Natto is a Japanese traditional soybean product fermented by Bacillus natto. The effects of dried fermented soybean (natto) supplement on egg production and egg qualities of layer chickens was studied with regard to the effective use of various waste foods in Japan. Dried natto, prepared by heating at 60°C, was added to a basic diet at a level of up to 3%. Forty 166-wk-old layer chickens (Rhode...

Campylobacter jejuni is a major zoonotic pathogen transmitted to humans via the food chain and is prevalent in chickens, a natural reservoir for this pathogenic organism. Due to the importance of macrolide antibiotics in clinical therapy of human campylobacteriosis, development of macrolide resistance in Campylobacter has become a concern for public health. To facilitate the control of macrolid...

We compared the degrees of vitality 12 Korean native chicken breeds, such as Jaeraejong, Rhode Island Red (Rhode), White Leghorn, Cornish (Cornish), and Ogye breeds. The survival rate telomere length were measured vital markers. Telomere was analyzed via quantitative fluorescence in situ hybridization method using lymphocytes 466 chickens. found that decreased linearly with increasing chronolog...

Campylobacter contaminated poultry meat is a major source of human foodborne illness. Campylobacter coli strain OR12 is a robust colonizer of chickens that was previously shown to outcompete and displace other Campylobacter strains from the chicken's gastrointestinal tract. This strain is capable of aerobic growth on blood agar. Serial aerobic passage increased this aerotolerance as assessed by...

Chicks of distinct genotypes at the tumor virus B locus (TVB) in combination with presence or absence of endogenous avian leukosis virus ev21 gene in their genomes were examined for survival day patterns after challenge with very virulent plus Marek’s disease virus (vv+MDV) in three consecutive trials under controlled conditions. The distinct genotypic groups of the challenged birds were TVB*S1...

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...

Carbohydrate metabolism in chickens is character ized by hyperglycemia and insulin resistance compared to that observed in mammals. We previously reported that although gene of GLUT4 (an insulin-responsive glucose transporter ) is deficient in chickens (Seki et al., 2003), GLUT1 and GLUT8 are expressed, to a very small extent, in skeletal muscles (Kono et al., 2005). Fur thermore, it has been e...

BACKGROUND The heterogeneity observed regarding persistence, and subsequent fecal shedding pattern of the Salmonella Senftenberg (S. Senftenberg) serovar in chicken's calls for development of the optimized immunization strategy which can provide protection against various S. Senftenberg isolated. Optimization of an immunization strategy with a live attenuated S. Senftenberg (Δlon and ΔcpxR) vac...

Red Junglefowl (Gallus gallus) is considered as the direct ancestor of domesticated chickens. There is a wide speculation on the on-going gene flow between Red Junglefowls in the wild and some neigbouring native chicken populations in South and Southeast Asia. This may challenge the reliability of specific morphological markers to differentiate them and may have implications on the utility valu...

Poultry is the most frequent reservoir of non-typhoid Salmonella enterica for humans. Understanding the interactions between chickens and S. enterica is therefore important for vaccine design and subsequent decrease in the incidence of human salmonellosis. In this study we therefore characterized the interactions between chickens and phoP, aroA, SPI1 and SPI2 mutants of S. Enteritidis. First we...