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[acute maternal anterior poliomyelitis in a non-endemic zone].the authors report the case of a 26 year old woman with acute anterior poliomyelitis contracted during the vaccination of her baby. despite having been herself vaccinated in infancy she was not protected against the poliovirus. the clinical interest of this uncommon case is a severe paralytic state with definitive paraplegia. the authors suggest serologic testing of patients born before 1967 especially if they are at risk of encountering the virus.19892561040
vecuronium infusion requirements in pediatric patients during fentanyl-n2o-o2 anesthesia.eighty-one pediatric patients, ranging from neonates to adolescents, were studied during fentanyl-n2o-o2 anesthesia to determine for each of them the vecuronium infusion required to maintain 90-95% neuromuscular block (nmb). electromyographic monitoring with train-of-four stimuli was used. the steady infusion rate was 62 +/- 15 (sd) micrograms.kg-1.hr-1 in neonates and infants. this rate was 40% of that required by children 3 to 10 years old (154 +/- 49 micrograms.kg-1.hr-1; p less than 0.05). i ...20072562909
endocytosis from coated pits of shiga toxin: a glycolipid-binding protein from shigella dysenteriae 1.evidence is presented that endocytosis is involved in the transport to the cytosol of the cytotoxin from shigella dysenteriae 1, shiga toxin, which acts by removal of a single adenine residue in 28-s ribosomal rna. inhibition of endocytosis by atp depletion of the cells prevented toxin uptake. exposure of hela s3 and vero cells to toxin at low extracellular ph, where translocation to the cytosol, but not endocytosis is inhibited, allowed the toxin to accumulate in a compartment where it was prot ...19892564398
intraspinal opioids: implications for monitoring. monitoring in the intensive care unit is essential.patients receiving intraspinal opiates should be monitored in the intensive care unit for at least 24 hours to prevent potentially lethal outcomes. these include respiratory depression caused by sequestration of the morphine in the cerebrospinal fluid and migration of epidural catheters in the subarachnoid or intravascular space. at this time, most hospitals are not equipped or staffed adequately to guarantee the safety of these patients outside the intensive care unit.20082570133
shigella dysenteriae type 1 infections in us travellers to mexico, 1988.in 1988, the number of shigella dysenteriae type 1 (sd1) infections reported in the usa increased five-fold over the annual mean from the previous decade. 44 (94%) of 47 interviewed patients reported recent travel to mexico; 33 (75%) of these had been tourists to the yucatan peninsula. 27 patients who had travelled to mexico were admitted to hospital, of whom 2 had a haemolytic uraemic syndrome; none died. the antimicrobial resistance pattern and plasmid profile of the yucatan strain were simila ...19892570242
the effect of an aversive event on the return of fear.an experiment on the return-of-fear (rof) was carried out on 40 snake- or spider-phobic subjects in order to determine whether an arousing event that occurs shortly before retest influences the magnitude of the rof. additionally, we attempted to produce a reinstatement of fear by introducing an unrelated aversive event (shock) after the fear had been reduced. the arousal manipulation successfully increased subjective arousal but not heartrate responsiveness. the increases in subjective arousal w ...20082573336
[ki-1 large cell lymphoma with secondary xanthomatous infiltration of the lesions by chemotherapy]. 20082575882
[differential indications, surgical technics and follow-up treatment concepts of elbow joint surgery in polyarthritis]. 20082576707
the company they keep. fifth annual meeting on oncogenes sponsored by the foundation for advanced cancer studies, inc., frederick, md, usa, june 27-july 1, 1989. 20072577367
the company they keep. fifth annual meeting on oncogenes sponsored by the foundation for advanced cancer studies, inc., frederick, md, usa, june 27-july 1, 1989. 20072577367
regulation of cell proliferation and differentiation by interferons. 20082581554
altered queuine modification of transfer rna involved in the in vitro transformation of chinese hamster embryo cells.altered queuine modification of trna has been correlated to neoplastic transformation, but no direct cause and effect relationship has been defined. in the present study, a potential role for this alteration has been assigned. the trna in normal chinese hamster embryo cells is significantly more queuine modified than the trna in their transformed chinese hamster embryo counterparts, even though the specific activity of the queuine modification enzyme is much lower in chinese hamster embryo cells ...20082582452
melanin concentrating hormone (mch): structure-function aspects of its melanocyte stimulating hormone-like (msh-like) activity.melanin concentrating hormone (mch) is a heptadecapeptide, asp-thr-met-arg-cys-met-val-gly-arg-val-tyr-arg-pro-cys-trp-glu-val, synthesized in the brain and secreted from the pars nervosa of teleost fish. this hormone stimulates melanosome (melanin granule) aggregation within integumental melanocytes of fishes but, in contrast, stimulates melanosome dispersion within tetrapod (frog and lizard) melanocytes. we determined the message sequence of the primary structure of mch which is responsible fo ...20082587419
