infection reinforces reflex apnea in young lambs. | to evaluate the effect of respiratory syncytial virus (rsv) infection on reflex apnea elicited by application of water on the laryngeal mucosa, 11 healthy, term lambs were chronically instrumented at 2 wk of age. six lambs were inoculated with bovine rsv, and five lambs were mock-infected. the lambs were studied awake and unsedated before and 4, 8, 14, and 21 d after infection. rsv infection was associated with slight rhinorrhea and with moderately increased tracheal mucous discharge. there was ... | 1992 | 1570205 |
[virological surveillance of acute respiratory tract illnesses of children in morioka, japan. i. epidemiological patterns of infection with respiratory viruses over a 10-year period]. | a virological surveillance of acute respiratory tract illnesses (rti) of children in morioka, japan, was maintained from september 1973 to december 1983. nasal and throat swabs were collected from 4,334 children with rti. these patients consisted of 3,500 children (80.8%) with upper rti (urti) and 834 children (16.2%) with lower rti. when these patients with urti were classified by maximum temperature recorded into 4 groups (less than or equal to 37.0 degrees c, 37.1-37.9 degrees c, 38.0-38.4 de ... | 1991 | 1649233 |
viral pneumonitis. | viral pneumonitis can affect all age groups and normal as well as compromised hosts. this article discusses salient features of pneumonitis caused by respiratory syncytial virus, adenoviruses, varicella-zoster virus, herpes simplex virus, influenza a and b viruses, and cytomegalovirus. the clinical picture, diagnosis, treatment and prevention for each agent are discussed. | 1991 | 1649731 |
intracellular processing of the human respiratory syncytial virus fusion glycoprotein: amino acid substitutions affecting folding, transport and cleavage. | the intracellular processing and transport of the respiratory syncytial virus (rsv) fusion (f) glycoprotein was examined by comparing the maturation and stability of wild-type f, uncleaved mutant f and chimeric f glycoproteins expressed by recombinant vaccinia viruses to that of f protein expressed by rsv. one of the recombinant viruses, vf317, expressed f protein (f317) that was processed like the rsv f glycoprotein. f317 was synthesized initially as f0, the uncleaved glycosylated precursor of ... | 1992 | 1375280 |
effect of changes in the nucleotide sequence of the p gene of respiratory syncytial virus on the electrophoretic mobility of the p protein. | a consensus sequence for the p protein gene of the rsn-2 strain of respiratory syncytial (rs) virus was obtained by pcr amplification of cdna obtained by reverse transcription. this established that the extent of sequence variation between two p genes of strains of antigenic subtype b is similar to that among a strains, confirming the conservation of p genes within subtypes and the divergence of the two antigenic subtypes of rs virus. the p protein of rs virus exhibits anomalous electrophoretic ... | 1992 | 1549911 |
respiratory syncytial virus infection of human primary nasal and bronchial epithelial cell cultures and bronchoalveolar macrophages. | in adults, clinical symptoms caused by respiratory syncytial virus (rsv) are usually confined to the upper respiratory tract, whereas rsv infection in infants frequently causes bronchiolitis and pneumonia. the preferential localization of rsv infection to the upper airways may partially be due to protective immunity, but may also depend on a difference in susceptibility of epithelial cells from upper and lower airways, or on antiviral activities of bronchoalveolar macrophages (am). in this study ... | 1992 | 1550681 |
replication of parainfluenza type-3 virus and bovine respiratory syncytial virus in isolated bovine type-ii alveolar epithelial cells. | the objectives of our research were to determine whether bovine pulmonary type-ii alveolar epithelial cells could be isolated from bovine lung and maintained in tissue culture and to determine whether isolated bovine type-ii alveolar epithelial cells would support productive viral replication of bovine parainfluenza type-3 virus and bovine respiratory syncytial virus. type-ii alveolar epithelial cells were isolated from lungs of 4- to 7-day-old male holstein calves by enzymatic dissociation of p ... | 1991 | 1652906 |
rotavirus infection of the oropharynx and respiratory tract in young children. | oropharyngeal aspirates were obtained from 89 infants hospitalized with respiratory illnesses accompanied or not by diarrhea and 33 control patients without the diseases. rotavirus was detected from 25 of these patients by immunocytology, isolation of the virus in cultures of ma104 cells, or both. none of the control patients gave a positive result. the infection involves squamous cells and globlet cells probably originating from the oropharynx, and ciliated columnar epithelial cells from the re ... | 1991 | 1653306 |
isolation of adenovirus from lambs with upper respiratory syndrome. | the role of viruses in the etiology of recurrent upper respiratory disease in newly weaned lambs was studied during 1984-1985 at the north dakota sheep experiment station. serum samples collected from lambs at weaning, from lambs with signs of respiratory disease, and 3 weeks following the onset of clinical signs were tested for antibodies to ovine adenovirus (oav), respiratory syncytial virus (rsv), and parainfluenza type-3 virus (pi-3). virus isolation studies were performed on nasal secretion ... | 1991 | 1655060 |
severe respiratory syncytial virus pneumonia after autologous bone marrow transplantation: a report of three cases and review. | three patients with acute leukemia who underwent autologous bone marrow transplantation (bmt) in complete remission, developed a severe respiratory syncytial virus (rsv) pneumonia, which was fatal in two. identification of rsv was made on the products of bronchoalveolar lavage by direct immunofluorescence. as already described by others, the initial course of rsv infection varies, depending on whether it occurs sooner or later after bmt with a better prognosis in the latter situation. treatment ... | 1992 | 1571714 |
