Avian pathogenic Escherichia coli (APEC) is an economically important respiratory pathogen of chickens worldwide. Factors previously associated with the virulence of APEC include adhesins, iron-scavenging mechanisms, the production of colicin V (ColV), serum resistance, and temperature-sensitive hemagglutination, but virulence has generally been assessed by parenteral inoculation, which does no...

AIMS To investigate the distribution of the virulence of two Vibrio species among different strains obtained from the mariculture systems on the coast of Guangdong in China and the correlation between the virulence strains and the virulence genes among Vibrio alginolyticus. METHODS Besides three strains, 72 V. alginolyticus strains and seven Vibrio parahaemolyticus strains were examined by PC...

The high prevalence of methicillin-resistant Staphylococcus aureus (MRSA) ST398 among pigs in certain European countries and North America and its occurrence in other animal species raises a question concerning the molecular mechanisms mediating the success of this lineage. In this study a panel of S. aureus strains belonging to sequence type (ST) 5 (n = 4), ST8 (n = 5), ST15 (n = 5), ST22 (n =...

Ivory shell (Babylonia areolata) is a commercially important aquaculture species mainly found on the southeast coast of China. However, it has been greatly affected by vibriosis in recent years. In this study, FP17 (a potential pathogen) was isolated from dying ivory with “acute death syndrome” and confirmed as pathogen via infectious experiment. Furthermore, phylogenetic analysis based average...

objective: the aim of the this study was to investigate the prevalence of toxb, paa, lpf and iha adhesion genes in enteropathogenic escherichia coli (epec) isolates lacking in two important adhesion factors, the eaea and bfpa genes. methods: we examined a total of 70 serologically confirmed epec (eaea-, bfpa-) isolates. dna from the isolates was extracted by the phenol-chloroform method. toxb,...

pseudomonas aeruginosa as an opportunistic pathogen produces several virulence factors. the most important of these factors are exotoxin a and type iii secretion system (t3ss). the aim of this study was to determine the frequency of toxa, exou and exos genes among clinical isolates of p. aeruginosa. in this cross-sectional study from september 2011 to february 2012, 156 p. aeruginosa isolates w...

Objective(s): The present study investigated the prevalence of genes encoding for exotoxins, adhesion and biofilm factors in Staphylococcus aureus isolates obtained from samples in a referral burn hospital in Tehran, Iran.Materials and Methods: S. aureus isolates obtained from patients, personnel and surfaces in the wards of a burn hospi...

Background and aims: Salmonella spp. infect cold-blooded and warm-blooded animals and maycause a worldwide zoonotic disease, salmonellosis, in infected animals. Rodents can be Salmonellacarriers without any signs of salmonellosis. The frequency of salmonella contamination, the presence ofvirulence genes (SpvR and SpvB) and antibiotic resistance pattern of isolated Salmonella w...

Reflecting a complex set of interactions with its host, Salmonella spp. require multiple genes for full virulence. Many of these genes are found in 'pathogenicity islands' in the chromosome. Salmonella typhimurium possesses at least five such pathogenicity islands (SPI), which confer specific virulence traits and may have been acquired by horizontal transfer from other organisms. We highlight r...

The objectives of this study were to detect genes for virulence and bacteriocins in addition to studying the antimicrobial susceptibility of 78 strains of E. faecalis isolated from water wells for human consumption. The virulence and bacteriocin genes of 78 E. faecalis were amplified by PCR and visualized in agarose gels. The antimicrobial susceptibility was determined through diffusion agar te...