expression and desensitisation of a2 purinoceptors on cultured bovine aortic endothelial cells.purine nucleotides and their metabolites are important mediators of vascular tone. adenosine promotes relaxation of vascular smooth muscle, acting on the a2 subclass of purinoceptors. there is some evidence that these receptors are also present on vascular endothelial cells. we have therefore examined cultured aortic endothelial cells for adenosine (a2) sensitivity. bovine aortic endothelial cells (ag4762) were obtained from the institute of aging cell repository (usa), and cultured in monolayer ...19892590913
causes of death and the histopathologic findings in fatal shigellosis.thirty-seven children (median age, 2 years) with shigellosis in bangladesh were subjected to postmortem examination to determine causes of death and the spectrum of intestinal histopathology. infecting species were: shigella dysenteriae 1, 7 cases; s. dysenteriae 2, 2 cases; shigella flexneri, 23 cases; shigella boydii, 4 cases; and mixed infection with shigella boydii and shigella sonnei, 1 case. complicating conditions detected before death included malnutrition in 25 cases, pneumonia in 11 ca ...19892594452
one year's experience using a rotating filter for therapeutic plasma exchange.the authors previously demonstrated the feasibility of using a rotating filter system for therapeutic plasma exchange. they now report on the technical details of a 1 year clinical experience. seventeen patients underwent 188 treatments. hemoaccess was provided by antecubital veins (147 rx), femoral catheters (37 rx), or an a-v fistula (3 rx). blood flows ranged from 75 to 100 ml/min. net plasma removed per treatment was 3,231 +/- 53 ml (mean +/- se, n = 188). mean plasma removal rate per treatm ...20082597461
cadmium and lead accumulation by goldfish exposed to aqueous refuse incinerator fly ash leachate. 20082597788
short-term structured treatment for avoidant personality disorder.forty-two men and 34 women (mean age 27.5 years) who met dsm-iii criteria for avoidant personality disorder were randomly assigned to 1 of 3 treatment conditions or to a waiting-list control group. treatment ss who participated in a 10-week group treatment program displayed significantly greater improvement on a variety of self-report and behavioral measures than did untreated control subjects. the inclusion of skills-training procedures did not contribute to the effects of graduated exposure pr ...20082600246
[risk factors for condylomata. a case control study].the present study involves 214 patients whose cervical smear showed signs of human papilloma virus infection (hpv), matched with 1042 controls. we demonstrate increasing odds ratio with the total number of sexual partners since first sexual intercourse (p less than 0.0001). moreover the cases have more often changed partners in the year preceding the diagnosis (odds ratio 2.6 p less than 0.0001). their male partners more often have occupations that expose them to "extra-conjugal adventures" (p = ...19892600372
measles vaccine. 20082602773
cockroaches (periplaneta americana) as carriers of agents of bacterial diarrhoea in accra, ghana.bodies and intestinal contents of 208 cockroaches (periplaneta americana), collected from kitchens in accra and some surrounding villages were cultured for enteric bacterial pathogens. six of them harboured three different serogroups of salmonella, one had shigella dysenteriae, 64 had coliforms, 13 had proteus species, two had pseudomonas species and the rest (122) carried none of the bacterial species mentioned above. the presence of salmonella species shigella dysenteriae and coliforms in thes ...19892611875
histotypic differentiation of neonatal mouse retina in organ culture.retinae from neonatal mice were explanted in toto, with or without the retinal pigment epithelium (rpe) and adjoining mesenchymal cells, and maintained in organ culture for up to 3 weeks. the explants remained flat, rosette formation was minimal and histogenetic changes followed in the normal sequence. after 11, 14 and 21 days in vitro the three cellular layers--the outer nuclear layer including well differentiated rod and cone perikarya, the inner nuclear layer and the ganglion cell layer--with ...19892612197
histotypic differentiation of neonatal mouse retina in organ culture.retinae from neonatal mice were explanted in toto, with or without the retinal pigment epithelium (rpe) and adjoining mesenchymal cells, and maintained in organ culture for up to 3 weeks. the explants remained flat, rosette formation was minimal and histogenetic changes followed in the normal sequence. after 11, 14 and 21 days in vitro the three cellular layers--the outer nuclear layer including well differentiated rod and cone perikarya, the inner nuclear layer and the ganglion cell layer--with ...19892612197
children's responses to different forms of expression of anger between adults.anger is not a homogeneous stimulus, but can vary on a variety of dimensions and domains. this study examined children's responses to anger as a function of: (a) the mode of expression of anger (nonverbal, verbal, verbal-physical), and (b) whether or not anger between others was resolved. children were presented with videotaped segments of angry and friendly interactions and asked questions concerning their responses. all angry interactions, including non-verbal anger, were perceived as negative ...20082612248
children's responses to different forms of expression of anger between adults.anger is not a homogeneous stimulus, but can vary on a variety of dimensions and domains. this study examined children's responses to anger as a function of: (a) the mode of expression of anger (nonverbal, verbal, verbal-physical), and (b) whether or not anger between others was resolved. children were presented with videotaped segments of angry and friendly interactions and asked questions concerning their responses. all angry interactions, including non-verbal anger, were perceived as negative ...20082612248
