The issue of identification and differentiation of large group of bacteriophages of human pathogenic vibrio is still unresolved. In research and practical applied purposes it is important to consider characteristics of bacteriophages for establishing similarity and differences between them. The actual study was carried out to analyze specimens of DNA-containing bacteriophages of pathogenic vibrio.
View Article and Find Full Text PDFZh Mikrobiol Epidemiol Immunobiol
November 2014
Aim: Comparative evaluation of biological properties of parahemolytic vibrios that had determined outbreaks and sporadic cases of food toxic infection in Primorsky Region in 2012 and previous years. Materials AND METHODS: 40 clinical strains of Vibrio parahaemolyticus isolated in 2012 were studied in comparison with 62 strains from this region that had been characterized by us previously. Virulence was evaluated by a complex method: hemolytic activitywas determined in Kanagawa test (KT), urease - in Kristensen medium.
View Article and Find Full Text PDFThe sample included five indicator pseudotuberculosis strains. The application of these strains permitted to isolate out of 161 strains of Y. pseudotuberculosis 9 bacteriophages identical by their morphologic and serologic characteristics but having individual particularities in their lytic activity.
View Article and Find Full Text PDFLysogeny was studied in Vibrio mimicus; the indicator V. cholerae El Tor strain was selected to identify phages. New V.
View Article and Find Full Text PDFFive indicator strains of Yersinia enterocolitica 01, 03, 05, 012 serovars were selected, which were used to isolate 7 bacteriophages from 227 Y. enterocolitica strains and 2 bacteriophages from wastewater samples. The specificity of the antigenic composition (3 serovars) and the morphology of phage particles (3 morphological groups) were employed to identify bacteriophages; there were differences in the range of lytic activity and resistance to physical and chemical agents.
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August 2005
The results of the serotyping of 244 V. cholerae non O1/O139 cultures isolated from patients in Uzbekistan in 2000 and 2001 are presented. All isolates were studied by the method of molecular probing and in the polymerase chain reaction for the presence of virulence genes and for sensitivity to phages ctx+, ctx- and hemolytic activity.
View Article and Find Full Text PDFThe dynamics of the isolation of V. cholerae cultures from various water objects on the territory of Rostov-on-Don during the period of 1994-2001 was analyzed and biological properties of 14 such cultures were studied. In the absence of epidemic complications during the above-mentioned period, a growth in the amount of V.
View Article and Find Full Text PDFA set of test-strains is suggested; it comprises V. eltor P-13169 and V. cholerae 163-0139 designed for the primary identification of unknown previously choleraic bacteriophages.
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June 2002
Information on V. cholerae eltor isolated in the focus of cholera in Kazan in 2001 at different periods of the outbreak is presented. The identity of strains isolated from patients, vibriocarriers and environmental objects, including their antibioticograms (sensitivity to cyprofloxacin and resistance to trimethoprim--sulfamethoxazole, streptomycin, furazolidone and nalidixic acid, which may be regarded as markers), is shown.
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May 2002
V. parahaemolyticus and V. alginolyticus strains isolated from patients during an outbreak of an acute enteric disease in Vladivostok in 1997 were studied.
View Article and Find Full Text PDFZh Mikrobiol Epidemiol Immunobiol
December 2001
The comparative evaluation of the diagnostic value of new cholera eltor bacteriophages ctx+ and ctx-, as well as monophages X[symbol: see text]-3, 4, 5, demonstrated their high activity and specificity. Using of these bacteriophages epidemic potential of 95% Vibrio cholerae eltor strains ctx+ and 84.5% of V.
View Article and Find Full Text PDFCholera bacteriophages have been isolated from 27 lysogenic cultures of V. cholerae O139. As shown the pages under study belong to two morphological groups A1 and F1 and serological types II and XII.
View Article and Find Full Text PDFConditions of cryostabilization of Yersinia pestis phages preserving their biological properties at very low temperature are studied.
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September 1997
The virulent properties of V. cholerae O1 (more than 1000 strains) were studied. For this purpose the following methods were used: the determination of hemolytic activity, the express method based on the determination of the speed of mannite oxidation, complex analysis and polymerase chain reaction (PCR).
View Article and Find Full Text PDFThe results of the phage typing of 164 halophilic vibrios revealed the most frequent combinations of lysing monophages, denoted by numbers: 1 (A, B, C, D), 2 (B, C, D), 3 (B, C) and 4 (C). In accordance with the proposed scheme, the phage typing of 398 cultures from different ecosystems was carried out. Phagovar was determined in 77.
View Article and Find Full Text PDFPhage resistance of 225 strains of cholera germs of O1 group obtained from different countries in 1988-1992 has been analyzed. Change of sensitivity to diagnostic phages was mostly connected with the decrease or loss of agglutinability in cholera sera. Phage resistance is rather conditioned by the change of the surface structures of the cell and by further change of phage reception zones.
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June 1995
Materials on the import of rarely occurring Vibrio cholerae, not belonging to group O1 of serovar O139, to the territory of Russia are presented. The clinical picture of a cholera case is described and the biological properties of V. cholerae, serovar O139, are presented.
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June 1995
A high degree of resistance to cholera diagnostic phages and carriership of prophages characteristic of V. cholerae eltor strains vct+ were shown to be the specific features V. cholerae isolated in Daghestan during the period of June-October 1994.
View Article and Find Full Text PDFCholeric phages were identified in 2 out of 44 samples of Donetsk sewage. Biological properties of phages were characterized.
View Article and Find Full Text PDFZh Mikrobiol Epidemiol Immunobiol
September 1994
The epidemic manifestations of cholera in the Ukraine and Moldova in 1970-1991 are analyzed. In the Ukraine the peak of cholera morbidity in 1970 was caused by infection brought to the ports of Odessa and Kerch with its subsequent spread to other territories. This infection was characterized by outbreaks transmitted through water, mainly sea water, with the isolation of Vibrio eltor toxigenic virulent strains and outbreaks of vibrio carriership of alimentary (dairy) origin with the isolation of avirulent strains.
View Article and Find Full Text PDFVibrio albensis phages have been found for the first time. Lysogenic strains of the luminescent vibrios are shown to be producers of moderate phages. The vibrios are attributed to the 1st morphological group according to A.
View Article and Find Full Text PDFLysogeny has been first established in strains of parahemolytic vibrios of serovar O4:K12. Moderate phages belonged to morphological group IV by home A. S.
View Article and Find Full Text PDF1. The effect of carbamazepine (CBZ) dose change on mean plasma concentrations of CBZ, its two metabolites and apparent steady-state clearance was studied in 77 affectively ill patients receiving CBZ at doses of 100-1200 mg day-1. 2.
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