humoral immunity to respiratory syncytial virus infection in the elderly. | the relationship between serum immunoglobulins and the severity and risk of respiratory syncytial virus (rsv) infection in the institutionalized elderly was prospectively assessed during the winter of 1989-1990 at a 591 bed nursing home. forty rsv infections were identified out of 149 respiratory illnesses by isolation of the virus or by a greater than or equal to 4-fold rise in rsv-specific igg by eia. acute serum rsv igg levels were similar in those with rsv infection and those with non-rsv il ... | 1992 | 1573388 |
antiviral activity of 1-docosanol, an inhibitor of lipid-enveloped viruses including herpes simplex. | this article reports that 1-docosanol, a 22-carbon-long saturated alcohol, exerts a substantial inhibitory effect on replication of certain viruses (e.g., herpes simplex virus and respiratory syncytial virus) within primary target cells in vitro. to study the basis for its viral inhibitory activity, a suspension of 1-docosanol was formulated in an inert and nontoxic surfactant, pluronic f-68; this suspension exerted potent inhibitory activity on the ability of susceptible viruses to infect cultu ... | 1991 | 1660151 |
detection of rotavirus antigen in tracheal aspirates of infants and children with pneumonia. | clinical manifestations of respiratory tract infection often precede or coincide with rotavirus gastroenteritis in infants and children. to investigate the possible association between respiratory tract manifestations and rotavirus infection, the authors determined human rotavirus (hrv) antigen and respiratory syncytial virus (rsv) antigen in tracheal aspirates of 58 children with clinically diagnosed pneumonia by enzyme-linked immunosorbent assay (elisa) and immunofluorescent antibody technique ... | 1991 | 1661224 |
reinfection of lambs with bovine respiratory syncytial virus. | eight lambs which were experimentally infected with bovine respiratory syncytial virus (rsv) when they were six to eight weeks old were challenged with the same virus seven months later. after reinfection, lambs developed mild clinical disease and the virus was isolated from nasal swabs from three lambs and peripheral blood from two lambs. reinfection resulted in changes in peripheral blood cell populations. there was an early increase in the number of cd8+ t lymphocytes and b (lca p220+) lympho ... | 1992 | 1553439 |
[respiratory syncytial virus and immune response: from the diagnosis of infection to prospects of vaccination]. | | 1991 | 1665219 |
[from prevention to treatment of respiratory syncytial virus infections]. | | 1991 | 1665220 |
[respiratory syncytial virus, a pathogenic agent of the respiratory system]. | | 1991 | 1665224 |
longitudinal study of acute respiratory diseases in rio de janeiro: occurrence of respiratory viruses during four consecutive years. | the occurrence of different viruses in nasopharyngeal secretions from children less than 5 years old with acute respiratory infections (ari) was investigated over a period of 4 years (1982-1985) in rio de janeiro. of the viruses known to be associated with ari, all but influenza c and parainfluenza types 1, 2 and 4 were found. viruses were found more frequently in children attending emergency or pediatric wards than in outpatients. this was clearly related to the high incidence of respiratory sy ... | 1991 | 1668974 |
surveillance of respiratory syncytial virus infection: england and wales 1988-91. | | 1991 | 1669860 |
acute respiratory infections. | | 1991 | 1669902 |
[epidemiologic and etiologic study of acute respiratory infections in children under 5 years of age]. | this study also included epidemiologic data to determine the risk factors for the enhancement of these infections. the coagglutination technique for the rapid diagnosis of streptococcus was tried. five hundred and thirty one samples of pharingeal swabs were obtained from children with ari. 74% were younger than one year old. brochopneumonias constituted 66.39% of the cases. in total 357 agents were isolated 35% corresponding to bacteria in pure culture, 23.3% to mixed infections and 11.6% only v ... | 1991 | 1670472 |
successful therapy with ribavirin of late onset respiratory syncytial virus pneumonitis complicating allogeneic bone transplantation. | a 21-year-old patient developed interstitial pneumonitis nine months post bone marrow transplant for acute myeloblastic leukaemia. immunofluorescence of broncheoalveolar lavage fluid revealed the presence of respiratory syncytial virus (rsv). aerosolized ribavarin therapy resulted in rapid resolution of the pneumonitis with full recovery without any side effects. ribavarin therapy should be considered early in the management of bmt patients who develop rsv pneumonitis. | 1992 | 1600691 |
humanised monoclonal antibody to respiratory syncytial virus. | | 1991 | 1674780 |
immunoglobulin therapy in older infants and children. | the availability of intravenous immunoglobulin preparations and human monoclonal antibodies has broadened the potential utility of antibody therapy to include treatment of viral infections such as cytomegalovirus and respiratory syncytial virus and prevention and treatment of serious bacterial infections such as endotoxic shock and pneumonia in children with acquired immunodeficiency syndrome. as new polyclonal and monoclonal immunoglobulin preparations are developed for specific organisms or cl ... | 1992 | 1578124 |
the role of barrier precautions in infection control. | barrier precautions are a fundamental component of any infection control strategy and a critical aspect of all isolation systems. because many infections are transmitted from patient-to-patient via the hands of personnel, gloves and gowns are widely recommended to provide an extra measure of protection against cross-infection. it is not clear whether gloves are superior to handwashing (if performed obsessionally) in this respect, and there is little evidence that gowns confer additional benefit. ... | 1991 | 1679825 |
characteristics of successive epidemics of respiratory syncytial virus infection. | | 1991 | 1681283 |
genomic sequences of respiratory syncytial virus in otitis media with effusion. | | 1991 | 1681337 |
testing of bronchoalveolar lavage for the laboratory diagnosis of respiratory syncytial virus infections. | | 1992 | 1625082 |
