Most parent flocks are vaccinated with both live vaccines and killed oil-emulsion products which produce a high level of maternal antibody that protects the chick for its first 3-4 weeks of life.
The method was proved to be very sensitive, specific and repetitive by detecting different sera samples from clinical and immune ducks, which can diagnose the disease rapidly.
The method was proved to be very sensitive, specific and repetitive by detecting different sera samples from clinical and immune ducks, which can diagnose the disease rapidly.