a study was conducted to compare the growth performance as well as blood and carcass variables of two broiler strains reared in a conventional broiler house and a modified greenhouse equipped with cooling pads and tunnel ventilation system. eight hundred day-old chickens of two commercial strains (ross  308 and lohmann) were selected and placed in  8 floor pens (4 pens of  50 broilers for each ...

Development of molecular-based immunotherapeutic strategies for controlling Salmonella Typhimurium (ST) infection in poultry requires a better understanding of intestinal and cecal cytokine responses. Accordingly, an experiment was conducted to measure changes in intestinal cytokine expression when commercial source broiler chickens were challenged with a nalidixic acid-resistant ST. Ross broil...

Campylobacter is a leading bacterial cause of human foodborne infections in the United States. Recent studies suggest that the organism is highly prevalent in poultry semen and may contribute to vertical transmission between the breeder hen and offspring. Because Campylobacter requires iron for its growth and survival, the objective of this study was to determine if the addition of natural and ...

The efficacy of the commercial competitive exclusion product Broilact against Campylobacter jejuni was evaluated in broiler chickens in a 5-week pilot-scale study. Newly-hatched broiler chicks were brought from a commercial hatchery. After arrival 50 seeder chicks were challenged orally with approximately 10(3) cfu of C. jejuni, wing marked, and placed back in a delivery box and moved to a sepa...

a semi-field study was carried out to evaluate the effect of two medicinal herbs, individually and in combination, on growth performance, carcass traits, nutrient digestibility and immune response of broiler chickens.  a total of 384 one-day-old straight-run arbor acres broiler chickens were allocated into 24 floor pens prepared in a commercial broiler house. pen-groups were fed one of the foll...

Although Salmonella is a major problem in poultry food safety, it is believed to be of minor concern for broiler production in regard to animal performance. To determine the effect of Salmonella challenge in broiler chickens, 2880 male Cobb 500 birds derived from a commer­ cial hatchery were evenly distributed over 48 floor pens resulting in 60 birds per pen. Litter was 50% new wood shavings an...

Global consumption of poultry products, especially poultry meat, has consistently increased over the years, and this trend is expected to continue. Much of the increase in global demand for poultry products will be in developing countries. Such growth in the poultry industry is having a profound effect on the demand for feed and raw materials. However, it is also becoming clear that the require...

S OF PAPERS 209 M60 Evaluation of the fomite transmission of two Mycoplasma synoviae genotypes Natalie Armour*SC, Naola Ferguson-Noel University of Georgia, Athens, GA Mycoplasma synoviae (MS) is a prevalent and economically significant poultry pathogen, causing respiratory tract infections or infectious synovitis. MS was identified as the causative agent of an outbreak of severe respiratory di...

The value of dietary exogenous enzymes in promoting growth and efficiency of feed utilization is well recognized in poultry industry. In a case of high-cost yellow corn, several feed producers are choosing to replace yellow corn with other ingredients that have lower nutritional value like triticale, wheat, barley or sorghum. These crops are rich in non-starch polysaccharides (NSPs), and there ...

The objective of this study was to document and understand the perceptions and opinions of small-scale poultry producers who market directly to consumers about microbial food safety risks in the poultry supply chain. Between January and November 2014, we conducted semi-structured, in-depth interviews with a convenience sample of 16 owner-operators of Maryland direct-market commercial poultry fa...