Salmonella Enteritidis is vertically transmitted to eggs from laying hens through infected ovaries and oviducts. S. Enteritidis can also penetrate the eggshell from contaminated feces. Reducing S. Enteritidis in laying hens is vital to provide safer eggs and minimize the spread of salmonellosis to humans. Antibiotics have been widely used to control bacterial diseases in broilers and laying hen...

Chickens from a Brown Leghorn line were challenged with Marek’s Disease Virus (MDV). Mortality and all visceral and nerve lesions were daily recorded. Three Major Histocompatibility Complex (MHC) haplotypes were characterized using genetic markers from the MHC-B region. MHC had a significant effect on the kinetics of mortality from MDV, one genotype being associated with an earlier death. Survi...

birds, sometimes numbering in millions, can cause serious damage to grain fields. in order to find a method to accordance with environmental issues and effective in controlling these birds, in this research, the effect of sound was studied for keep birds away. the broadcast unit was developed with the following design criteria: 1) three sound levels of hawk, gas gun and sparrow distress, with f...

Whether birds of a feather flock together or opposites attract is classical research question in social and personality psychology. In most existing studies, correlation-based techniques are commonly used to study the similarity/dissimilarity among entities. Social network data comprises two primary components: actors possible relations between them. It, therefore, has observations on both dyad...

Two studies were conducted to determine the efficacy of bacteriophage SPR02 and DAF6 at varying titers to treat colibacillosis in chickens. In Study 1, the treatments consisted of a control, i.m. injection of bacteriophage SPR02 or DAF6, Escherichia coli airsac challenge, and E. coli challenge followed by treatment at different titers with bacteriophage SPR02 or DAF6. The E. coli- challenged bi...

to compare the effects of two herbal extracts, antibiotic, probiotic, and ethanol extract of propolis on performance, relative weight of internal organs, carcass characteristics and morphology of the small intestine of broilers challenged with salmonella enteritidis a trial was performed based on completely randomized design. four hundred and twenty day old male broiler chicks including 7 treat...

A virulent Newcastle disease virus (NDV) isolate from an outbreak in commercial poultry, with virulence indices of MDT = 47-48 h; IVPI = 2,17 and ICPI = 1,8; was used to inoculate 10x vaccinated (standard poultry vaccines) as well as 10x unvaccinated slaughter ostriches via intratracheal, ocular and nasal routes, in a controlled environment. All unvaccinated ostriches developed clinical signs (...

The protective effect of hyperimmune IgY fraction of egg yolk prepared from hens hyperimmunized with multiple species of Eimeria oocysts on experimental coccidiosis was evaluated in young broilers. Chickens were continuously fed from hatch with a standard diet containing hyperimmune IgY egg yolk powder or a nonsupplemented control diet and orally challenged at d 7 posthatch with 5.0 x 10(3) spo...

background: to control avian coccidiosis with drug-independent strategy effec-tively and safely, multivalent hyperimmune egg yolk immunoglobulin (igy) was prepared and its ability to protect against eimeria tenella infection was evaluated. methods: hens were orally immunized with live oocysts of 5 species of eimeria for six times, antibody titers in serum and yolk were monitored by indirect enz...