wisc-r stability and re-evaluation of learning-disabled students.this study investigated the temporal stability of wisc-r iq scores for learning-disabled subjects (n = 113). all study subjects were administered the wisc-r for an initial evaluation (m age = 8 years, 3 months) and a follow-up re-evaluation (m age = 11 years, 7 months). pearson product-moment correlations yielded coefficients that were considerably lower than those previously reported: r = .55, p less than .001 for the verbal iqs; r = .63, p less than .001 for the performance iqs; and r = .58, p ...20082613906
[nursing career development program by private industry--from job management to career management]. 20092615507
indomethacin blocks the anorexic action of interleukin-1.it has been reported recently that the central nervous system actions of interleukin-1 are mediated by the prostaglandin system in the brain. the present study was therefore performed in order to examine the hypothesis that indomethacin, an inhibitor of prostaglandin biosynthesis, might alleviate the interleukin-1-induced suppression of food intake in rats. the i.p. injection of interleukin-1 (2 micrograms/rat) resulted in a significant decrease in food intake. the pre-injection of indomethacin ...19892620696
indomethacin blocks the anorexic action of interleukin-1.it has been reported recently that the central nervous system actions of interleukin-1 are mediated by the prostaglandin system in the brain. the present study was therefore performed in order to examine the hypothesis that indomethacin, an inhibitor of prostaglandin biosynthesis, might alleviate the interleukin-1-induced suppression of food intake in rats. the i.p. injection of interleukin-1 (2 micrograms/rat) resulted in a significant decrease in food intake. the pre-injection of indomethacin ...19892620696
[meta-analysis. a systematic approach to the synthesis of knowledge]. 20082620806
[meta-analysis. a systematic approach to the synthesis of knowledge]. 20082620806
[diagnostic value of cranial computerized tomography in pediatric practice].a total of 100 clinical records have been studied to as certain the diagnostic use of brain ct. most frequent diagnoses are: hypoxic-ischemic encephalopaty, seizure disorders, psychomotor delay, head enlargement and trauma. the first years of life was the period with a higher frequency of applications and the greater percentage of pathologic results (75-80 por 100) was found among intracranial hypertension, fetal distress, macrocephaly or infections of central nervous system and their sequelae. ...20082629553
isolation of inhibitors of adenylate cyclase from dan-shen, the root of salvia miltiorrhiza.the effect of dan-shen extract, the root of salvia miltiorrhiza, on adenylate cyclase was investigated in both rat brain and rat erythrocytes. the etoac fraction of the meoh extract was proved to have significant inhibitory activity. potent inhibitory principles in the etoac fraction were isolated and identified as 4 polyphenolic acids, rosemarinic acid, lithospermic acid, and their methyl ester derivatives.19892630095
[detection of streptococci from various serological groups in animals].during the period from 1985 to 1988 we determined 228 strains of streptococci isolated from samples of various sorts of biomaterials, mainly animals. from this set of streptococci we classified 207 strains into serological groups according to the lancefield classification and about 30% strains into species by means of serological and biochemical methods. most of the strains were allocated to group c (37.28%) and group q (17.39%). 89 streptococci strains originated from pigs, 40 strains from hors ...19892631378
any more cordials to the drooping spirit? professional ethics, 1847-1989. 20092636862
[clinical-experimental examinations on phonetic function in edentulous patients and after insertion of total prostheses measured by the s-sound realization].lose of teeth and therapy by prosthesis interfering with the oral sectors that are necessary for s-sound articulation have an important influence on s-sound realization. hitherto, the resulting s-sound changes used to be evaluated only from a subjective point of view. the application of a complex measuring technique for s-sound analysis permitted to determine the influence of the upper and lower jaw plates on s-sound formation by experiments. in another series of experiments, it was shown that e ...20082640388
[serological diagnosis of campylobacter jejuni infections].antibody level to campylobacter in 28 sera of patients of whom campylobacter infection was confirmed by germ isolation from feces was tested. the investigation was performed using passive haemagglutination technique and as antigens heated and acid glycine extraction prepared from homologous and reference strains. for the method used the heated antigen proved to be superior. out of 28 tested patients of whom 92.8% were children, 8 sera were positive, 9 doubtful and 9, derived mainly from neonates ...19892640683
bilateral torsion of the normal ovary and oviduct in a young girl. 20082643670
bilateral torsion of the normal ovary and oviduct in a young girl. 20082643670
