| the yersinia pestis v antigen is a regulatory protein necessary for ca2(+)-dependent growth and maximal expression of low-ca2+ response virulence genes. | the low-ca2+ response is a multicomponent virulence regulon of the human-pathogenic yersiniae in which 12 known virulence genes are coordinately regulated in response to environmental cues of temperature, ca2+, and nucleotides such as atp. yersinial growth also is regulated, with full growth yield being permitted at 37 degrees c only if ca2+ or a nucleotide is present. in this study, we constructed and characterized a mutant yersinia pestis specifically defective in the gene encoding the v antig ... | 1991 | 1901573 |
| bacterial entry into eukaryotic cells. | | 1991 | 1905978 |
| antimicrobial activity of microgard against food spoilage and pathogenic microorganisms. | microgard, a commercially available fermented milk product containing antimicrobial metabolites, was a potent inhibitor for gram-negative bacteria such as pseudomonas, salmonella, and yersinia when 1% concentration was incorporated into agar media. gram-positive bacillus cereus, staphylococcus aureus, and listeria monocytogenes were insensitive to microgard. kluyveromyces marxianus, an unidentified black yeast, and penicillium expansum were partially suppressed, whereas aspergillus niger and a y ... | 1991 | 1906486 |
| [study of the dependence of gene expression of plague pathogen plasmid 65md on the host bacterium genome]. | the conjugative cointegrate containing yersinia pestis 65 md plasmid coding for the production of traction i antigen and mouse toxin has been transferred into yersinia pseudotuberculosis, yersinia enterocolitica and escherichia coli cells. analysis of the transconjugants obtained has confirmed the connection of the genetical determinants for the mentioned bacterial products with the 65 md plasmid. the similar level of fra and tox-genes expression has been found in yersinia cells while fraction i ... | 1991 | 1906986 |
| the effect of pediococcus damnosus and pediococcus pentosaceus on the growth of pathogens in minced meat. | the antibacterial effects of one strain of pediococcus damnosus and two strains of pediococcus pentosacaeus against clostridium perfringens, listeria monocytogenes, salmonella infantis and yersinia enterocolitica were investigated. growth inhibition studies were conducted in juice from minced meat incubated at +6 degrees c and +15 degrees c for various periods after the inoculation with pediococci. inhibitory effects were seen for all bacteria tested. | 1991 | 1907475 |
| refeeding enhances intestinal repair during an acute enteritis in infant rabbits subjected to protein-energy malnutrition. | we examined the effects of refeeding during an acute bacterial enteritis on small intestinal repair in infant rabbits subjected to protein-energy malnutrition and in noninfected and infected dietary controls. malnutrition was induced by litter expansion at 7 d of age. randomly selected litters from both dietary groups were infected on d 17 with yersinia enterocolotica. inflammation and intestinal damage were observed in the jejunum and ileum at the "acute stage" of infection in 23-d-old animals ... | 1991 | 1907731 |
| synovial fluid-derived yersinia-reactive t cells responding to human 65-kda heat-shock protein and heat-stressed antigen-presenting cells. | humoral and cellular immune reactions to heat-shock proteins have been implicated in the pathogenesis of arthritis. heat-shock proteins occur in bacteria as well as all eukaryotes and have been highly conserved during evolution. cross-reactivity between bacterial and human heat-shock proteins induced at the site of inflammation may underlie the pathogenesis of some forms of arthritis. in order to test this hypothesis, we raised and cloned a yersinia-specific t cell line from the synovial fluid l ... | 1991 | 1909642 |
| [antibacterial and therapeutic effectiveness of a pectin from sea grass zostera]. | the kinetics of the antibacterial activity of zosterin, a polysaccharide preparation of a sea grass belonging to zoster, was studied. by its chemical structure zosterin is a low ++methoxylated pectin. in vitro the preparation markedly inhibited the growth of ++gram-negative and ++gram-positive organisms: s. aureus, e. coli, y. pseudotuberculosis, s. typhimurium and ps. aeruginosa. on a model of experimental pseudotuberculosis++ infection caused by oral contamination of mice f1 (cba x c57b1) with ... | 1991 | 1909858 |
