Study of effect of immunosuppresion caused by H9N2 in broiler

Abstract

This study was concerned with conduction of experiment for these
reason three groups of broiler chicks were used.
First group (which consisted of 15 chicks) was vaccinated with live
attenuated vaccine (laSota strain) at age 10, 20, 30 days by drinking
water. Second group (which consisted of 15 chicks) was infected
experimentally with H9N2 (AMR.ANT/IRAQ/2005) 108.6 LD50/0.1ml
at age 8 day then vaccinated with live attenuated vaccine (LaSota strain)
at age 10, 20, 30 days by drinking water .third group (which consisted of
10 chicks) was considered as a control group without vaccination.
Immune response in all chicks groups were estimated at age (40) days
depending on Heamagglutination test and ELISA. The first group showed
highest titer in HI and ELISA tests in comparison with second and third
groups.