Immunosuppression can increase the susceptibility of chickens to other disease-causing pathogens and interfere with efficacy vaccination against those pathogens. Chicken anaemia virus (CAV) infectious bursal disease (IBDV) are common causes immunosuppression in chickens. was induced by experimental infection either CAV or IBDV assess effect on Mycoplasma gallisepticum strain ts-304 virulent M. ...

Clinical manifestation of the disease caused by chicken anaemia virus (CAV) occurs when chicks are vertically contaminated or before second week life. CAV control is based on vaccination broiler breeders in order to promote progeny protection through maternal antibodies. This work aims evaluate, under field conditions, antibody title commercial at 28, 48, and 68 weeks age, rate transference pro...

In this study, the pathogenicity of A/Ch/It/5093/1999 H7N1 which had been isolated from chicken during the outbreak in Italy was assessed in chicken by experimental infection virus. Ten SPF chickens of four week-old were inoculated with this virus, and five chickens were inoculated with uninfected allantoic fluid. For determination of virus shedding, oropharyngeal and cloacal swabs were taken f...

DNA isolated from avian virus-producing leukemic myeloblasts induced the production of viruses, but not morphological transformation, in cultivated chicken fibroblasts. The recovered virus had the same biological characteristics as the original avian myeloblastosis virus (AMV) and produced myeloblastosis and nephroblastomas when injected into chickens. Neutralization experiments with chicken an...