In the present study, the effect of the high and low virulence S. iniae strains on oxidative activity and cytotoxic effects of trout spleen macrophages were studied. Spleen macrophages were collected from trout. Luminol was used as chemiluminigenic probe. Phorbolmyristate acetate (PMA) also was used as positive control activating agent of respiratory burst and significantly stimulated pr...

Avian pathogenic Escherichia coli (APEC) are responsible for wide ranges of extra-intestinal diseases in poultry including colibacillosis, cellulitis, coligranuloma and yolk sac infection. Numbers of virulence are considered important in the pathogenicity of these diseases. The aims of the present study were phylogenetic typing and virulence genes detection in Escherichia coli </em...

Brucellosis is a widespread zoonotic disease causing considerable economic and public health problems. Despite animal vaccination, brucellosis remains endemic in some areas such as Iran, especially in the western Iranian province of Hamadan. We sought to detect some of the most common virulence-associated genes in Brucella isolated from human blood cultures to determine the prevalence of some v...

conclusions by studying the profiles of virulence genes and mlva, it can be concluded that eiec isolates do not have high heterogeneity and are derived from a limited number of clones. background enteroinvasive escherichia coli (eiec) isolates cause dysentery in humans. several virulence factors associated with eiec pathogenesis have been characterized. multilocus variable-number tandem-repeat ...

Background: Avian pathogenic Escherichia coli (APEC), which is the causative agent of colibacillosis, harbors several putative virulence genes. An important trait of APEC for both poultry and public health is antibiotic resistance. Objectives: In the present study, some potential virulence genes of APECs isolated from Northeast of Iran and their resistance to the quinolones antibiotics were stu...

background and objectives: this study was designed to evaluate the activity of quercus infectoria galls extract (qifge) on virulence factor production and inhibition of quorum sensing (qs) in pseudomonas aeruginosa. materials and methods: minimum inhibitory concentration (mic) of qifge against 5 strains of p. aeruginosa was determined. the extract at sub-mic was used to determine biofilm format...

background and aims: acinetobacter baumannii is mostly a cause of septicaemia, pneumonia and urinary tract infections following hospitalization of patients with more severe illnesses. the aim of this study was to determine the prevalence and detection of the most prevalent virulence genes in a. baumannii isolated from hospital infections of two largest hospitals of tehran, iran. materials and m...

the virulence of pasteurella multocida (p. multocida) serotype a1 for chickens and mice was determined. groups of chicken and mice were exposed intramuscularly and intraperitoneally to various concentration of p. multocida broth culture, respectively. this strain was highly virulent for chickens so that those exposed to only 7 c.f.u. of the organism died in less than 24 hours. groups of mice ex...