detection of enterotoxigenic escherichia coli after polymerase chain reaction amplification with a thermostable dna polymerase.the direct identification of enterotoxigenic escherichia coli from clinical specimens was examined by using the polymerase chain reaction (pcr) for amplifying the heat-labile toxin (lt) gene. two synthetic primers, each of which was 20 bases in length, were used with the thermostable dna polymerase from thermus aquaticus to amplify the lt gene. the amplified pcr products were detected by either gel electrophoresis or hybridization to a 24-base synthetic oligonucleotide probe conjugated to alkali ...19892644292
introduction and spread of multi-resistant shigella dysenteriae i in thailand.outbreaks of shigella dysenteriae i occurred in northeastern thailand in the fall of 1986 and again in the spring and fall of 1987 for the first time in over 20 years. the epidemic strain of s. dysenteriae i was resistant to tetracycline, streptomycin, chloramphenicol, and trimethoprim-sulfamethoxazole, but susceptible to ampicillin. trimethoprim resistance was chromosomally encoded by type i dihydrofolate reductase. in ubon province, where 10,000 cases of dysentery were reported, there were 3-5 ...19892644859
plasmid dna analysis by agarose gel electrophoresis on an epidemic-associated strain of trimethoprim resistant shiga's bacillus from gimira wereda (keffa administrative region, southwest ethiopia).a combination of genetic mating experiments and plasmid dna analysis by gel electrophoresis was carried out on an epidemic-associated shiga's bacillus with resistance type acssuttp, isolated in 1983 from gimira wereda, keffa administrative region, south west ethiopia. the donor strain contained 9 plasmid species. their sizes in megadaltons (mdal) were: 120, 40, 35, 12.5, 6.0, 5.1, 4.3, 2.5 and 1.7. analysis of escherichia coli k12 transconjugants revealed that the 40, 35, and 4.3 mdal plasmids c ...19892646117
a sonographic and karyotypic study of second-trimester fetal choroid plexus cysts.a prospective study was undertaken of 513 women between 15.6-24.1 weeks' gestation who had a level ii ultrasound examination followed immediately by a genetic amniocentesis. the presence or absence of fetal choroid plexus cysts was noted and the results correlated with the fetal karyotype. thirteen cases of choroid plexus cysts were observed sonographically, a prevalence of 2.5%. the size of the cysts ranged from 3-10 mm, with a median of 6 mm. there were no other sonographically detectable cong ...20092649818
lead toxicity and iron deficiency in utah migrant children.we determined the frequency of presumptive iron deficiency and lead toxicity in 198 utah migrant children, ages 9-72 months, during the summer of 1985. there were no confirmed cases of lead toxicity. thirteen per cent of those tested and 30 per cent of the children ages 9-23 months were iron deficient. hematocrit determinations accurately predicted iron deficiency in only 35 per cent of the children confirmed to have this disorder via erythrocyte protoporphyrin screening.20092650572
lead toxicity and iron deficiency in utah migrant children.we determined the frequency of presumptive iron deficiency and lead toxicity in 198 utah migrant children, ages 9-72 months, during the summer of 1985. there were no confirmed cases of lead toxicity. thirteen per cent of those tested and 30 per cent of the children ages 9-23 months were iron deficient. hematocrit determinations accurately predicted iron deficiency in only 35 per cent of the children confirmed to have this disorder via erythrocyte protoporphyrin screening.20092650572
renin: endocrine, paracrine, or part-paracrine control of blood pressure? 19892650710
pathogenesis of shigella diarrhea. xiv. analysis of shiga toxin receptors on cloned hela cells.binding kinetics of shiga toxin to hela ccl-2 cells and to cell lines cloned by limiting dilutions were determined. lines with a wide range of sensitivity to shiga toxin were obtained. binding data, analyzed by a computer-based scatchard model program, revealed two classes of binding sites, one of low affinity and high capacity and one of high affinity and low capacity. the number of high affinity, but not low affinity, sites present on the clones correlated with their sensitivity to toxin. tuni ...19892651533
[anxiety and the presence of the father at childbirth].the authors give a report of a follow-up the anxiety of 363 couples whereby the husband decided to be present at the childbirth and took part in the childbirth preparation courses. the anxiety state and anxiety trait in men was found to be significantly lower than in women. the data of women were compared to a matched control group consisting of 135 pregnant women. in cases where the husband was present at childbirth the anxiety state and anxiety trait of the women was considerably lower than in ...20072652033
interaction of shigella toxin with globotriaosyl ceramide receptor-containing membranes: a fluorescence study.the interaction of the b-subunit of shigella toxin with a globotriaosyl ceramide receptor incorporated into phosphatidylcholine vesicles was studied by fluorescence spectroscopy. from the position of the maximum in the emission spectrum and the accessibility to acrylamide quenching, it is concluded that a single tryptophan of a free b-chain is located in a highly polar environment, most likely on the surface of the folded polypeptide chain. binding of b-subunits to the membrane-associated globot ...19892653314
malignant hyperpyrexia. 19892653537
unusual nucleotide arrangement with repeated sequences in the escherichia coli k-12 chromosome.between 59 and 60 min on the escherichia coli genetic map, there is a highly conserved sequence of 29 base pairs, containing an inverted repeat of seven base pairs that appears 14 times, 32 or 33 base pairs apart, downstream of the iap gene coding region. about 24 kilobase pairs downstream of the 14 repeats, a similar 29-base-pair sequence with a spacing of 32 base pairs appears seven times. nucleotide sequences hybridizing with the 29-base-pair fragment were also detected in shigella dysenteria ...19892656660
