Effect of e. coli and its treatment on the immune response for newcastle disease vaccines in chickens

The effect of E. coli infection and its treatment on immune response of chickens before and after vaccination against N D with using immunostimulant in so/ne groups before and after E. coli infection at different ages (7, 10, 21 and 30) days The results w(35 ± l.75), (30 ± l.71) and (16 ± 0.88), (25 ± l.53), (28 ± l.82) and (26 ± 1.46) 10 and 21 days post vaccination respectively, in infected control group the titres were (11 ± 0.68), (7 ± 0.4]), (0 ± 0.00), (0 ± 0.00) and (5 ± 0.31), (5 ± 0.30), (0 ± 0.0