summertime respiratory syncytial virus infection: epidemiology and clinical manifestations. | respiratory syncytial virus (rsv) is a common serious pathogen known to produce annual winter epidemics in young children. a 2-year study of children with significant respiratory disease during the summer revealed a 21% incidence of rsv infection. respiratory secretions collected from ill children in the lsumc outpatient clinics, from children seen by private physicians, and from children hospitalized with respiratory tract disease were assayed for rsv antigens. approximately 39% of those survey ... | 1992 | 1604385 |
identification of a linear epitope on the fusion glycoprotein of respiratory syncytial virus. | the fusion glycoprotein of the edinburgh strain of respiratory syncytial (rs) virus was cloned from infected cell mrna. a full-length clone was subjected to sequence analysis, and compared with other strains of rs virus. the inferred primary amino acid sequence was used to generate a nested set of overlapping peptides spanning the mature protein. peptides were synthesized on polyethylene pins and examined for their reactivity towards high titre human antisera. decameric peptides spanning the hig ... | 1990 | 1689370 |
cotton rats previously immunized with a chimeric rsv fg glycoprotein develop enhanced pulmonary pathology when infected with rsv, a phenomenon not encountered following immunization with vaccinia--rsv recombinants or rsv. | in studies conducted in the 1960s, children previously immunized with a formalin-inactivated respiratory syncytial virus (rsv) vaccine (fi-rsv) developed a greater incidence and severity of pulmonary disease during subsequent natural rsv infection than did controls. it was previously shown that cotton rats immunized with fi-rsv or immunoaffinity-purified fusion (f) glycoprotein developed enhanced pulmonary histopathology following intranasal challenge with rsv. in the present studies, various fo ... | 1992 | 1609551 |
recent observations regarding the pathogenesis of recurrent respiratory syncytial virus infections: implications for vaccine development. | respiratory syncytial virus (rsv) and influenza virus are common pathogens for all age groups. currently licensed influenza virus vaccines generally provide protection from clinically detectable disease caused by antigenically matched challenging viruses. in contrast, vaccine development for rsv has been hampered by the inability of candidate vaccines to induce protective immunity to naturally occurring infection. the precise mechanism(s) responsible for the rsv vaccine failures have not been de ... | 1992 | 1621415 |
oligomerization and post-translational processing of glycoprotein g of human respiratory syncytial virus: altered o-glycosylation in the presence of brefeldin a. | the post-translational maturation of the attachment g glycoprotein of human respiratory syncytial virus (rsv) was investigated. the g protein formed homo-oligomers which sedimented in sucrose gradients at the same rate as the fusion f protein tetramer. oligomerization of the g protein was insensitive to carbonylcyanide m-chlorophenylhydrazine, showing that this step occurs in the endoplasmic reticulum prior to o-glycosylation which initiated in the trans-golgi compartment. the sedimentation of t ... | 1992 | 1634876 |
identification of subgroups of bovine respiratory syncytial virus. | the occurrence of antigenic variation among nine isolates of bovine respiratory syncytial virus (brsv) was determined by examining their reaction patterns to human respiratory syncytial virus (hrsv) subgroup a and b monoclonal antibodies (mabs) by enzyme immunoassay and radioimmunoprecipitation with fractionation by sodium dodecyl sulfate-polyacrylamide gel electrophoresis by using mabs and polyclonal antisera to hrsv and brsv. shared epitopes were demonstrated on four of five structural protein ... | 1992 | 1583108 |
a subgroup-specific antigenic site in the g protein of respiratory syncytial virus forms a disulfide-bonded loop. | an antigenic site (represented by 15 amino acids, residues 174 to 188, designated peptide 12) of the large glycoprotein g of respiratory syncytial virus was demonstrated to be subgroup specific in peptide enzyme-linked immunosorbent assay tests with murine monoclonal antibodies and human postinfection sera. the role of individual amino acids in this subgroup-specific site was determined by use of single-amino-acid-deletion sets of peptides. when monoclonal antibodies were reacted with the deleti ... | 1990 | 1697913 |
an outbreak of respiratory syncytial virus in a bone marrow transplant center. | an outbreak of respiratory syncytial virus (rsv) infection occurred among 31 patients in a marrow transplant center over a 13-week period beginning in january 1990. rsv infection was also documented in 35 family members and employees. of 18 patients with pneumonia, 14 (78%) died. none of 13 with upper respiratory infection died. preengraftment patients tended to develop pneumonia more frequently than did engrafted patients. early administration of ribavirin may have had a beneficial effect in pa ... | 1992 | 1583345 |
bovine respiratory syncytial virus nucleocapsid protein: mrna sequence analysis and expression from recombinant vaccinia virus vectors. | the nucleotide sequence of the mrna encoding the nucleocapsid (n) protein of bovine respiratory syncytial (brs) virus, strain 391-2, was determined. recombinant vectors containing a cdna of the complete n gene were constructed, and expression of the n protein in eukaryotic cells was demonstrated using two different vector systems. the brs virus n mrna was 1197 nucleotides in length, exclusive of poly(a), and had a single major open reading frame that encoded a polypeptide of 391 amino acids with ... | 1992 | 1634882 |
[usefulness of microbial investigations in community-acquired pneumonia]. | community acquired pneumonia (cap) is a common and well known disease, however there is no definite agreement on a common diagnostic-therapeutic strategy. to evaluate the usefulness of microbial investigations in the clinical practice we performed a prospective study on 93 consecutive patients with a diagnosis of cap. group i consisted of 46 patients that underwent a diagnostic protocol including sputum, blood cultures and detection of specific antibodies against m. pneumoniae, adenovirus, respi ... | 1992 | 1585029 |
