Synthetic hormones and bioactive substances (vitamins, pigments and isoflavons) which have been used in the feed industry are accumulated in milk, meat and eggs. It is suspected that these are responsible for a number of side-effects such as carcinogenesis, liver and kidney damage, allergies in consumers. Furthermore the synthetic hormones, vitamins, pigments are less active than those extracte...

The mammalian oviduct has long been recognized as an organ essential to the success of reproduction. Bovine, ovine, porcine and equine animal models have offered clear advantages for oviduct study related to gamete physiology, fertilization and early embryo development. Livestock species are amenable to surgical alteration of the reproductive tract, estrous cycle manipulation, gamete cryopreser...

Enclosed and insulated commercial poultry buildings provide ideal habitat for supporting unusually large populations of the house mouse (Mus musculus L.). Mice cause damage to various structural and operational components of poultry facilities; thus, they are of economic significance as well as general nuisances. Effective mouse control programs in poultry operations are often difficult, compli...

To determine the effect of dietary brous ingredients on intestinal microbial population and activity, 48 early–weaned (24–25 days) pigs were divided into six dietary treatments: a standard diet (STD) based on corn, barley and soybean protein; or high brous diets obtained by replacing some major ingredients of STD with 8% Wheat bran (WB), 8% Wheat middlings (WM), 6% Sugar beet pulp (SBP), 4% W...

Synthetic and natural toxicants are constituents of soil, air, water and foodstuffs. Their impact on animal agriculture has resulted from acute and chronic intoxication and residues transferred into meat, dairy and poultry products. Recent advances in analytical chemistry and the sciences associated with toxicology have allowed better assessment of the hazard of toxicants on animals including m...

 In accordance with the Iranian government intention toward two step forward elimination of energy subsidies policy in coming years, we focus in this study on the extent by which the corresponding raising costs will be distributed across the livestock sector and how they affected food security. For this purpose, scenario of increasing energy prices and improving productivity at vertical and hor...

There is growing concern with regard to the continued emergence of antibiotic resistant bacteria, which pose a significant risk to both human and animal health. Antibiotics have been used as therapeutic agents in agriculture since the 1940 s and in subtherapeutic doses as food additives to improve feed conversion of livestock and domestic poultry since the 1950's. However, the use of antibiotic...