background: colibacillosis is one of the most economically important diseases of poultry worldwide. objectives: this study was conducted to examine the clonal relatedness and typing of 95 avian escherichia coli isolates by eric-pcr. methods: sixty-three e. coli isolates from two common manifestations of colibacillosis (yolk sac infection and colisepticemia) and 32 isolates from feces of apparen...

background: the emergence and propagation of different phylogenetic groups of antimicrobial-resistant e. coli have become a worldwide health concern in human and veterinary medicine. therefore, the evaluation of the phylogenetic distribution of antibiotic-resistant e. coli is important for therapeutic and economic purposes. the aims of this study were to determine phylogenetic groups and patter...

Serological studies of passive immunity in experimentally induced bovine colibacillosis was studied in a 41-cow university herd. Pregnant dams were antigenized prepartum with two injections administered by the subcutaneous and intrammamary routes with one of four vaccine preparations (killed bacteria, live bacteria, culture supernatant, or heart infusion broth [control]). The data indicate that...

olibacillosis is a major cause of illness and death in neonatal and recently weaned pigs. The disease is usually caused by enterotoxigenic strains of the bacterium Escherichia coli, although nonenterotoxigenic strains of that organism may also occasionally cause the disease. Diarrhea is typically fluid and profuse, and frequently results in severe dehydration and circulatory shock. Enterotoxins...

seventy poultry farms’ drinking water was tested for escherichia coli contamination in qom province iniran. the cases of colibacillosis from positive farms were also collected and tested. the isolates wereexamined for serotype, detection of virulence genes by multiplex pcr and antibiotic resistance. thirtypoultry farm water samples were e. coli positive (18.57%), although 13 e. coli isolates we...

chicken anemia virus was detected by pcr in tissue samples collected from poultry flocks in gujarat,india. the vp1, vp2 and vp3 gene sequences of cav from anand, gujarat were obtained after cloning thepcr products in pdrive cloning vector. nucleotide sequence alignment with other cav sequencesdemonstrated overall identity of 95-98.8%, 98.8-99.8% and 98.8-100% for vp1, vp2 and vp3 regions,respec...

Contamination of food and feed with mycotoxins is a worldwide problem. At present, acute mycotoxicosis caused by high doses is rare in humans and animals. Ingestion of low to moderate amounts of Fusarium mycotoxins is common and generally does not result in obvious intoxication. However, these low amounts may impair intestinal health, immune function and/or pathogen fitness, resulting in altere...

The present study reports on layer chickens with colibacillosis in 2 commercial egg-producing farms (referred to as farm A and farm B, which were managed by the same owner and were about 1 km apart) in the middle region of the Korean peninsula. The 2 flocks were infected at the initiation of egg laying. They were characterized by no previous clinical signs but sudden mortality (2.7-4.0%), with ...

This study was designed to evaluate the role of Escherichia coli type 1 pili in adherence of the organism to porcine small intestines and the efficacy of pili as a vaccine antigen in controlling neonatal colibacillosis. Our results demonstrated that an E. coli phase cloned to express type 1 pili readily attached to the small intestines of colostrum-deprived newborn pigs. Immunofluorescent stain...