inoculum size in shigellosis and implications for expected mode of transmission. 19892656880
[survey on overseas traveller's diarrhea at narita airport quarantine station--the species of bacteria isolated and the suspected countries for infection]. 19892657132
[clinical features of overseas travellers' infectious enteritis admitted in the hospitals for infectious diseases]. 19892657133
ct of intra-abdominal fluid collections.a wide variety of fluids including ascites, blood, pus, urine, bile, lymph, chyle, mucin, and cerebrospinal fluid can accumulate within the peritoneal and pelvic cavities. the location, appearance, and distribution of this fluid is governed by a number of anatomic and gravitational factors that when carefully analyzed, can help to reveal their source and etiology. computed tomography is ideally suited to document the presence of abdominal and pelvic fluid collections; display their location and ...20082657846
development of nephrology nursing care in europe: 1978-1988.nephrology nursing care in europe has been accelerated by medical and technical advances. nurses are becoming more and more involved in decision-making processes as opposed to the traditional serving role. this article analyzes some aspects responsible for these changes in europe from 1978-1988 and how nephrology nurses adapted to these developments.20072658872
secretory immunoglobulin a response to shiga toxin in rabbits: kinetics of the initial mucosal immune response and inhibition of toxicity in vitro and in vivo.although the role of shiga toxin in dysentery is unknown, the toxin is cytotoxic to hela cells, causes fluid secretion in rabbit intestine, and is lethal to rabbits and mice when injected parenterally. in the present study, rabbits received three weekly doses of shiga toxin directly into chronically isolated ileal loops. within a week, secretions from these loops contained immunoglobulin a (iga) anti-shiga toxin. the titer of iga anti-shiga toxin increased after weekly doses 2 and 3. little igg ...19892659525
intraoperative staging in ovarian cancer.in patients with early stage i or ii ovarian cancer a meticulous staging laparotomy is required; this should include omentectomy, pelvic and paraaortic lymphadenectomy, multiple peritoneal biopsies and diaphragmatic biopsies. adjunctive therapy is based on these surgical-pathological findings. in patients with advanced disease (stages iii and iv) it has been demonstrated that optimal tumour reduction enhances the length of survival. a complete resection of all gross disease in the abdominal cavi ...20092661086
epidemic shigellosis due to shigella dysenteriae type 1 in south asia. 19892661420
quantitation of the rabbit intestinal glycolipid receptor for shiga toxin. further evidence for the developmental regulation of globotriaosylceramide in microvillus membranes.shiga toxin, produced by shigella dysenteriae 1, causes enterotoxic, cytotoxic, and neurotoxic effects, which may be mediated by a glycolipid receptor, globotriaosylceramide, gb3. to study the relationship of this receptor and toxin effects, globotriaosylceramide was quantitated and further characterized in rabbit small intestinal microvillus membranes at various ages. glycolipids were extracted from rabbit microvillus membranes, purified on unisil columns, and quantitated by high-performance li ...19892663611
congo red-mediated regulation of levels of shigella flexneri 2a membrane proteins.the ability of shigella spp. to bind congo red from agar medium is generally correlated with their virulence properties. we used a metabolically active culture of shigella flexneri 2a to determine the effect of congo red on its membrane protein profiles. virulent s. flexneri grown in the presence of congo red at 37 degrees c showed increased levels of three proteins with mrs of 43,000, 58,000, and 63,000 (43k, 58k, and 63k proteins) in the sarkosyl-soluble membrane fractions. the observed phenom ...19892663721
introduction to immunocytochemistry.immunocytochemistry has opened a new era in research and diagnosis. the development of immunocytochemical methods has made it possible to identify in situ normal and pathological tissue constituents, which it has not been possible to detect using ordinary histological methods. however, immunocytochemical techniques involve several pitfalls, which without proper control protocols can easily lead to incorrect findings. when interpreting the results obtained, account must always be taken of the mor ...20092664772
species differences in the pharmacology of terminal 5-ht autoreceptors in mammalian brain. 20092665245
griseofulvin and ketoconazole in the treatment of dermatophyte infections. 20092666321
rapid method to detect shiga toxin and shiga-like toxin i based on binding to globotriosyl ceramide (gb3), their natural receptor.shiga toxin and the closely related shiga-like toxins produced by escherichia coli represent a group of very similar cytotoxins that may play an important role in diarrheal disease and hemolytic uremic syndrome. these toxins have the same biologic activities and according to recent studies also share the same binding receptor, globotriosyl ceramide (gb3). they are currently detected, on the basis of their ability to damage several cell lines, by using expensive and tedious assays that require fa ...19892666433