| survival of yersinia enterocolitica and escherichia coli in spring water. | survival of pure and mixed cultures of yersinia enterocolitica and escherichia coli in sterile spring water stored at 4 degrees c was evaluated. y. enterocolitica increased two or three logs during the first 3 weeks of incubation, and at the end of 64 weeks viable cells in numbers corresponding to the initial inoculum level were still detectable. however, after 1 week of incubation, the number of e. coli in water started to decrease and in 13 weeks time no e. coli was detected. more rapid decrea ... | 1991 | 1911089 |
| effects of organophosphorus insecticides: effects of trichlorfon and dichlorvos on the immune response of carp (cyprinus carpio). iii. in vitro effects on lymphocyte proliferation and phagocytosis and in vivo effects on humoral response. | cells isolated from the pronephros of carp were incubated in vitro with the organophosphorus insecticide trichlorfon or dichlorvos, each of which is used in aquaculture to eliminate fish ectoparasites. dose-dependent suppressive effects were observed in assays for lymphocyte proliferation and myeloid cell respiratory burst activities. dichlorvos given by bath in vivo did not affect antibody production against yersinia ruckeri even if the spleen and kidney were obviously contaminated according to ... | 1991 | 1914997 |
| detection of subacute infectious foci with indium-111-labeled autologous leukocytes and indium-111-labeled human nonspecific immunoglobulin g: a prospective comparative study. | in 35 patients suspected of an infectious focus, the outcome of scintigraphy with 111in-labeled autologous leukocytes (wbc) and 111in-labeled human nonspecific immunoglobulin g (igg) was evaluated in a prospective comparative study. clinical, roentgenologic and microbiologic findings were considered to be proof of the presence of infection or inflammation. in this group of patients with mainly subacute infections, 111in-igg scintigraphy performed significantly better than 111in-wbc scintigraphy, ... | 1991 | 1919722 |
| experimental infection of domestic ferrets (mustela putorius furo) and siberian polecats (mustela eversmanni) with yersinia pestis. | eight domestic ferrets (mustela putorius furo) and two siberian polecats (m. eversmanni) were inoculated subcutaneously with 12 to 1.2 x 10(7) yersinia pestis originally isolated during an epizootic of plague in white-tailed prairie dogs (cynomys leucurus) near meeteetse, park county, wyoming (usa) in 1985. none of the ferrets or polecats developed clinical signs of disease which suggested that black-footed ferrets (m. nigripes), a congener, also would be resistant to plague. all animals receivi ... | 1991 | 1920664 |
| yersinia infected blood. | | 1991 | 1923099 |
| [approach to evaluation of the indicators of yersinia infections in reactive and rheumatoid arthritis]. | a total of 140 patients with reactive arthritis due to yersinia infection were under observation for 2-10 years. a group of 104 patients with erosive rheumatoid arthritis served as control for analysis of the results of bacteriological and serological studies. the bacteriological analysis of the feces, urine, smears of the feces and blood were made repeatedly. as established the articular syndrome in reactive arthrosis has its specific features depending on the nature of the pathological process ... | 1991 | 1925260 |
| yersinia pseudotuberculosis in a persian cat. | | 1991 | 1926722 |
| wild animals as the source of infection with yersinia pseudotuberculosis in shimane prefecture, japan. | | 1991 | 1935073 |
| evaluation of methods for examination of antibody response after infection with yersinia enterocolitica o:3. | | 1991 | 1935074 |
| yersinia enterocolitica surveillance in belgium (1979-1989). | | 1991 | 1935075 |
| immune response to flagellar antigens in human infections with yersinia enterocolitica. | | 1991 | 1935076 |
| immunoglobulin isotypes produced by mice experimentally infected with yersinia sp. | | 1991 | 1935077 |
| yersinia enterocolitica: antigenic components with diagnostic potential. | | 1991 | 1935078 |
| the v antigen of yersiniae: an overview. | | 1991 | 1935079 |
| renal insufficiency in mice experimentally infected with yersinia pseudotuberculosis. | | 1991 | 1935080 |
| colonization of yersinia enterocolitica serovar o3 in the intestines of mice. | | 1991 | 1935081 |
| experimental infection of mice with yersinia strains bearing or not bearing the virulence-associated plasmid. | | 1991 | 1935082 |
| uptake of killed yersinia enterocolitica cells by epithelial cells in the peyer's patches of mice. | | 1991 | 1935083 |
