Shedding pattern of classical and variant strain of IB challenge virus in SPF and commercial layer vaccinated chicken with trivalent vaccine containing H9N2 AI, LaSota, classical M41 and var 2 IB viruses
Shedding pattern of classical and variant strain of IB challenge virus in SPF and commercial layer vaccinated chicken with trivalent vaccine containing H9N2 AI, LaSota, classical M41 and var 2 IB viruses
Hanan Sayed 1, Mohamed S. Madkour 1, Hussein A. Hussein 2, Ahmed A El-Sanousi 2