Background: Escherichia coli (E. coli) remains one of the leading agents of urinary tract infection (UTIs), it has become resistant to many drugs. Current work aimed to evaluate some chemical substances as antibacterial agents and molecular study of virulence factors associated with UTIs. Methods: This work involved 133 urine specimens obtained from females’ patients suffering from UTIs, Met...

background and aims: the aim of this study was to determine the virulence and antibiotic resistance properties of streptococcus agalactiae (s. agalactiae) and streptococcus uberis (s. uberis) isolated from the ruminant’s sub-clinical mastitic milk in iran. materials and methods: positive samples in the cmt test were cultured and s. agalactiae and s. uberis have been identified using biochemical...

Background: Foodborne outbreaks associated with shiga toxin-producing Escherichia coli (STEC) have been well documented worldwide. STECs are major causative agents of gastroenteritis in humans that may be complicated by hemorrhagic colitis (HC), hemolytic uremic syndrome (HUS), and thrombotic thrombocytopenia purpura (TTP). OBJECTIVES: The aim of this study was to investigate the presence of vi...

conclusions results of the present study showed that the tst and sea genes had high frequencies among the mrsa isolates. the increased prevalence of mrsa isolates containing different virulence genes, probably accompanied by antimicrobial resistance, can complicate the therapy of mrsa isolates. results all the tested isolates were susceptible to vancomycin, but resistant to penicillin (100%), e...

pertussis is still endemic and the recently resurgence of the disease caused by bordetella pertussis has been shown in many countries. the polymorphism of the virulence genes of b. pertussis and lack of any information about the allelic variation between the iranian isolates promotes us to analysis of the genes encoded virulence factors including ptxs1, prn, fim3 and cya to understand the diffe...

The current study was aimed to investigate the prevalence of ureC, rsbA, zapA and mrpA virulence genes using polymerase chain reaction (PCR) in Proteus spp. isolated from 5 commercially popular species of pet turtles and comparison of the mrpA gene sequences of Proteus mirabilis isolates with human clinical isolates. A total of 24 isolates in pet turtles were identified, comprised of P. mirabil...

the main features of enteroaggregative escherichia coli (eaec) pathogenesis include attachment of bacteria to the intestinal mucosa, production of various toxins and cytotoxins, and stimulation of mucosal inflammation. ‘virulence’ genes encode these features. comparison of different eaec isolates has shown that the virulence gene content of these isolates varies considerably. the heterogeneity ...