Genes required for the full expression of Shigella virulence are on both the chromosome and a large virulence-associated plasmid. Expression of one or more virulence (vir) genes is temperature-regulated, wild-type strains being virulent (invasive) when grown at 37 degrees C but phenotypically avirulent (noninvasive) at 30 degrees C. A vir::lac operon fusion located on the virulence plasmid, whi...

conclusions these findings illustrated the presence and persistence of clonal groups of mrsa strains, in chicken meat in isfahan, iran, that serve as reservoirs to disseminate bacteriophage encoded enterotoxin and virulence agents. results all 116 isolated mrsa strains were discriminated into seven php types consisting of seven common types (cts) and were positive for meca gene. all isolates ha...

Background and Objective: Helicobacter Pylori (H. pylori) is one of the reasons for the gastric inflammation and peptic ulcers. It is a predisposing factor of gastric adenocarcinoma. Cytotoxin A encoded by the cagA gene is one of the major virulence factors in bacterial pathogenicity, which is of special importance due to genetic diversity in different geographical areas. The purpose of this st...

Backgorund: Bacteriophages are closely related to the evolution and virulence of some important bacterial pathogens. Due their highly significant roles in pathogenesis virulence, S. aureus bacteriophages frequently studied. grouped into two main categories depending on life cycles. There consistently lytic phages (virulent) temperate phages. This study aimed isolate determine phage serogroups f...

Improving sorghum resistance is a sustainable method to reduce yield losses due anthracnose, devastating disease caused by Colletotrichum sublineola . Elucidating the molecular mechanisms of sorghum– C. interactions would help identify biomarkers for rapid and efficient identification novel sources host-plant improvement, understanding pathogen virulence, facilitating breeding. Despite concerte...

Quorum sensing (QS) is a process that enables bacteria to communicate using secreted small pheromone-like signaling molecules called autoinducers (AIs). This population of regulate gene expression collectively. These quorum systems regulates biofilm formation, virulence factors expression, bioluminescence, motility patterns, exopolysaccharide production, antifungal or antibiotic endoglucanase p...

This study determined the genetic background of virulence and resistance genes of MRSA ST398 in Austria. From 2004 up to 2008 a total of 41 human isolates of MRSA ST398 were investigated for virulence and resistance gene patterns using DNA microarray chip analysis. Highly similar virulence gene profiles were found in 29 (70·7%) of the isolates but genes encoding Panton-Valentine leukocidin, ent...

In this study, we characterized a putative Flp/Tad pilus-encoding gene cluster, and we examined its regulation at the transcriptional level and its role in the virulence of potato pathogenic enterobacteria of the genus Pectobacterium. The Flp/Tad pilus-encoding gene clusters in Pectobacterium atrosepticum, Pectobacterium wasabiae and Pectobacterium aroidearum were compared to previously charact...

The aim of this study was to perform a current molecular characterization of bovine pathogenic Escherichia coli strains isolated from random samplings in Argentinean dairy farms. Rectal swabs were obtained from 395 (63.7%) healthy and 225 (36.3%) diarrheic calves, belonging to 45 dairy farms in Cordoba Province, Argentina. E. coli isolates were examined for virulence genes (f5, f41, f17, sta, s...