الفهرس | Only 14 pages are availabe for public view |
Abstract In this study we prepared E. coli vaccine by two different methods: 1. Sonicated E. coli vaccine. 2. Formalin inactivated E. coli vaccine where the breeder hens were vaccinated at age of 20 and 25 weeks. After that were evaluate the antibody titre using ELISA test and IHT (indirect heam agglutination) test. The results reveled that I. Immune response to vaccination: I-Sonicated E.coli vaccine Breeders ELISA titre was 8.86, 9.50, 9.79 and 9.84 at 1 S\ 2nd, 3rd and 4th weeks post vaccination while GMT titre was l.99, 2.35, 2.59 and 2.71 respectively. Eggs: , ELISA titer was 8.1, 8.4, 8.7 and 8.86 at 1st, 2nd, 3rd and 4th weeks post vaccination while GMT titre was l.38, l.7, 2.04 and 2.43 respectively. Chicks: ELISA titre were 8.81,7.29,6.8 ,6.8 and 5.79 at 1, 7, 14, 21 and 28 days old post hatching while GMT titre were 2.1, l.92, l.62, l.32 and l.20 respectively. |