vaccination against acute respiratory virus infections and measles in man. | several viruses may cause more or less severe acute respiratory infections in man, some of which are followed by systemic infection. only for influenza and measles are licensed vaccines available at present. the protection induced by influenza vaccines, which are based on inactivated whole virus or viral subunits, depends largely on the matching of vaccine strain and circulating virus. measles vaccines, which are based on attenuated live virus, have been quite effective in controlling the diseas ... | 1992 | 1587542 |
[induction of il2 responsiveness in allergen-stimulated lymphocytes from children with post respiratory syncytial virus (rsv) infection]. | induced interleukin 2 (il2) responsiveness in allergen-stimulated lymphocytes from children with post respiratory syncytial virus (rsv) infection was studied. induction of il2 responsiveness in the patients lymphocytes was observed upon stimulation with allergens such as dermatophgoides farinae (df) antigen, ovalbumin (ova) and alpha-casein. such responses were not induced in age-matched normal lymphocytes. maximum response was shown in lymphocytes from children who had been suffering from the i ... | 1992 | 1622335 |
pulmonary eosinophilic response to respiratory syncytial virus infection in mice sensitized to the major surface glycoprotein g. | to investigate the contribution of immunity to individual respiratory syncytial (rs) virus proteins to the augmentation of pulmonary pathology, mice were scarified with recombinant vaccinia viruses (rvv) expressing individual rs virus proteins. the pulmonary response to infection with rs virus was monitored by bronchoalveolar lavage (bal). in mice vaccinated with the major surface glycoprotein (g), 14-25% of bal cells were eosinophils; these comprised less than 3% of bal cells from other groups ... | 1992 | 1591217 |
respiratory viruses induce production of histamine-releasing factor by mononuclear leukocytes: a possible role in the mechanism of virus-induced asthma. | histamine-releasing factor (hrf) is a cytokine produced by mononuclear leukocytes when stimulated with antigens or mitogens. hrf is capable of inducing degranulation of basophils and release of histamine. to determine if respiratory viruses can induce hrf production, mononuclear leukocytes from healthy adult donors were exposed to influenza or respiratory syncytial virus in vitro. hrf activity was tested by culturing the supernatants with fresh peripheral blood leukocytes and measuring the perce ... | 1991 | 1714484 |
oesophageal foreign body: an unusual cause of respiratory symptoms in a three-week-old baby. | impaction of a foreign body in the oesophagus is common in children. if the event is not witnessed by an adult or the object is radiolucent the diagnosis is difficult as respiratory symptoms may predominate. we report a three-week-old child with respiratory symptoms who had both a respiratory syncytial virus infection and a radio-lucent oesophageal foreign body. this case is the youngest yet reported and serves as a remainder of the difficulties in the diagnosis of this important condition. | 1992 | 1624897 |
testing of bronchoalveolar lavage for the laboratory diagnosis of respiratory syncytial virus infections. | | 1992 | 1625081 |
protection of balb/c mice from respiratory syncytial virus infection by immunization with a synthetic peptide derived from the g glycoprotein. | a synthetic peptide homologous to amino acids 174-187 of the g glycoprotein of the a2 strain of human respiratory syncytial (rs) virus (g/174-187) was shown to induce protection from live virus challenge of balb/c mice after immunization with three doses of 50 micrograms of peptide coupled to keyhole limpet hemocyanin. immunized mice showed high levels of circulating rs-specific antibodies as detected by elisa assay; however, no neutralizing antibodies were found. moreover, an important short-te ... | 1991 | 1720589 |
monoclonal antibodies to the fusion protein of bovine respiratory syncytial virus. | five monoclonal antibodies specific for bovine respiratory syncytial virus were characterized by western immunoblotting, radioimmunoprecipitation, and epitope mapping assays. the monoclonal antibodies were found to be specific for the fusion protein, and there were at least two antigen binding sites, one of which was neutralizing. | 1991 | 1723078 |
effect of "in vitro" exposure of bovine alveolar macrophages to different strains of bovine respiratory syncytial virus. | a vaccine strain of respiratory syncytial (rs) virus and an isolate from pneumonic calves (ac2) were inoculated onto cultures of bovine alveolar macrophages recovered by lung lavage, and the functional properties of the cells observed over a period of 10 days. in most cultures no infectious virus was produced although immunofluorescence indicated the presence of virus antigens in some cells. no significant difference was noted between infected and control macrophage cultures in their capacity to ... | 1992 | 1595187 |
serum antibodies against respiratory tract viruses in episodes of acute otitis media. | although the findings of epidemiological studies have suggested viral respiratory tract infection (rti) to be crucially involved in the development of acute otitis media (aom), the relationship between aom and viral rti remains unclear. serum samples, obtained in the acute and convalescent phases of 57 aom episodes (in 35 children during the first three years of life) were analysed for igg antibodies against influenza a viruses, influenza b viruses, parainfluenza virus type 1, respiratory syncyt ... | 1991 | 1645761 |
pathogenesis of severe acute respiratory infections in the developing world: respiratory syncytial virus and parainfluenza viruses. | respiratory syncytial virus (rsv) and parainfluenza viruses (pivs) are the most frequently isolated pathogens in infants and children with acute lower respiratory infection (lri) in the developed world. less information is available about their importance in lri in the developing world, but they are probably important there also. the pathogenesis of viral bronchiolitis and pneumonia involves inoculation and early replication in the upper respiratory tract, followed by aspiration into the lower r ... | 1991 | 1650494 |
impact of influenza virus infection as a cause of pediatric hospitalization. | from winter 1989 to spring 1990, a severe epidemic caused by influenza a (h3n2) and b viruses developed in japan. during the epidemic (december 1989 to february 1990), 244 children were admitted to the pediatric ward of nippon kokan hospital: 53 (21.7%) were hospitalized with influenza virus infection, 22 (9.0%) with rotavirus gastroenteritis, and 17 (7.0%) with respiratory syncytial virus infection. among those with influenza, 24 had type a and 29 had type b. most were young healthy children wi ... | 1992 | 1730904 |
