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Your search keyword '"Salmonella paratyphi B genetics"' showing total 3 results
Start Over Descriptor "Salmonella paratyphi B genetics" Language russian
3 results on '"Salmonella paratyphi B genetics"'

1. [The identification of salmonellae by means of a rapid polymerase chain reaction].

Author

Satorov S and Suvorov AN

Subjects
Base Sequence, DNA Primers, DNA, Bacterial genetics, Electrophoresis, Agar Gel, Humans, Molecular Sequence Data, Salmonella paratyphi A genetics, Salmonella paratyphi B genetics, Salmonella typhi genetics, Serotyping, Polymerase Chain Reaction methods, Salmonella paratyphi A classification, Salmonella paratyphi B classification, Salmonella typhi classification
Abstract

The results of the rapid method for the detection and identification of epidemically related and unrelated causative agents of Salmonella infections. To analyze the chromosomal DNA of these strains, rapid polymerase chain reaction (PCR) was used. The analysis of the electrophoregrams of products obtained in rapid PCR revealed that the number of DNA fragments is constant for the cultures of the concrete serovar or phagovar. Using rapid PCR, the detection of S. typhi atypical strains was succeeded.

Published
1997

2. [Conjugative R-plasmid resistance of Salmonella].

Author

Gridnev VA

Subjects
Animals, Conjugation, Genetic drug effects, Humans, Microbial Sensitivity Tests methods, Salmonella genetics, Salmonella paratyphi B drug effects, Salmonella paratyphi B genetics, Salmonella typhi drug effects, Salmonella typhi genetics, Salmonella typhimurium drug effects, Salmonella typhimurium genetics, Anti-Bacterial Agents pharmacology, R Factors drug effects, Salmonella drug effects
Abstract

A total of 4801 Salmonella strains of 67 serovars isolated from various sources in 1968-1982 were studied for their sensitivity to 12 drugs. The Salmonella strains of groups A, B, C, D and E amounted to 0.8, 84.6, 6.4, 5.8 and 2.0 per cent, respectively. The Salmonella strains of the other groups amounted to 0.4 per cent. During the 5-year periods, the number of the antibiotic resistant Salmonella strains increased from 57.7 to 93.4 per cent. The conjugative drug resistance was detected in 16 out of the 67 serovars. The Salmonella strains usually resistant to 4-10 drugs were the donors of this conjugative drug resistance. The strains of S. typhimurium responsible for the hospital infections were characterized by the highest levels of the antibiotic polyresistance and the greatest variety of the conjugative R plasmids. The structure of the multiple and conjugative drug resistance of the organisms causing salmonellosis was more frequently defined by the conjugative plasmids of the antibiotic resistance of the S. typhimurium serovar. The Salmonella R plasmids determined various levels of the antibiotic resistance. The highest resistance levels were observed to benzylpenicillin, chloramphenicol and erythromycin and the lowest resistance levels to tetracycline.

Published
1984

3. [Effect of conjugative R plasmids on the virulence of antibiotic-sensitive Salmonella strains and their streptomycin-resistant mutants].

Author

Gridnev VA and Livkina EG

Subjects
Animals, Drug Resistance, Microbial, Mice, Salmonella drug effects, Salmonella pathogenicity, Salmonella paratyphi B drug effects, Salmonella paratyphi B genetics, Salmonella paratyphi B pathogenicity, Salmonella typhimurium drug effects, Salmonella typhimurium genetics, Salmonella typhimurium pathogenicity, Virulence drug effects, Anti-Bacterial Agents pharmacology, Conjugation, Genetic drug effects, Mutation, R Factors drug effects, Salmonella genetics, Streptomycin antagonists & inhibitors
Abstract

The pathogenicity level of antibiotic sensitive and streptomycin resistant strains of S. typhimurium, S. paratyphi B and S. kottbus changed under the effect of identical R plasmids more frequently in contrary directions. The conjugative plasmids of antibiotic resistance widened the ranges of the virulence changes in the Salmonella serovars for albino mice. It was found that 7 out of 8 plasmids studied significantly decreased and increased the virulence of the antibiotic sensitive Salmonella strains. As a rule, R plasmids of various origin decreased the virulence of all the tested streptomycin chromosome resistant causative agents of salmonellosis.

Published
1983

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