conclusions the observed results indicated the necessity of good care in abattoir, butcheries and during food distribution, mainly ground beef. also, a zero tolerance policy could be useful to control e. coli o157 in meat products nationwide. results overall, 1.5% of ground beef samples were contaminated with the o157 e. coli strain meanwhile 1% of samples contained the o157:h7 strain and 0.5% ...

conclusions the relative higher frequency of some virulence genes in this study may reflect the emergence of isolates containing these genes in shiraz medical centers. background staphylococcus aureus is amongst major human pathogens both in hospitals and the community. this bacterium is an opportunistic pathogen responsible for a large number of self-limiting and even life-threatening diseases...

helicobacter pylori infection is a common gastrointestinal infection that can cause pathological effects, increase oxidative stress and induce an inflammatory response in gastric mucosa. inflammatory aspects may prompt the production of radical oxygen substance (ros) which may damage cells and release 8-hydroxydyoxyguanosine (8-ohdg) to serum. in this study, we evaluate the prevalence of h. pyl...

Context: The unprecedented rise in antibiotic-resistant bacterial infections is a challenging dilemma, urging the development of novel and effective antibiotics for treatment such infections. Anti-virulence therapy promising solution this regard. Unlike antibiotics, these drugs could lower selective evolutionary pressure on population target virulence factor rather than growth pathways, thereby...

Bacterial pathogenicity and antibiotic resistance are of concern for environmental safety and public health. Accumulating evidence suggests that wastewater treatment plants (WWTPs) are as an important sink and source of pathogens and antibiotic resistance genes (ARGs). Virulence genes (encoding virulence factors) are good indicators for bacterial pathogenic potentials. To achieve a comprehensiv...

seventy poultry farms’ drinking water was tested for escherichia coli contamination in qom province iniran. the cases of colibacillosis from positive farms were also collected and tested. the isolates wereexamined for serotype, detection of virulence genes by multiplex pcr and antibiotic resistance. thirtypoultry farm water samples were e. coli positive (18.57%), although 13 e. coli isolates we...

The genus Streptomyces includes several phytopathogenic species that cause common scab, a devastating disease of tuber and root crops, in particular potato. diversity scab is unknown. Likewise, the genomic context necessary for bacteria to incite symptom development not fully characterized. Here, we phenotyped sequenced genomes five strains from poorly studied lineage. These form new species-le...

The association between Escherichia coli virulence factors and chronic intestinal disorders is mostly unknown. The presented study compared the distribution of virulence genes and phylogroups among E. coli isolated from chronic intestinal disorders such as Crohn's disease and irritable bowel syndrome (IBS) with strains isolated from patients with acute diarrhea as a control group. The presence ...

The occurrence and distribution of clinically relevant bacterial virulence genes across natural (non-human) environments is not well understood. We aimed to investigate the occurrence of homologs to bacterial human virulence genes in a variety of ecological niches to better understand the role of natural environments in the evolution of bacterial virulence. Twenty four bacterial virulence genes...