use of monoclonal antibodies to type shigella flexneri in bangladesh.a panel of 10 mouse and rat monoclonal antibodies specific for different type- and group-specific o-antigenic determinants of shigella flexneri lipopolysaccharide was used to serotype 240 isolates of s. flexneri from bangladesh. three immunoglobulin m antibodies were used in a direct slide agglutination test; seven immunoglobulin g antibodies were absorbed to staphylococcus aureus and used in a coagglutination assay. all but 13 of the isolates could be serotyped by using the monclonal antibodies ...19892666435
cryptococcus neoformans in the seminal fluid of an aids patient. a contribution to the clinical course of cryptococcosis.in a 33-year-old hiv-positive homosexual male suffering from unexplained headache, cryptococcosis was diagnosed in a progressive secondary stage. after treatment with the standard combination therapy of amphotericin b + flucytosine for 34 d, the patient was clinically symptom-free and discharged, upon his own request, from the hospital. he remained under ambulatory mycological control. after an interval of 65 d during which the urine had been free from cryptococcus neoformans (cr.n.), the fungus ...19892666852
purification, crystallization, and preliminary x-ray diffraction studies of the flavoenzyme mercuric ion reductase from bacillus sp. strain rc607.the flavoenzyme mercuric ion reductase from bacillus sp. strain rc607 was purified by dye-ligand affinity chromatography. the protein was crystallized from solutions of high ionic strength, and one of the two crystal forms obtained has proven suitable for x-ray diffraction studies. preliminary analysis showed that these crystals belong to the tetragonal space group 1422. the unit cell dimensions are a = b = 180.7 a; c = 127.9 a. the diffraction pattern extends to better than 3 a resolution. crys ...19892668287
hemolytic uremic syndrome and diarrhea in argentine children: the role of shiga-like toxins.shiga-like toxin-producing escherichia coli have been associated with hemorrhagic colitis and the hemolytic uremic syndrome (hus). because argentina has the highest reported frequency of hus in the world, argentine children were prospectively studied during the hus seasons for evidence of shiga-like toxin-related diseases. on the basis of serology, fecal cytotoxin neutralization, stool cultures, and dna hybridization of colony lysates, most children with hus had evidence of infection with shiga- ...19892668430
[bacillary dysentery--1987]. 19892669032
diagnosis of pancreatic carcinoma by fine needle aspiration cytology and computerized cytomorphometry.eighty-one fine needle aspirations (fnas) of pancreatic masses were performed between 1980 and 1988. histologic or clinical follow-up was available for correlation with 78 aspirates. the fna cytologic diagnosis of pancreatic carcinoma had a sensitivity of 79% and a specificity of 91%. fifteen of the fna specimens were examined with the zeiss ibas image analysis system to determine nuclear area, form (shape), diameter, density and integrated optical density (iod). nuclear area and iod correlated ...20072669782
hodgkin's disease and non-hodgkin's lymphomas. 20092670408
antibiotics in the management of shigellosis in children: what role for the quinolones?in the last 20 years, epidemic bacillary dysentery due to shigella dysenteriae type 1 has become an important cause of serious morbidity and death in children less than 5 years of age in a number of developing countries; in many instances the infecting strains have been resistant to many or all of the usually recommended antibiotics. moreover, an increasing proportion of shigella strains of other serotypes isolated in all parts of the world are now resistant to the most commonly used antibiotics ...19892672246
mechanisms of tumor induction by human retroviruses.oncogenesis can be induced by chronic and acute rna tumor viruses through a promoter/enhancer insertion mechanism and through a transforming protein coded by a viral oncogene (v-onc), respectively. a hypothetical trans-activating mechanism is invoked by retroviruses with trans-activating regulatory proteins. so far, in humans only htlv-i has been firmly linked to a malignancy. the same virus is also implicated in slowly progressing neurological disorders. except for transformation by viral oncog ...19892673254
clinical & bacteriological profiles of shigellosis in calcutta before & after an epidemic (1984-87).patients below 5 yr of age, hospitalised for shigellosis over a period of four years (1984-87), were studied. during the epidemic of bacillary dysentery (1984) isolation of different shigella spp. as well as shigella dysenteriae type 1 was high. decreased isolation of sh. dysenteriae type 1 and increased isolation of sh. flexneri was observed during post-epidemic years (1985-87). isolation of different shigella spp. was always above 25 per cent from patients with dysentery and greater than 7 per ...19892674001
lymphocyte homing.the phenomenon of "homing" is discussed with respect to patterns of lymphocyte circulation and the molecules on the surface of both endothelium and lymphocytes that mediate this process. in addition, the data are analysed in the context of a model for lymphocyte homing.19892675225
[clinico-pathogenetic correlations in acute infectious diarrhea]. 20092675261
