in this study 130 bulk tank milk samples which were delivered to the pegah pasturisation factory inmashhad were collected randomly during the summer months. samples were firstly enriched in modifiedtrypticase soy broth containing novobiocin, followed by plating onto sorbitol macconkey agar supplementedwith cefixime and potassium tellurite for isolation of escherichia coli o157:h7. consequently ...

escherichia coli (e. coli) is a normal inhabitant of the gastrointestinal tract of vertebrates, including humans. phylogenetic analysis has shown that e. coli is composed of four main phylogenetic groups (a, b1, b2 and d). group a and b1 are generally associated with commensals, whereas group b2 is associated with extra-intestinal pathotypes. most enteropathogenic isolates, however, are assigne...

infectious diseases are responsible for thousands of worldwide early death .many commercial antibiotics have been used to control human's infectious diseases all over the world. calotropis procera linn a wild growing plant of asclepiadaecae family is known to possess multifarious medicinal properties. total 80 non repetitive clinical e. coli strains recovered during 7 month, and were screened f...

background uropathogenic escherichia coli (upec) is a causative agent of most of urinary tract infections (utis), which expresses a multitude of virulence factors. objectives the aim of this study was to investigate virulence associated characteristics characteristics in upec isolates derived from urine specimens, and to investigate the distribution of the pathogenicity islands virulence marker...

background : enteroaggregative e. coli (eaec) is increasingly recognized as a cause of often persistent diarrhea in children and adults in both developing and developed countries. the aim of the present study was to investigate the presence and the frequency of eaec as etiologic agent of diarrhea in shiraz. methods : a total of 715 stool samples were collected from patients with diarrhea in shi...

background: the current study aimed to determine the effect and properties of surface-modified copper doped cu:zno nps on killing curves of bacterial pathogens. m ethods:   preparation  of   in  situ   surface-modified  copper  doped  zno nanoparticles (cu:zno nps) was done according to standard procedure.assay for antimicrobial activity of cu:zno nps against bacterial pathogens was carried out...