Salmonella pullorum (S. pullorum) is the causative agent of disease and results in severe economic losses poultry, can long-term survival by colonizing host organs. steE an effector protein secreted pathogenicity island 2. It not clear vivo for colonization Salmonella. To investigate role on S. Pullorum principal organs chicken, we used ΔsteE strains immunized chickens, respectively. The virule...

background & aim: aflatoxin (af) is the most important fungus that contaminates food and feed and can enter the food chain of humans. the aim of this study was to investigate the ability of thistle seeds (silybum marianum l.) to reduce the adverse effects of aflatoxin b1 (afb1) on the immune system, variables related to the intestine, appearance and mortality of the broiler chickens. exper...

A deletion of ∼20 amino acids in the stalk of neuraminidase is frequently observed upon transmission of influenza A viruses from waterfowl to domestic poultry. A pair of recombinant H7N1 viruses bearing either a short- or long-stalk neuraminidase was genetically engineered. Inoculation of the long-stalk-neuraminidase virus resulted in a higher cloacal excretion in ducks and led conversely to lo...

CHOTINSKY, D., M. KRUSTEVA, Ch. STANCHEV and A. KRIL, 2006. Effect of gamma radiation of full fat soybeans in broiler chickens. Bulg. J. Agric. Sci.,12: 811-821 The effect of the replacement of soybean meal in the diet of broiler chickens with untreated and treated by 0.35, 0.7 and 1.0 Mrad full fat soybeans upon the intensity of growth and nutrient utilization in the diet has been studied. The...

Beginning on day 4 ex ovo, and every 3 d thereafter, genetically dystrophic Line 413 chickens were given intraperitoneal injections (4 mg/kg body wt) of a protease inhibitor, leupeptin, pepstatin, or antipain. Experimental chickens received protease inhibitors dissolved in a water:ethanol:dimethyl sulfoxide solution (50:40:10, vol:vol:vol). Control untreated animals received diluent injections....

The study of the chickens’ immune system morphofunctional state allows assessing critical periods their development and body as a whole, well effectiveness vaccine prevention methods. purpose this was to identify morphological immunohistochemical changes in caecal tonsils chickens aged 8, 20, 40, 90, 110 days for infectious bronchitis. During study, following research methods were used: cytolog...

A mutant strain of chicken previously identified by a "recessive white skin" phenotype was found to have a profound deficiency in high density lipoprotein (HDL) and apolipoprotein A-I (apoA-I). ApoA-I levels in the mutant chickens were reduced by greater than 90%. Since HDL is the predominant cholesterol transporter in chickens, the HDL deficiency was associated with a greater than 80% decrease...

As a feed additive, ascorbic acid has been shown to have a protective effect against bacterial and viral diseases and to reduce the impact of detrimental stress in chickens. This study examined the effect of ascorbic acid treatment on in vitro heterophil function by examining random migration and phagocytosis and bacterial killing of Staphylococcus aureus. Heterophils were evaluated in broiler ...

The protozoan parasite Histomonas meleagridis is the causative agent of histomonosis in gallinaceous birds. In turkeys, the disease can result in high mortality due to severe inflammation and necrosis in caecum and liver, whereas in chickens the disease is less severe. Recently, experimental vaccination was shown to protect chickens and turkeys against histomonosis but dynamics in the cellular ...

Background: Some medicinal plants can stimulate growth in poultry. Objective: To compare the effects of dietary addition virginiamycin antibiotic and galbanum plant (Ferula gummosa) on performance, carcass characteristics, immune system, blood factors broiler chickens. Methods: A total 250 one-day-old male Ross 308 chickens were randomly assigned to five treatments with replicates (10 birds per...