Coccidiosis, an enteric disease caused by Eimeria species, continues to be a substantial economic burden on the global poultry industry. With increased concerns regarding prophylactic antimicrobials to control coccidiosis alternate methods of preventative control have been developed, yet innovation to strengthen these methods has been limited. Live Eimeria vaccination stimulates immunity from t...

The present study was undertaken to examine the effect of recombinant chicken leptin administered to fed ad libitum and feed-restricted immature chickens of a layer strain on ovarian development and the timing of sexual maturity. In the first experiment 11-week-old pullets (77 days of age) fed ad libitum were injected daily with leptin at four dose levels (4, 16, 64 and 256 microg/kg body weigh...

The modulating effects of ascorbic acid (AA), vitamin E (E), and a combination of AA and E (AA + E) against eight-hour road transportation stress were investigated in 120 pullets during the hot-dry season. The result obtained showed that handling, loading and transportation induced lymphopenia, neutrophilia, liveweight loss, and mortality, which was alleviated by oral administration of AA, E, a...

Chickens of three blood group genotypes, B1B1, B1B2 and B1B19, were compared in their ability to produce antibodies. The B locus is the major histocompatibility locus in this species. Homozygous B1 pullets had significantly higher adult mortality than did the B1 heterozygotes. In two separate experiments the B1B1 females produced significantly fewer antibodies to Salmonella pullorum than did th...

Three hundred 18 week-old Shaver Brown pullets (1,477.40±7.41 g) were allotted to 5 treatment groups containing 3 replicates of 20 pullets each. The treatments consisted of five feeding space allowances (FSA): 5.60, 8.40, 11.20, 14.00 and 16.80 cm/bird. Data were collected on feed consumption, weight change, egg production and feed conversion ratio (feed: dozen eggs) for a period of 20 weeks (1...

Over the years, poultry industry has used various types of promoters toimprove production; however, current trend is to eliminate growth that cause resistance in humans, for example, antibiotics European Union, there a need look natural alternatives are beneficial body and do not have negative impact on human health. The objective present study was evaluate productive parameters, pullets from o...

Poultry nutritionists have based the feed requirements of broiler breeder hens on the principles designed for the feeding of commercial laying pullets because of the l ack of information specific to these birds. The practice of restricting the feed intake of broiler breeders during both the rearing and the laying periods differs from the that of feeding commercial pullets, and was introduced as...

Previous research toe clipping day old Leghorn pullets reduced bird hysteria with no impact on feed consumption or BW to 16wk (Ruszler, 1974). Egg production was greater and mortality was reduced compared to control birds. Recently, toe trimming turkeys and broilers with a microwave technology has demonstrated reduced carcass tears and downgrading. Therefore, three Leghorn strains at 1d of age ...

Light plays a key role in the development, production performance, health, and well-being of poultry. Yet there are no standards regarding light type, spectrum, intensity and diurnal photoperiod for poultry production. Thus, it is of socio-economic as well as scientific values to assess light needs of pullets and laying hens, especially considering the emergence of LED lights intended for poult...