viral vaccines for the prevention of childhood pneumonia in developing nations: priorities and prospects. | in concert with bacteria, respiratory viruses play a major role in the high rates of acute lower respiratory infection (alri) experienced in developing nations. respiratory syncytial virus, parainfluenza and influenza viruses, and the adenoviruses are the predominant viral causes of alri in both developed and developing regions. in this review, the epidemiologic data from developing nations for these viral infections are summarized and the current status of viral vaccines for prevention of alri ... | 1991 | 1650495 |
purification of human respiratory syncytial virus: superiority of sucrose gradient over percoll, renografin, and metrizamide gradients. | a method was devised for producing and purifying human respiratory syncytial virus (hrsv) preparations with high titers. previous attempts to obtain substantial amounts of purified human respiratory syncytial virus have been unsuccessful due to the extreme lability of this virus, its close association with the host cell membrane, and its tendency to aggregate during concentration procedures. we describe a comparative study of various purification media as well as a novel approach for obtaining h ... | 1991 | 1650782 |
clinical and serological studies in a series of 45 patients with guillain-barré syndrome. | we retrospectively reviewed the clinical files of 45 guillain-barré syndrome (gbs) patients admitted to our department between 1979 and 1989. the age distribution was bimodal with a first peak in young adults (20-40 years), and a second one between 60 to 70 years. seasonal distribution showed a late fall and a hivernal predominance. three patients experienced a second attack of gbs 2-9 years after the first one. thirty-one (69%) presented antecedent events, most often a respiratory tract infecti ... | 1991 | 1655983 |
viral pneumonia. | viral pneumonias are common in infants and young children but rare in adults. respiratory syncytial virus (rsv) and para-influenza viruses are the most frequent viral pathogens in infants and children. influenza virus types a and b account for over one half of viral pneumonias in adults. immunocompromised hosts are susceptible to pneumonias caused by cytomegalovirus (cmv) and other herpesviruses, as well as rubeola and adenovirus. diagnosis of viral pneumonia depends on appropriate viral culture ... | 1991 | 1659594 |
[virological surveillance of acute respiratory tract illnesses of children in morioka, japan. ii. rhinovirus infection]. | rhinoviruses (hrvs) were isolated from 307 children (7.1%) in the virological surveillance of 4334 children with acute respiratory tract illnesses in morioka, japan (september 1973-december 1983). although hrvs were isolated throughout the year, frequency of hrv infection was significantly higher (p less than 0.001) during the april-november (233/2853; 8.2%) than during the december-march (47/1481; 5.0%). there were two peaks of incidence in may (9.5%) and september (9.1%). during the may-septem ... | 1991 | 1665166 |
respiratory syncytial virus (rsv): a common health problem. | rsv infections pose a variety of considerations for emergency personnel. nurses should be suspicious of this cause of illness during the winter months because of its prevalence, should be able to recognize and treat those who are experiencing or are at risk for acquiring lower respiratory tract complications, and should be aware of the need to reduce the spread of the virus by using isolation techniques, vigorous hand-washing protocol, and other protective measures to reduce contact with the org ... | 1992 | 1740879 |
suppressed expression of icam-1 and lfa-1 and abrogation of leukocyte collaboration after exposure of human mononuclear leukocytes to respiratory syncytial virus in vitro. comparison with exposure to influenza virus. | human mononuclear leukocytes (mnl) exposed to respiratory syncytial virus (rsv) produce net il-1 inhibitor bioactivity with the anticipated consequences of cell cycle arrest, suppressed virus-specific proliferation, and reduced expression of activation markers. these studies were undertaken to investigate effects of exposure and resultant net il-1 inhibitor activity on the expression of the intercellular adhesion molecule-1 (icam-1), and its ligand the lymphocyte function-associated antigen (lfa ... | 1991 | 1677945 |
respiratory syncytial virus in children's hospitals. | | 1991 | 1683996 |
acute respiratory infections in australian aboriginal children: current knowledge and future requirements. | although inadequately documented, it is clear that acute respiratory infection (ari) is a major cause of morbidity and hospitalization in australian aboriginal children. aris continue to cause substantial mortality in aboriginal children, and they are likely to cause a variety of potentially serious sequelae. the literature emphasizes the importance of pneumonia as a cause of hospitalization of aboriginal children. there is good evidence that streptococcus pneumoniae and haemophilus influenzae a ... | 1991 | 1750265 |
location of a highly conserved neutralizing epitope in the f glycoprotein of human respiratory syncytial virus. | trypsin digestion of the purified f protein from human respiratory syncytial virus (long strain) generated a set of fragments in the amino-terminal third of the f1 subunit which contained the epitope 47f involved in neutralization. sequencing of five escape mutant viruses selected with monoclonal antibody 47f allowed us to map precisely two amino acid residues (262 and 268) of the f1 subunit which are essential for the integrity of this important epitope. the results are discussed in terms of th ... | 1990 | 1688629 |
the pneumographic and medical investigation of infants suffering apparent life threatening episodes. | investigation of 340 babies who suffered from apparent life threatening episodes (alte) was performed using pneumographic studies and a variety of medical investigations. a number of medical abnormalities were demonstrated by history or investigation, including gastro-oesophageal reflux (211), airways pathology (17), evidence of fits (25), brain-stem tumour (2), hypoglycaemia (2), respiratory syncytial virus (8) and possible munchausen by proxy (5). pneumographic abnormalities were detected in 2 ... | 1991 | 1756076 |