| comparative evaluation of various media for the detection of pathogenic yersinia enterocolitica. | | 1991 | 1935084 |
| development of antisera to detect virulent yersinia enterocolitica, shigella and escherichia coli enteroinvasive. | | 1991 | 1935085 |
| the epidemiology of yersinia enterocolitica infection in the british isles 1983-1988. | | 1991 | 1935086 |
| adhesion of yersiniae to rabbit intestinal constituents: role of outer membrane protein yada and modulation by intestinal mucus. | | 1991 | 1935087 |
| expression of the virulence plasmid-determined protein yop1 and hela cell invasiveness of yersinia enterocolitica o:3. | | 1991 | 1935088 |
| phenotypic characterization and virulence of o8 yersinia strains isolated in europe. | | 1991 | 1935089 |
| chromosomal marker for the 'high pathogenicity' phenotype in yersinia. | | 1991 | 1935090 |
| molecular cloning of yersinia enterocolitica o:3 rfb region: evidence that temperature regulates the rfb region at the transcriptional level. | | 1991 | 1935091 |
| molecular biology of yersinia pseudotuberculosis large plasmid pvm82. | | 1991 | 1935092 |
| plasmid-mediated characteristics of yersinia pseudotuberculosis strains isolated in italy from humans, cattle and swine. | | 1991 | 1935093 |
| preparation of monoclonal antibody to v antigen from yersinia pestis. | | 1991 | 1935094 |
| persistent survival of attenuated yersinia pestis organisms with coexistence of chondroitin sulfate colloidal iron within guinea pig macrophages as an initial step of the induction of potent antiplague immunogenesis. | | 1991 | 1935095 |
| beta-lactamases of strains of yersinia enterocolitica biovar 6 isolated from foods. | | 1991 | 1935096 |
| antimicrobial susceptibility of pathogenic yersinia enterocolitica strains in the british isles. | | 1991 | 1935097 |
| isolation of yersinia from the resected appendix. | | 1991 | 1935098 |
| comparative isolation of yersinia spp. from avian wildlife by different methods. | | 1991 | 1935099 |
| yersinia enterocolitica bacteremia: an analysis of thirty-six patients in denmark and a review of the literature. | | 1991 | 1935100 |
| yersinia enterocolitica and other enteric pathogens in patients with suspected appendicitis. | | 1991 | 1935101 |
| new observations on acute and chronic disease associated with yersinia enterocolitica infection. a 10-year follow-up study on 458 hospitalized patients. | | 1991 | 1935102 |
| yersiniosis in children: diagnostics and clinical manifestations. | | 1991 | 1935103 |
| isolation of yersinia from appendices of patients with acute appendicitis. | | 1991 | 1935104 |
| invasive disease due to yersinia enterocolitica in children with beta-thalassemia major. | | 1991 | 1935105 |
| cases of yersinia pseudotuberculosis infection having diagnostic criteria of kawasaki disease. | | 1991 | 1935106 |
| several aspects of yersinia pseudotuberculosis infection in children. | | 1991 | 1935107 |
| renal complications of yersinia pseudotuberculosis infection in children. | | 1991 | 1935108 |
| yersinia pseudotuberculosis infection in the mountain area. | | 1991 | 1935109 |
| yersinia enterocolitica o:3 antibodies in slaughterhouse employees, veterinarians, and military recruits. occupational exposure to pigs as a risk factor for yersiniosis. | | 1991 | 1935110 |
| isolation of yersiniae from sewage. | | 1991 | 1935111 |
| urease-negative strains of yersinia enterocolitica and related species isolated from human and nonhuman sources. | | 1991 | 1935112 |
| yersinia pseudotuberculosis infection in children due to untreated drinking water. | | 1991 | 1935113 |
| direct isolation of yersinia enterocolitica from stool specimens of patients with intestinal disorders. | | 1991 | 1935114 |
| occurrence of yersinia enterocolitica in pork products from northern taiwan. | | 1991 | 1935115 |
| colonization in the tonsils of swine by yersinia enterocolitica. | | 1991 | 1935116 |
| comparison of plasmid dna among different serogroups of yersinia pseudotuberculosis. | | 1991 | 1935117 |
| enteropathogenic yersinia enterocolitica and organ-specific autoimmune diseases in man. | | 1991 | 1935118 |
| a molecular basis for antigen homologies of thyroid epithelial cells and plasmid-encoded proteins of enteropathogenic yersinia enterocolitica. | | 1991 | 1935119 |
| immunoblot analysis of antibody response to yersinia enterocolitica in patients with reactive arthritis and enterocolitis. | | 1991 | 1935120 |
| cross-reacting protein antigen of yersinia enterocolitica is a heat shock protein. | | 1991 | 1935121 |