isolation and characterization of functional shiga toxin subunits and renatured holotoxin.shiga toxin is a protein toxin produced by shigella dysenteriae type i strains. in this report we present a procedure for the separation of functionally intact toxin a and b chains and for their reconstitution to form biologically active molecules. in agreement with the findings of others, the isolated a chain was shown to be a potent in vitro inhibitor of eukaryotic protein synthesis. the isolated b chain bound to hela cells and competitively inhibited the binding and cytotoxic activity of holo ...19892677606
normal catch-up growth in rats severely food-restricted prior to lesions of the dorsomedial hypothalamic nucleus: the first 48 hours.following a brief period of ad lib (al) feeding, 45-day-old male sprague-dawley rats were either fed al or food-restricted (rest) for 21 days to 50% of the intake of the al rats. at this time, some al and some rest rats received electrolytic lesions in the dorsomedial hypothalamic nuclei (dmnl), whereas other al and rest rats were sham-operated (con). following this, all rats were refed (ref) al and killed two days later. at this time, dmnl-rest + ref and dmnl-al weighed as much as con-rest + re ...19892678164
captopril--nifedipine interaction in hypertension.nifedipine, a calcium channel blocker exerts significant peripheral vasodilatory activity in hypertensive patients. it has been postulated that the antihypertensive effect of peripherally acting vasodilators is masked, by counter regulatory mechanism e.g. activation of renin-angiotensin aldosterone (raa) axis. the present work was undertaken to study the effect of blockade of raa axis using captopril, an angiotensin converting enzyme inhibitor on the blood pressure lowering activity of nifedipin ...20092681136
regulation of plasminogen activators and their inhibitors in rheumatic diseases: new understanding and the potential for new directions.over the past several years there has been a rapid expansion in our understanding of the fibrinolytic system. this includes knowledge of the components, availability of recombinant reagents and a better understanding of the regulation of fibrinolysis in health and disease. disturbances in the regulation of the balance between fibrin deposition and removal have been implicated in a number of inflammatory diseases including certain rheumatic diseases. this overview summarizes our knowledge of the ...20092681762
sonographic and pathological staging of patients with clinically localized prostate cancer.we evaluated 64 patients with clinically localized prostate cancer (on the basis of rectal examination, serum acid phosphatase, bone scan and pelvic computerized tomography scan) by transrectal sonography before radical prostatectomy. of the 48 patients with histologically proved localized prostate cancer sonography overstaged the disease in 5 (10%) and correctly staged it in 43 (90%). all overstaged cancer patients were scanned after either prostatic biopsy (4) or transurethral prostatectomy (1 ...20092681836
thymotaxin, a chemotactic protein, is identical to beta 2-microglobulin.thymotaxin, an 11-kilodalton protein chemotactic for rat bone marrow hematopoietic precursors, was purified from media conditioned by a rat thymic epithelial cell line. the nh2-terminal sequence of thymotaxin was identical to that of rat beta 2-microglobulin (beta 2m). antibodies to beta 2m removed thymotaxin activity from the fraction containing the 11-kilodalton protein. chemotactic activity was observed with rat plasma beta 2m, human beta 2m, and mouse recombinant beta 2m, further supporting ...19892683083
corticosteroids in homeostasis. 20082683585
corticosteroids in homeostasis. 20082683585
[cellular lectin binding sites in the human retinal pigment epithelium and photoreceptors--method of lectin histochemistry and results with peroxidase marked lectins in paraffin sections].lectins are sugar-binding proteins or glycoproteins which bind to specifically complementary sugar residues found in cell membranes and the cytoplasm. lectin-binding sites are determined by histochemical methods. cellular lectin-binding sites change with morphological and functional alterations of the cell, and the determination of lectin receptors can be used to identify specific cell types in histological sections. lectin-binding sites of the human retinal pigment epithelium (rpe) and photorec ...19892684825
recent advances in gastrointestinal malignancy. 20082686527
recent advances in gastrointestinal malignancy. 20082686527
monoclonal antibodies against the surface antigens of shigella flexneri serotype 1b and shigella dysenteriae serotype 1.monoclonal antibodies against the surface antigens of shigella flexneri 1b and s. dysenteriae 1 were prepared. the specificities of the antibodies were evaluated by enzyme-linked immunosorbent assay (elisa), and quantitative agglutination using microtiter plate. monoclonal antibodies against s. flexneri 1b, designated sf2b2 and sf2g4, belonged to igg2a and igg1 subclass, respectively. the former was specific for s. flexneri 1b, whereas the latter was reactive not only to s. flexneri 1b, but also ...19892687648
problems associated with the use of immediately dangerous to life and health (idlh) values for estimating the hazard of accidental chemical releases.the possibility of accidental industrial chemical releases has generated considerable recent attention. one area requiring research for emergency planning is the development of safe exposure concentrations for the public in the event of an inadvertent release. the united states environmental protection agency (epa) has established a list of extremely hazardous substances and suggested that the toxicity ranking for 92 hazardous materials could be based on the "immediately dangerous to life or hea ...20092688389