could preventive intranasal interferon lower the morbidity in children prone to respiratory illness? | recent studies have demonstrated that rhinovirus infections can be prevented in the family setting through use of intranasal interferon sprays which are commenced when another family member develops a cold. one hundred and twenty-seven children aged 4-9 years who had been hospitalized during their first year of life for severe infections caused by respiratory syncytial virus were studied virologically and epidemiologically during a seven-month period which included the winter months. the hypothe ... | 1990 | 1692602 |
demonstration of respiratory syncytial virus in an autopsy series. | respiratory syncytial virus (rsv) antigen was demonstrated in formalin-fixed, paraffin-embedded autopsy tissue using an immunoperoxidase technique. eighteen autopsy cases were selected on the basis of one of the following criteria: a positive culture for rsv, antemortem or postmortem; positive elisa test for rsv, antemortem or postmortem; or postmortem histology suggestive of paramyxovirus infection. controls included three cases from which parainfluenza or influenza virus had been cultured and ... | 1990 | 1695371 |
spontaneous pasteurellosis in captive rocky mountain bighorn sheep (ovis canadensis canadensis): clinical, laboratory, and epizootiological observations. | we observed clinical signs, compared adrenal responses, and performed diagnostic tests on 12 captive rocky mountain bighorn sheep (ovis canadensis canadensis) during a spontaneous outbreak of pasteurellosis. cortisol in urine and feces was measured for bighorns sampled three times between 20 october and 1 november 1986. by 6 november, four of these had developed pneumonia, four showed only mild rhinitis, and four remained clinically normal. bighorns that ultimately developed pneumonia showed ele ... | 1991 | 1758018 |
respiratory syncytial virus: virology, diagnosis, and vaccination. | attempts to develop a respiratory syncytial virus vaccine have revealed the antigenic heterogeneity of the virus and have highlighted the difficulties of inducing protective responses in very young infants. of the two subgroups of the virus, a and b, that cocirculate, a appears to be the most aggressive in infants, but protection against both will be required. although a degree of protection is transferred from mother to the infant via the placenta and by breast feeding, the mechanisms of protec ... | 1990 | 1696677 |
the respiratory syncytial virus subgroup b attachment glycoprotein: analysis of sequence, expression from a recombinant vector, and evaluation as an immunogen against homologous and heterologous subgroup virus challenge. | the attachment glycoprotein g of respiratory syncytial (rs) virus is important in both the antigenic and molecular diversity of the rs viruses. previous work has shown that the glycoprotein g of a subgroup a rs virus expressed from a recombinant vaccinia virus provides significant protection against homologous but not heterologous subgroup virus challenge. we undertook the cdna cloning and nucleotide sequencing of the g mrna of a subgroup b rs virus (8/60) to extend molecular comparisons of the ... | 1990 | 1697126 |
sequence comparison between the fusion protein of human and bovine respiratory syncytial viruses. | the nucleotide sequence was determined for the fusion (f) protein-coding mrna of the bovine respiratory syncytial virus (strain rb 94) and the amino acid sequence of the f protein was deduced for comparison with the sequence of human respiratory syncytial virus subtypes a and b (rss-2 and 18537 strains). the human and bovine rs virus f proteins (excluding the cleaved signal peptide) share 83 to 84% homology. the greatest divergence occurred within the f2 subunit in the region preceding the cleav ... | 1990 | 1703214 |
[the rapid diagnosis of chronic nonspecific lung diseases]. | rapid methods for the detection of viral antigens and immunoglobulins in nasal and bronchial washings from patients with chronic nonspecific pulmonary diseases (cnpd) are described. these methods are based on viral antigen and immunoglobulin agglutination with cellulose particles sensitized with specific sera and gamma-globulin fractions. the investigation takes just 3-5 min. respiratory syncytial virus, influenza a and b, parainfluenza viruses, adenoviruses, immunoglobulins g and m, and immunog ... | 1990 | 1704447 |
[pneumonia caused by respiratory syncytial virus in the adult]. | | 1991 | 1768759 |
synthetic peptides corresponding to the f protein of rsv stimulate murine b and t cells but fail to confer protection. | we have previously located a major neutralization site of the fusion protein of respiratory syncytial virus (rsv) in the polypeptide region extending from amino acids ile221 to glu232. in this report, 8 peptides corresponding to the six major hydrophilic regions of the f1 subunit were selected to analyse their immunogenic and protective capacities as well as their ability to block the high neutralization activities of 4 monoclonal antibodies (mabs). only 5 of the 8 peptides tested induced specif ... | 1991 | 1706591 |
respiratory syncytial virus infection and prevalence of subgroups a and b in hawaii. | respiratory syncytial virus was isolated from hospitalized children in hawaii in each month of the year during the period january 1987 to august 1989. subgroup a and subgroup b strains cocirculated, with subgroup a predominating. there was an alternating early-season and late-season peak incidence cycle as reported elsewhere. | 1991 | 1774271 |
rapid diagnosis of respiratory syncytial virus infection by using pernasal swabs. | the sensitivity and specificity of direct immunofluorescence microscopy performed on pernasal swab specimens and compared with those of nasopharyngeal aspirates were 93 and 99%, respectively. posterior nasopharyngeal swabs applied immediately to microscope slides allow a rapid and simple screening procedure for the diagnosis of acute respiratory syncytial virus infections. | 1991 | 1774282 |
