background:isolates of staphylococcus aureus express a myriad of adhesive surface proteins that play important role in colonization of the bacteria on nasal and skin surfaces, beginning the process of pathogenesis. the aim of this study was to screen several of the microbial surface components recognizing adhesive matrix molecules (mscramms) genes among the isolate of s. aureus from hospitalize...

in this study, 72 enterococcus faecalis isolates originating from humans (n=39), dogs (n=26) and cats (n=7) were investigated for some virulence factors, some virulence genes, antibiotic resistance phenotypes, randomly amplified polymorphic dna-polymerase chain reaction (rapd-pcr) patterns and biofilm production. of the isolates, 31 (43.1%) were positive for gelatinase, 11 (15.3%) for aggregati...

introduction: despite high level of vaccination against pertussis‚ whooping cough has re-emerged as a health threat, especially in infants. this could be related to expansion of bordetella pertussis with novel alleles for virulence factors including the pertussis toxin promoter, ptxp3. compared to ptxp1 strains‚ ptxp3 strains produce more pertussis toxin which results in immune suppression and ...

background the most common hospital-acquired pathogen is pseudomonas aeruginosa. it is a multidrug resistant bacterium causing systemic infections. objectives the present study was carried out in order to investigate the distribution of virulence factors and antibiotic resistance properties of pseudomonas aeruginosa isolated from various types of hospital infections in iran. patients and method...

conclusions sphingomonas paucimobilis can cause serious infections, especially in immunocompromised patients with determined risk factors such as indwelling catheters and diabetes mellitus, due to the effects of multiple virulence factors, together with biofilm formation. results all the clinical isolates of s. paucimobilis produced biofilms. primary bacteraemia (n = 16) was the most common cli...

To isolate and detect anthrax spores form soil in different regions of Iran in order to find the anthrax foci‚ a total of 668 environmental specimens were collected during 2003-2004. Bacterial endospores were extracted from soil specimens via flotation in distilled water, incubation at room temperature, filtration, heat shock and culture on blood agar and selective PLET media. Bacillus anthraci...

The aim of this study was to isolate Escherichia coli from chickens and to determine the presence of the eaeA gene, a virulence factor detected in Escherichia coli, in the isolates by polymerase chain reaction (PCR). Different chicken organs (lung, liver and spleen) were inoculated onto blood agar and biochemical tests were performed on the suspicious isolates. Escherichiacoliwas isolated from ...

Enterotoxigenic Escherichia coli (ETEC) produces different virulence factors allowing the bacterium to colonize and develop watery diarrhea. Proteomics studies have also introduced new protein belonging to the secretion pathways, antigen 43 (Ag43), which plays important role in E. coli pathogenesis. The objective of this study was to investigate O-types and virulence factors o...

background shiga toxin-producing escherichia coli (stec) strains are considered as one of the most important widespread food-borne pathogens, which cause diarrhea and life threatening diseases, such as hemolytic uremic syndrome, in humans. more recently, the stec strains have also been incriminated to cause diarrhea and hemorrhagic colitis in calves; enteropathogenic e. coli (epec) also causes ...

genetic structure and pathogenic diversity of sclerotinia sclerotiorum, the causal agent of canola white stem rot, were assessed through mycalial compatibility groupings (mcgs), a comparison and comparing of isolate virulence. fifty-seven isolates from three different regions in golestan province were selected for mycelial compatibility and as well for virulence tests. within the 57 tested isol...