Fig. 1.
Newcastle disease virus (A) and avian influenza virus (B) geometric mean HI titer in broilers.
T1, non medicated, NDV and AIV non vaccinated; T2, non medicated, NDV and AIV vaccinated; T3, flvomycin treated, NDV and AIV vaccinated; T4, lincomycin treated, NDV and AIV vaccinated; T5, zinc bacitracin treated, NDV and AIV vaccinated.