assay for sialidase using erythrocytes and peroxidase-labeled peanut lectin.a rapid and sensitive sialidase assay method based on peroxidase-labeled peanut lectin (pna) binding to desialylated erythrocyte is described. formalinized sheep erythrocytes were used both as a stable substrate for sialidase and as a target for the lectin. in the case of sialidases from vibrio cholerae and arthrobacter ureafaciens, a linear relationship was observed between the amount of peroxidase-labeled pna bound to erythrocytes and the enzyme amount. binding of the lectin to sialidase-treat ...19892688936
purification of shiga toxin by alpha-d-galactose-(1----4)-beta-d-galactose-(1----4)-beta-d-glucose-(1- ---) receptor ligand-based chromatography.a simple and rapid method for shiga toxin purification based on specific binding to the gal alpha 1----4gal beta 1----4glc globotrioside trisaccharide covalently linked to polyacryl/polyvinyl (fractogel) has been developed. a cell-free sonicate-filtrate of shigella dysenteriae type 1, strain 114sd was passed over the globotrioside-fractogel column, and bound toxin eluted with 6 m guanidine-hcl. a yield of 36 mg pure toxin/1 sonicate-filtrate was obtained, i.e. a one step 1224-fold purification. ...19892689221
nutritional anestrus in beef cows: concentrations of glucose and nonesterified fatty acids in plasma and insulin in serum.twenty-two nonlactating hereford cows exhibiting normal estrous cycles were fed either maintenance (m) or restricted (r) diets until most of the r cows became anestrus; r cows then were fed 160% of the m diet until estrous cycles resumed. concentrations of progesterone, glucose, insulin and nonesterified fatty acids (nefa) were determined in weekly blood samples. blood also was collected frequently, before and after i.v. infusion of 300 ml of a 40% glucose solution, to evaluate responses in bloo ...19892689418
[cataract surgery 220 years ago].the author reports on the first 14 cataract extractions performed by karl kaspar von siebold, a würzburg surgeon, in 1766/67. he used daviel's method. at that time there was no anesthesia, no sterility or even antisepsis, and no optical correction of aphakia for his patients. four eyes were lost due to infection and another four had much poorer vision after surgery due to irregular corneal scarring. in six cases both patient and physician were satisfied with the result. siebold's case reports ex ...20092689768
production of vero cytotoxin by escherichia coli and shiga toxin by shigella dysenteriae 1 as related to the growth medium and availability of iron.six strains of escherichia coli producing vero cytotoxin (vtec) and six strains of shigella dysenteriae 1 were examined for the production of extra- and intracellular vero cytotoxin (vt) and shiga toxin respectively, in relation to the growth medium and availability of iron. vtec secreted less extracellular vt1 or vt2 when grown in trypticase soy broth (tsb) containing the iron chelator desferal, as compared to bacteria cultured in iron replete tsb. growth in tsb containing desferal resulted in ...19892692581
falciparum malaria--present day problems. an experience with 425 cases.clinical details and present day problems encountered in 425 cases of falciparum malaria (pf) are reported. 10.11% had taken chloroquine prior to reporting to us. parasitic count done in 23.05% cases lacked correlation with severity of disease. pattern of fever varied markedly but 5.4% were afebrile throughout and presented only with bodyache and malaise. apyrexial spell was noted in 5.64%. 28.70% had typical facial looks of anaemia and sallow complexion. cerebral symptoms were noted in 3.05%. o ...19892693436
[shigellosis in the ussr: the etiological role of shigella dysenteriae].the etiological role of s. dysenteriae in shigella infections at different territories of the ussr in 1983-1987 is analyzed. the study shows that s. dysenteriae pertain to territories with unfavorable water supply of the population. at some of these territories, in particular the uzbek ssr, grigor'ev-shiga dysentery seems to gain ground and the restoration of the area of its spread occurs. in recent years the penetration of grigor'ev-shiga dysentery from abroad became more frequent in the presen ...19892694693
[drug resistance of the causative agent of grigo'rev-shiga dysentery (shigella dysenteriae 1)isolated in the ussr].forty strains of s. dysenteriae 1 isolated in the ussr within 1986-1988 were tested for their resistance to 11 antibacterial drugs. it was shown that 92.5-97.5 per cent of the isolates were resistant to chloramphenicol (cm) and tetracycline (tc), 22.5 per cent to streptomycin (sm), 17.5 per cent to nalidixic acid (nal) and 10 per cent to ampicillin (ap) and polymyxin (pm). resistance to cm tc (51.4 per cent) and cm tc nal (13.5 per cent) represented the predominating phenotype. 35 per cent of th ...19892694989
characterization and autoprocessing of precursor and mature forms of human immunodeficiency virus type 1 (hiv 1) protease purified from escherichia coli.a recombinant plasmid encompassing the human immunodeficiency virus type 1 (hiv 1) protease coding sequence and flanking regions (ala-13 to gly-185 of the pol open reading frame) has been expressed in two distinct strains of escherichia coli, ar58 and ar68. in the first strain, ar58, the primary translation product, a 25 kilodalton (kda) precursor protein, is short-lived and rapidly processes itself to the 11 kda mature protease in vivo. in the second strain, ar68, the 25 kda species is only par ...19892695927
[demands for quality and planning standards for model casting]. 20092697127
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