This study was conducted to find the effect of methionine and threonine supplementations higher than the NRC recommendation on growth performance and white blood cell differentiation of broiler chickens challenged with infectious bursal disease. A total of 450 day-old male broiler chicks were assigned to nine groups. Chickens were fed by three graded levels of DLmethionine [NRC (M1), 2 times NR...

The objective of the experiment was to evaluate effects post-hatch feeding time and two different pre-starter diets on growth performance relative weight visceral organs yolk sac in slow-growing chickens. A total 480 one-day-old chicks (Luong Phuong breed) were randomly assigned into 4 treatment groups a completely randomized design 2 × factorial arrangement with 10 per pen. factors consisted (...

In order to identify the mechanisms which underlie fattening in commercial birds, lean and fat broiler chickens have been selected according to 3 different criteria: abdominal fat content, plasma glucose level and plasma concentration of very-low-density lipoproteins (VLDL), the latter being the main substrate from which bird adipose tissues accumulate triglycerides. Chickens selected for high ...

In this study Mentofin was used in commercial broiler chickens naturally exposed to infectious bursal disease virus (IBDV) and administered live Newcastle disease virus (NDV) vaccine to evaluate the ability of Mentofin to reduce Escherichia coli-related respiratory lesions, immunomodulate Newcastle disease (ND) vaccine response, change pharyngeal aerobic bacterial counts, and have certain impac...

The aim of the study was to determine the effect of yeast probiotic on body weight, and the activities of anti-oxidant enzymes: superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx), and malondialdehyde (MDA) concentration of broiler chickens. The experiment was carried out on hybrid Hubbard broiler chickens (n = 200). Two-hundred day-old chicks were randomly selected and ...

During the last 4 years there has appeared in New England flocks a disease of young chickens hitherto unrecognized. This disease was described in a preliminary report (Jones, 1932) as "An encephalomyelitis in the chicken." Its increasing frequency among commercial flocks in the last 2 years has made necessary the use of a more descriptive name. In view of the striking symptom which differentiat...

With attention to quality variations in commercial Dicalcium phosphates (DCPs) and their P bioavailability, aim of this study was to comparison of DCPs purchase from different Iranian factories in broiler grow performance. 256 male chickens (28-day old) were randomly selected for this experiment. 8 chickens with approximately same weight were placed in per cage. The rations were formulated acco...

BACKGROUND The molecular mechanisms underlying meat quality and muscle growth are not clear. The meat quality and growth rates of local chickens and commercial broilers are very different. The Ribo-Zero RNA-Seq technology is an effective means of analyzing transcript groups to clarify molecular mechanisms. The aim of this study was to provide a reference for studies of the differences in the me...

Highly pathogenic avian influenza virus (HPAIV) H5N1 has been endemic in Egypt since 2006, and there is increasing concern for its potential to become highly transmissible among humans. Infection by HPAIV H5N1 has been described in experimentally challenged birds. However, the pathogenicity of the H5N1 isolated in Egypt has never been reported in naturally infected chickens and ducks. Here we r...

BACKGROUND Although modern commercial poultry production today is based on large farms and intensive husbandry, keeping backyard poultry has regained popularity in industrialized countries. However, the health status of backyard flocks is still relatively poorly documented. A questionnaire was sent to the owners of 376 backyard poultry flocks (<500 birds) in order to study health management pro...