immunodominant t-cell epitope on the f protein of respiratory syncytial virus recognized by human lymphocytes. | the lymphocyte proliferative responses to respiratory syncytial virus (rsv) were evaluated for 10 healthy adult donors and compared with proliferative responses to a chimeric glycoprotein (fg glycoprotein) which consists of the extracellular domains of both the f and g proteins of rsv and which is produced from a recombinant baculovirus. the lymphocytes of all 10 donors responded to rsv, and the proliferative responses to the whole virus were highly correlated with the responses to the fg glycop ... | 1991 | 1710289 |
[bacterial tracheitis in children]. | bacterial tracheitis (bt) was found in 10 of 748 children (1.3%) admitted with croup during 1983-1990. 9.9% of all the 748 croup cases seen (74) were admitted to the pediatric intensive care unit (picu) and 16 of the 74 required intubation. 10 of those intubated (62.5%) were found to have bt and had typical features of croup, including inspiratory stridor, hoarseness and cough. airway obstruction resulted mainly from accumulated tracheal pus. after endotracheal intubation all required frequent s ... | 1991 | 1783311 |
operator-induced contamination in cell culture systems. | operator-induced biological contamination in cell cultures is a multifaceted problem involving the unexpected introduction of other animal cells, microbial and viral contaminants. detailed studies on animal cell cross contaminations have been performed and published. the frequency of detection of problem cultures has been as high as 36% for one service performed in the usa, with interspecific cross contamination accounting for 25% and human intraspecific contamination representing 11%. awareness ... | 1991 | 1794620 |
mapping of a fusion related epitope of the respiratory syncytial virus fusion protein. | the region of the fusion glycoprotein of respiratory syncytial virus which reacts with a neutralizing and fusion inhibiting monoclonal antibody, was mapped using a deductive method derived from analysis of western blot reactivity of proteolytic fragments. reaction of the whole fusion protein was found to be so conformationally dependent, that complete digestion of the protein with a variety of proteases resulted in fragments which were not sufficiently reactive to permit mapping. for this reason ... | 1991 | 1711741 |
evaluation of a commercial enzyme immunomembrane filter assay for detection of respiratory syncytial virus in clinical specimens. | a commercial enzyme immunomembrane filter assay (eifa) for respiratory syncytial virus (rsv) was compared prospectively with isolation in cell culture and an enzyme immunoassay. a total of 595 respiratory specimens, mostly from pediatric patients, were examined. the eifa was 70.96% sensitive and 72.40% specific in comparison with cell culture. results for 40 specimens (6.72%) were uninterpretable, mainly due to filtration difficulties. twenty-one (25%) of 84 specimens whose results were initiall ... | 1991 | 1802701 |
psychological stress and susceptibility to the common cold. | it is not known whether psychological stress suppresses host resistance to infection. to investigate this issue, we prospectively studied the relation between psychological stress and the frequency of documented clinical colds among subjects intentionally exposed to respiratory viruses. | 1991 | 1713648 |
immunoprophylaxis of otitis media. | prospects for an effective otitis media vaccine are bolstered by a number of encouraging observations. results of pneumococcal polysaccharide vaccine trials beginning in 1975, the enormously enhanced immunogenicity of protein-hib polysaccharide coupled vaccines in infants, and the apparent effectiveness of a protein-pcp coupled vaccine in experimental otitis media suggest that a pneumococcal vaccine targeted to prevent invasive and middle ear infections is not too distant. the identification of ... | 1991 | 1805562 |
expression of the f glycoprotein gene from human respiratory syncytial virus in escherichia coli: mapping of a fusion inhibiting epitope. | a cdna copy of the gene encoding the entire amino acid sequence of the fusion (f) protein of human respiratory syncytial virus (strain a2) was inserted into a bacterial expression vector containing the lambda pr promoter. upon heat induction, escherichia coli cells harboring the vector produced a 45-kda peptide which reacted with rabbit polyclonal antiserum to the native f protein. expression of the f gene resulted in severe inhibition of bacterial growth, which was overcome by deletion of the d ... | 1991 | 1714666 |
secretory antibodies to cow milk proteins and to respiratory syncytial virus. | | 1991 | 1809016 |
a chimeric glycoprotein of human respiratory syncytial virus termed fg induces t-cell mediated immunity in mice. | popliteal lymph node cells taken from mice vaccinated with the fg glycoprotein were exposed in vitro to respiratory syncytial virus (rsv) antigens. proliferation to fg or rsv antigens was blocked with anti-cd4 monoclonal antibody treatment. fg-vaccinated mice developed classical late delayed type hypersensitivity (dth) reactions when exposed to fg antigen in vivo. | 1991 | 1811371 |
depression of lymphocyte responses to phytohaemagglutinin in lambs experimentally infected with bovine respiratory syncytial virus. | eight lambs were experimentally infected with bovine respiratory syncytial virus (brsv) and the responses of their peripheral blood lymphocytes to the mitogen phytohaemagglutinin and brsv antigen compared with that of control lambs injected with tissue culture fluid. the lymphocyte transformation responses to phytohaemagglutinin were significantly reduced five and 10 days after experimental infection with brsv (p less than 0.05). it appears that these reductions were associated with cd4+ lymphoc ... | 1991 | 1674620 |
use of intravenous gamma globulin to passively immunize high-risk children against respiratory syncytial virus: safety and pharmacokinetics. the rsvig study group. | infants with cardiopulmonary disease develop severe illness from respiratory syncytial virus (rsv) infection. safety, feasibility, and pharmacokinetics of intravenous gamma globulin (ivig) to prevent rsv illness were studied in 23 high-risk infants in a phase i trial. ivig with an rsv neutralizing antibody titer of 1:1,100 in 5% solution was given monthly over a 2- to 4-h period in a clinical setting during the rsv season. the first group (n = 7) received 500 mg/kg of body weight, the second gro ... | 1991 | 1718213 |