| the serological relationship between yersinia enterocolitica o9 and escherichia coli o157 using sera from patients with yersiniosis and haemolytic uraemic syndrome. | sera from patients with yersiniosis, shown to contain antibodies to yersinia enterocolitica o9; and sera from patients with haemolytic uraemic syndrome (hus) caused by escherichia coli o157, were used to investigate serological cross-reactions between y. enterocolitica o9 and e. coli o157. lipopolysaccharide (lps) was isolated from strains of y. enterocolitica o9 and e. coli o157 and reacted with sera by immunoblotting and elisa. sera from patients with hus contained antibodies to the lps of e. ... | 1991 | 1936156 |
| intracellular targeting of the yersinia yope cytotoxin in mammalian cells induces actin microfilament disruption. | pathogenic yersinia spp., including the etiological agent of plague, y. pestis, all carry a common plasmid that encodes a number of essential virulence determinants, the yop proteins. one of these, yope, has been shown to be involved in the obstruction of the primary host defense by a molecular mechanism leading to inhibition of phagocytosis (r. rosqvist, a. forsberg, m. rimpiläinen, t. bergman, and h. wolf-watz, mol. microbiol. 4:657-667, 1990). although the yop proteins are secreted into the c ... | 1991 | 1937815 |
| the cell cycle-regulated flagellar gene flbf of caulobacter crescentus is homologous to a virulence locus (lcrd) of yersinia pestis. | we have characterized flbf, a key locus located at the top of the flagellar gene hierarchy of caulobacter crescentus. this gene is required for transcription from sigma 54 promoters of fla genes expressed late in the cell cycle. we have determined the nucleotide sequence of the gene, mapped the 5' end of the flbf rna, and examined the pattern of expression in the cell cycle. our results show that flbf is expressed earlier in the cell cycle than other fla genes, that it is expressed at a low leve ... | 1991 | 1938923 |
| convenient agarose medium for simultaneous determination of the low-calcium response and congo red binding by virulent strains of yersinia enterocolitica. | a simple, efficient method for identification and differentiation of yersinia enterocolitica containing virulent plasmid-bearing clones is described. the method is based on temperature of incubation and the low calcium response of the organism in an agarose congo red medium. | 1991 | 1939595 |
| long-term yersiniosis surveillance project in czechoslovakia. | the paper presents an epidemiological analysis of 8,232 cases of yersiniosis caused by y. enterocolitica 03 over 1972-1988 as reported by hygienic stations. the steady epidemiological characteristics of yersiniosis were the prevalence of children and boys and a typical seasonal pattern with differences between the czech and slovak republics. in the czech republic, there were several incidence peaks following, when summarized, the incidence curve of other alimentary infections, whereas in the slo ... | 1991 | 1940332 |
| expression in vivo of additional plasmid-mediated proteins during intestinal infection with yersinia enterocolitica serotype o8. | the decisive aspect of yersinia enterocolitica virulence in vivo is the ability of the plasmid-bearing bacteria to resist the immune response within the host tissue. the expression of plasmid-mediated virulence proteins was investigated in the intestinal lumen and in the peyer's patches of infected mice. three novel plasmid-mediated outer-membrane proteins have been identified with antisera raised against bacteria grown in vivo. when the bacteria were grown in the intestinal lumen, all plasmid-c ... | 1991 | 1941997 |
| [yersiniosis in a general hospital in the basque country (1984-1989). clinical and epidemiological aspects]. | the features of the diseases caused by yersinia have not been properly evaluated in the basque country. the present study was performed to assess the incidence and consequences of this infection. | 1991 | 1943291 |
| [yersiniosis]. | | 1991 | 1943295 |
| purification and partial characterization of a soluble hemagglutinin from yersinia pseudotuberculosis. | a soluble hemagglutinin (ha) produced by yersinia pseudotuberculosis strain inoue, serotype 5b, was purified by ammonium sulfate precipitation, gel filtration on sepharose cl-6b and high performance liquid chromatography on a deae-5pw anion-exchange column. the purified ha was a 14.5 kda protein with an isoelectric point of 4.5. amino acid analysis indicated that the ha consisted of 133 residues, corresponding to the molecular weight of 14,100. the amino acid sequence of n-terminal 38 amino acid ... | 1991 | 1943846 |
