Frequent vaccination failures have occurred in the broiler farms in Eurasian countries during Newcastle disease outbreaks. The disease is enzootic in many countries of the region, especially in southwest Asia. I-2 vaccine has been used successfully in village chickens in many Asian and African countries. Our preliminary study showed good efficacy of the vaccine in broiler chickens. Therefore th...

a total of 448 ross 308 male broiler chickens were assigned to seven treatments with four replicates, each containing 16 chicks. the birds were reared from d 21 to 42 and effects of physical sizes (ad libitum by a basal commercial broiler diet with 3050 kcal/kg me and 19.06% cp/kg from 21 to 42 d. the chickens which received clinoptilolite (1.5% with particle size of 0.4-0.8 mm) showed a signif...

Four Thai synthetic chicken lines (Kaen Thong, Khai Mook Esarn, Soi Nin, and Soi Pet) originated from Thai native and exotic commercial chickens were evaluated for their growth and carcass traits with the purpose of developing a Thai broiler breeding program. Insulin-like growth factor I (IGF-I) gene is known to play an important role in growth, proliferation and differentiation. Consequently, ...

A total of 184 tracheas, 147 livers, 150 spleens and 148 hearts from apparently healthy and dead chickens were sampled and the bacterial flora was determined. The bacteria most commonly cultured from these four organs of healthy birds were Staphylococcus spp., Streptococcus spp., and Escherichia coli. Escherichia coli, Aeromonas spp., Staphylococcus spp., Proteus spp., and Citrobacter spp., wer...

Objective. identify the presence of chicken anemia virus (CAV) in poultry farms and backyard chickens from Antioquia, Colombia. Materials Methods. Blood feather samples were taken laying chickens; each farm, three birds six different ages (1, 15, 30, 60, 90, 120 days old) chosen randomly. Backyard also obtained near research farms. We used serology molecular techniques to analyze samples. Resul...

Three experiments were conducted to determine the effects of pelleting and extrusion of feeds on the utilization of phytate P by broilers. The first experiment investigated the effects of pelleting the whole corn-soybean meal (SBM) diet, the corn, or SBM separately on phytate P utilization. The P-deficient basal diet contained 0.5% total P and 0.2% phytate P. Steam pelleting the whole diet, the...

The experiment aimed to study the effect of post-hatch early held feeding times starter supplemented with egg yolk and white on growth performance, viscera development and immune response in broiler chickens. The working hypothesis was based on the fact that better development of the gastrointestinal tract and immunity system in the first week of the chicks' life affects positively the growth p...

Large creamy color livers of some chickens from a commercial broiler flock, reared in Tehran province, were noticed in a slaughter house. Myeloid leukosis (myelocytoma) characterized by presence of typical gross and microscopic lesions was diagnosed. Further studies for assessment of prevalence of this disease in broiler breeders and broilers flocks was suggested.