[indices of the humoral response to respiratory syncytial virus infection in children with acute bronchitis]. | examinations of 30 children with acute bronchitis have revealed a respiratory syncytial (rs) viral infection in 18. a reduced response to rs virus was seen in patients with bronchitis complicated by obstruction, in contrast to that in cases without obstruction. humoral response to this virus was reduced and delayed in younger children as against that in elder ones. even high levels of specific igg did not result in vitro neutralization of rs virus. | 1991 | 1724037 |
differential inhibitory effects of sulfated polysaccharides and polymers on the replication of various myxoviruses and retroviruses, depending on the composition of the target amino acid sequences of the viral envelope glycoproteins. | sulfated polysaccharides (i.e., dextran sulfate) and sulfated polymers (i.e., sulfated polyvinylalcohol and sulfated copolymers of acrylic acid with vinylalcohol) were found to be potent and selective inhibitors of the replication of respiratory syncytial virus (rsv) and influenza virus type a (influenza a virus) but not of other myxoviruses (parainfluenza 3, measles, and influenza b viruses). the compounds were also inhibitory to human immunodeficiency virus type 1 (hiv-1) and hiv-2 and simian ... | 1991 | 1725692 |
respiratory syncytial virus infections in pediatric liver transplant recipients. | respiratory syncytial virus (rsv) is the most important cause of lower respiratory tract infection in infants and young children. the charts of 17 children found to have rsv among 493 children who underwent liver transplantation between february 1985 and february 1991 were reviewed. the median age at diagnosis was 20 months. median time of diagnosis was 24 days after transplantation. thirteen patients developed nosocomial infections while convalescing from their transplant. common symptoms inclu ... | 1992 | 1727886 |
eosinophil degranulation in the respiratory tract during naturally acquired respiratory syncytial virus infection. | eosinophil cationic protein (ecp), a cytotoxic protein contained in the granules of eosinophils, has been suggested as having an important role in the pathogenesis of asthma. to determine whether ecp plays a similar role in bronchiolitis, we tested samples of nasopharyngeal secretions, obtained from a group of 47 children with various forms of illness related to respiratory syncytial virus (rsv) and from 26 children with non-rsv upper respiratory tract illness or bacterial pneumonia, for the pre ... | 1992 | 1731020 |
resistance to respiratory syncytial virus (rsv) challenge induced by infection with a vaccinia virus recombinant expressing the rsv m2 protein (vac-m2) is mediated by cd8+ t cells, while that induced by vac-f or vac-g recombinants is mediated by antibodies. | it was previously demonstrated that the vaccinia virus recombinants expressing the respiratory syncytial virus (rsv) f, g, or m2 (also designated as 22k) protein (vac-f, vac-g, or vac-m2, respectively) induced almost complete resistance to rsv challenge in balb/c mice. in the present study, we sought to identify the humoral and/or cellular mediators of this resistance. mice were immunized by infection with a single recombinant vaccinia virus and were subsequently given a monoclonal antibody dire ... | 1992 | 1731105 |
cloning and sequencing of the matrix protein (m) gene of turkey rhinotracheitis virus reveal a gene order different from that of respiratory syncytial virus. | several biochemical properties and the sequence of the fusion glycoprotein (f) have indicated that turkey rhinotracheitis virus (trtv) is a pneumovirus, subfamily pneumovirinae of the paramyxoviridae family. as trtv was known to generate polycistronic mrnas, cdna was generated from trtv strain uk/3bv/85-infected vero cell mrnas using an oligonucleotide primer corresponding to a region of the f gene. sequencing of four cdnas revealed that the gene adjacent to the beginning (3' end) of the f gene ... | 1992 | 1733097 |
further studies with short duration ribavirin aerosol for the treatment of influenza virus infection in mice and respiratory syncytial virus infection in cotton rats. | ribavirin aerosol administration has been shown to be effective in the treatment of respiratory syncytial virus (rsv) infections in infants and in influenza a and b virus infections in young adults. long treatment schedules and potential for environmental contamination have stimulated the search for alternative dosing schedules. thus, we attempted to determine the length of time of ribavirin aerosol necessary for effective treatment of influenza and rsv. in rsv-infected cotton rats, aerosolizati ... | 1992 | 1736809 |
viral respiratory infections in the institutionalized elderly: clinical and epidemiologic findings. | to prospectively evaluate the incidence and impact of viral respiratory infection in the institutionalized elderly during a winter season. | 1992 | 1740594 |
[atypical pathogen spectrum in community-acquired infections of the lower respiratory tract in childhood]. | over a period of 14 months, we obtained nasal and throat swabs for virological examinations from patients, admitted to hospital with suspected pneumonia. fifty-five cases of perihilar bronchitis and 103 cases of pneumonia were diagnosed based on radiological criteria. in 36% (n = 57) of the children, a pathogen could be determined by antigen elisa. we found the following spectrum: respiratory syncytial virus: 42%; influenza a: 8%; influenza b: 10%; parainfluenza 1: 3%; parainfluenza 2: 10%; para ... | 1991 | 1745250 |
respiratory syncytial virus pneumonia in hospitalized adults. | | 1991 | 1747009 |
cytokine (tumor necrosis factor, il-6, and il-8) production by respiratory syncytial virus-infected human alveolar macrophages. | human alveolar macrophages (am) are susceptible to infection with respiratory syncytial virus (rsv), but the infection is abortive after the initial cycles of virus replication. we have investigated if rsv infection of am results in the production of cytokines tnf, il-6, and il-8, all of which may modulate inflammatory and immune responses to the virus, as well as may directly protect respiratory epithelial cells against spread of infection. within 1 h after interaction with rsv, increased mrna ... | 1991 | 1753101 |