| [yersinia enterocolitica and the thyroid gland]. | | 1991 | 1946302 |
| fatal yersinia enterocolitica (serotype 0:5,27) sepsis after blood transfusion. | septicemia is a rare complication of blood transfusion. this is probably primarily due to the use of sealed disposable containers for blood collection and the storage of red cell-containing components at 4 degrees c. however, despite these measures, septicemia due to blood transfusion continues to occur. we report here a fatal case of yersinia enterocolitica septicemia due to a contaminated unit of red cells which was collected from an apparently healthy, asymptomatic blood donor. the organism g ... | 1991 | 1949705 |
| [the boosting of yersinia enterocolitica virulence during passage through infusorians and mammalian macrophages (comparative research)]. | selective changes in y. enterocolitica virulence have been made in experiments on eukaryotic cells, infusoria, and peritoneal macrophages, used as models. in parallel experiments with the passage of yersinia through infusoria and mammalian macrophages an analogy to the processes of phagocytosis has been established. | 1991 | 1950257 |
| [the immunoenzyme analysis of ceruloplasmin]. | a highly specific and sensitive enzyme immunoassay (eia) system, suitable for the qualitative analysis of ceruloplasmin, has been developed. the possibility of its use for the examination of children with mononucleosis and pseudotuberculosis has been studied. an increase in the concentration of ceruloplasmin has been more pronounced in infectious mononucleosis (0.506 +/- 0.026 g/l) and pseudotuberculosis (0.421 +/- 0.157 g/l). the results of eia coincided with the data obtained by radial immunod ... | 1991 | 1950269 |
| [the detection of human pseudotuberculosis cases in volyn province from 1975 to 1989]. | | 1991 | 1950294 |
| failure of beta-lactam antibiotics and marked efficacy of fluoroquinolones in treatment of murine yersinia pseudotuberculosis infection. | the treatment of yersiniosis by beta-lactams is questionable considering the proven failure of newer beta-lactams for treating murine yersinia enterocolitica infection. another modality of experimental treatment was performed with a virulent strain of y. pseudotuberculosis (nonproducer of beta-lactamase) highly susceptible (in terms of mics) to amoxicillin, cefotaxime, ceftriaxone, imipenem, doxycycline, gentamicin, and ofloxacin. the in vivo comparative efficacy of these drugs was evaluated in ... | 1991 | 1952849 |
| [various properties of rifr mutants of the plague agent]. | the properties of the rifr mutants of four vaccinal and two natural strains of the plague bacillus were studied. the frequency of the mutants not growing on the complete nutrient medium after increasing the cultivation temperature to 37 degrees c averaged to 3.10(-1). the frequency of the loss of every of the three known autonomous plasmids or combinations of the 6-md and 65-md plasmids was n.10(-1). in the mutants of some strains with the preserved 47-md plasmid sensitivity to the ca2+ deficien ... | 1991 | 1953182 |
| effects of yersinia enterocolitica infection on rabbit intestinal and colonic goblet cells and mucin: morphometrics, histochemistry, and biochemistry. | the effects of yersinia enterocolitica on intestinal goblet cells were investigated in new zealand white rabbits. animals infected with y enterocolitica were compared with weight matched and pair fed controls. goblet cell hyperplasia developed in the distal small intestine of infected rabbits on day 1, in the mid small intestine on day 3, and in the upper small intestine on day 6. in all regions hyperplasia persisted throughout the 14 day study. the degree of hyperplasia was greater in the dista ... | 1991 | 1955167 |
| enteric infections associated with exposure to animals or animal products. | the epidemiology and clinical presentation of enteric infections are discussed in this article. these include bacterial, viral, and parasitic illnesses, and are associated with the increasing popularity of drinking unpasteurized milk; eating raw fish and shellfish; consuming undercooked pork, poultry, and eggs; and having contact with pets. salmonella, campylobacter jejuni, vibrio, yersinia, aeromonas, edwardsiella, hepatitis a virus, norwalk virus, anisakis, eustrongylides, diphyllobothrium, na ... | 1991 | 1955706 |
