Assessment of protection against Eimeria tenella in broiler breeders conferred by a live anticoccidial vaccine and effects of vaccination on early pullet growth
| Autor: | M.S. Abdul Rasheed, P.L. Matsler |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Veterinary medicine animal structures animal diseases feed restriction Eimeria 03 medical and health sciences Immunity parasitic diseases medicine anticoccidial vaccine broiler breeder lcsh:SF1-1100 lcsh:TP368-456 biology 0402 animal and dairy science Broiler food and beverages 04 agricultural and veterinary sciences biology.organism_classification medicine.disease immunity 040201 dairy & animal science GROSS LESION Vaccination Eimeria acervulina lcsh:Food processing and manufacture Coccidiosis 030104 developmental biology Eimeria maxima Animal Science and Zoology lcsh:Animal culture |
| Zdroj: | Journal of Applied Poultry Research, Vol 29, Iss 2, Pp 447-454 (2020) |
| ISSN: | 1056-6171 |
| Popis: | Summary: Vaccination with live anticoccidial vaccine is widely practiced to control coccidiosis in broiler breeders. However, vaccination during feed restriction may affect early pullet growth. Two experiments were conducted using Cobb-500-FF broiler breeder female chicks to evaluate the level of immunity generated by a live anticoccidial vaccine and to study the effects of vaccination with low doses of Eimeria acervulina, Eimeria tenella, and Eimeria maxima on early growth of chicks during feed restriction. In the first experiment, unvaccinated and vaccinated chicks were allocated to battery cages at days postvaccination (DPV) 28, 35, 42, 49, and 56 and challenged with 100,000 oocysts of E. tenella. In the second experiment, a total of 280-day-old chicks were allocated to 2 groups and vaccinated with either 0 or 500 oocysts each of 3 species of Eimeria. Cecal gross lesion scores and dropping pan scores were significantly reduced (P |
| Databáze: | OpenAIRE |
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