Evalution of cellular immunity in broiler vaccinated with some newcastle vaccines in Sharkia Governorate

الملخص EN

A total of 300 one day old chicks were divided into 6 groups.

These groups were vaccinated at 7 days old.

The first group was vaccinated with inactivated Aluminums hydroxide gel formalized “IAHGF” ND vaccine in a dose of 0.2 ml / bird injected s / c in the dorsal side of the neck.

The second group was vaccinated with inactivated oil emulsion “IOE” ND vaccine through s / c route in dose of 0.2 ml / bird.

The third group was vaccinated with both the “IAHGF” vaccine.

Given S / C and the HB1 vaccine by eye drop.

The fourth group was vaccinated with both the “IOE” and the HB1.

the fifth group was vaccinated with the live HB1 vaccine by eye drop.

While the six group non vccinated was served as control.

Cell mediated immune response was evaluated by the lymphocyte transformation test and delayed hypersensitivity “skin” test ,as well as the challenge test, confirming uses of the IOE vaccine only or with the live HB1 vaccine produced a higher cellular immune response than the IAHGE when given alone or with the HB1 vaccine.

The cellular immune response began higher with the live HB1 vaccine than with the killed ones but declined earlier.