| salmonella-specific antibodies in reactive arthritis. | the development and persistence of salmonella-specific serum antibodies of different immunoglobulin classes and subclasses were compared between those who developed reactive arthritis (n = 39) and those who did not (n = 58) after salmonella infection. antibodies against lipopolysaccharide and sds-extract antigen were measured by elisa. a significant difference was seen between the two patient groups after 4-14 months of follow-up; those with reactive arthritis had higher levels of salmonella-spe ... | 1991 | 1955713 |
| ymoa, a yersinia enterocolitica chromosomal gene modulating the expression of virulence functions. | the virulence functions of yersinia enterocolitica include the pyv-encoded yop proteins and yada adhesin as well as the chromosome-encoded enterotoxin, yst. the yop and yada genes form a temperature-activated regulon controlled by the transcriptional activator virf. gene virf, also localized on pyv, is itself thermoinduced in the absence of other pyv genes. the enterotoxin yst gene is silent in some collection strains including strain w22703. this paper describes two tn5-tc1 chromosomal insertio ... | 1991 | 1956283 |
| [bacterial ileocecitis, a "new" disease]. | 786 patients with suspected acute appendicitis or appendiceal mass were examined by ultrasonography to distinguish appendicitis from bacterial enteritis. 533 of these patients were described before. in 91 (11.6%) ultrasonography revealed the characteristic picture associated with bacterial enteritis of the ileocaecal region-enlarged mesenteric lymph nodes and mural thickening of the terminal ileum and caecum--but no image of an inflamed appendix. in 64 of these a bacterial infection was confirme ... | 1991 | 1956444 |
| [histiocytic necrotizing lymphadenitis; kikuchi's disease]. | | 1991 | 1956451 |
| [yersinia enterocolitica infections; clinical and histological characteristics, diagnosis and therapy]. | | 1991 | 1956456 |
| [clinical findings and diagnosis of yersinia enterocolitica infections; a retrospective study in friesland]. | the clinical data of 97 patients with yersinia enterocolitica infection during 1989 were evaluated. the diagnosis was made by positive culture, serology and/or detection of yersinia antigens in biopsies. the enteric form (enteritis, abdominal syndrome, pseudo-appendicitis, ileitis and colitis) occurred in 66% of all patients, 10 (10%) had an extramesenteric form, 22 had arthritis and 6 had erythema nodosum. the mean age was 33.6 (sd 19.4) years. abdominal pain was the syndrome most frequently ob ... | 1991 | 1956458 |
| enterotoxin-producing bacteria isolated from swedish travellers with diarrhoea. | the isolation rate of bacterial enteropathogens of different species, particularly enterotoxin-producing gram-negative bacteria, was determined in stool specimens from swedish travellers with diarrhoea. overall, bacterial enteropathogens were identified in 101 (47%) of the 217 travellers on their return home. the most common isolates were enterotoxin-producing bacteria (20%), salmonellae (18%) and campylobacter (8%), whereas shigellae (3%) and yersinia (0.5%) were rarely identified. mixed infect ... | 1991 | 1957131 |
| late complications after a yersinia enterocolitica epidemic: a follow up study. | ninety four finnish conscripts were affected by a yersinia enterocolitica epidemic in 1973. thirteen years later 75 men completed a questionnaire about their present health. one half had no health problems, and the most common complaints in the other subjects were musculoskeletal disorders. sixteen men wanted to be re-examined. in three cases a chronic connective tissue disease was diagnosed. two men had ankylosing spondylitis. the most notable results of this study were (a) the fairly low numbe ... | 1991 | 1958092 |
| monoclonal antibodies against yersinia enterocolitica common antigen produced by immunization with immunoprecipitates. | crossed immunoelectrophoresis was applied to purify y. enterocolitica common antigen by precipitation with monospecific rabbit anti-p. aeruginosa ca antibody. monoclonal antibodies against y. enterocolitica ca were then raised by immunization of mice with these immunoprecipitates. this method provides the possibility of producing a panel of anti-ca monoclonal antibodies from a large number of bacterial species. | 1991 | 1958353 |
| integration of the plasmid encoding the synthesis of capsular antigen and murine toxin into yersinia pestis chromosome. | yersinia pestis, the causative agent of plague, usually carries three plasmids. the largest of them, a 60 megadalton (mda) replicon designated pfra determines the synthesis of capsular antigen (fraction i) and murine toxin. both products are involved in the expression of virulence. previously, several cases of integration into the bacterial chromosome of the calcium dependence plasmid common to pathogenic yersinia species have been described. in this study, using the southern hybridization metho ... | 1991 | 1961108 |
| pyomyositis in patients with diabetes mellitus. | pyomyositis is a pyogenic infection of skeletal muscle that is endemic in the tropics and is being recognized with increasing frequency in temperate climates. we report two cases of nonendemic pyomyositis in patients with diabetes mellitus. a review of the literature suggests that diabetes mellitus may be an important risk factor for the development of pyomyositis. possible mechanisms of this association are discussed. | 1991 | 1962087 |
| [the biological action of yersinia pseudotuberculosis endotoxin]. | experimental studies on guinea pigs have shown that y. pseudotuberculosis lipopolysaccharide is capable of inducing endotoxinemia accompanied by the development of the thrombohemorrhagic syndrome. in cases of pseudotuberculosis the importance of the increased synthesis of prostaglandins and cyclic nucleotides with the prevalence of pgf2 alpha and cgmp in the genesis of toxico-allergic manifestations of pathologic processes has been established. the pathomorphological picture of pseudotuberculosi ... | 1990 | 1963723 |
| [the protective properties of a porin from the outer membrane of yersinia pseudotuberculosis]. | the protective properties of the species-specific pore-forming polypeptide of y. pseudotuberculosis outer membrane (porin) were studied. the study showed that 80-90% of mice immunized with porin survived after challenge with 10-30 ld50 of y. pseudotuberculosis, serovars 1 and 3. the ld50 of the preparation exceeded its ed50 more than 100-fold. immunization made in two injections was more effective than immunization in one injection. the immunization of the animals with porin led to an increase i ... | 1990 | 1965874 |
| [the presence of the yersinia group in environmental factors, food and some animal species]. | in a broad bacteriologic investigation, including more than 3,000 examination of domestic animals (porcines, bovines), fish, food (milk, ice cream), surface waters and soil, 27 strains of yersinia enterocolitica were isolated. of them 22 belonged to the o3(-8); o5(-6); o5,7,8(-2); o6(-2); o7(-2); o9(-2) serotypes, and 5 could not be serotyped, but were included in the biotype i. the strains isolated from fish, food and environment had a biochemical and/or serologic behaviour similar to that usua ... | 1990 | 1966342 |
| [viral infections associated with intestinal invagination]. | intestinal invagination is rather frequently associated with local tumors, adenovirus infections, and occasionally with yersinia enterocolitica. however, in many cases the etiology is not known. we have studied 88 children with intestinal invagination in whom cellular cultures of hep 2 and pulmonary fibroblasts of human embryo have been inoculated with a fecal sample. the clinical reports have been reviewed retrospectively. in 19 patients (21.59%) we obtained an adenovirus and in 12 patients (13 ... | 1990 | 1967100 |
| [reactive arthritis following yersinia pseudotuberculosis infection]. | a patient developed reactive arthritis due to yersinia pseudotuberculosis. five months after the primary infection, the patient still suffered from severe oligoarthritis. the administration of steroids and sulphasalazine had very little effect upon the development of the disease. | 1990 | 1968686 |
| [the peptidase activity of a cellular extract of the causative agent of plague]. | peptidase activity of yersinia pestis cell extract was studied by the hydrolysis of synthetic and some natural substrates, as well as the hydrolysis of fluorogenic aminopeptidase substrates. all peptides and fluorogenic substrates under test were split by y. pestis cell extract, the splitting of alanylaminopeptidase substrate being linked with at least two enzymes of this cell extract. | 1990 | 1973325 |
| [the phenomenon of pilus formation in the interaction of yersinia pestis with macrophages in experimental animals]. | according to the data of the enzyme immunoassay, adhesion pili were expressed by y. pestis cells eb76 after their cultivation in media with ph similar to that of phagolysosomes. the expression of adhesion pili was found to occur 18 hours after the contact of apiliate cells eb76 with a monolayer of native, but not inactivated (at 56 degrees c for 30 minutes) macrophages of the peritoneal exudate of white mice and guinea pigs. purified adhesion pili possessed cytotoxic action and inhibited the dig ... | 1990 | 1973326 |