Efficacy of oral pellet vaccine for Newcastle disease in desi chicken of Tamil Nadu
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Date
2015
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Abstract
The production of desi chickens in developing countries like India faces a major hurdle of infectious disease attacks- the most
common being, Newcastle disease (ND). Desi chickens act as reservoirs of virulent ND virus (NDV) and must hence be considered as
a continuing threat to poultry population throughout the world. As signs of clinical disease in chickens vary widely and diagnosis may
be complicated further by the different responses to infection by different hosts, the identification of NDV outbreaks becomes difficult.
Tirunelveli district of Tamil Nadu, India having high numbers of desi birds rearing was hence selected for the study. A randomly
selected population of 10,000 Desi birds, of an age group of 6-8 weeks, from various places of Tirunleveli district were identified for
the vaccination and seroconversion studies. Blood samples were collected using filter paper technique from the selected desi birds on
day-0 and 21 days post vaccination of oral pellet vaccine against Newcastle disease. Serological assay like haemagglutination inhibition
test enabled the assessment of post-vaccinal antibody response. The serological value could be clearly related to the expected immune
status of the vaccinated birds 21 days post-vaccination with HI titres of 24 or log24 or more against 4 HAU of antigen. The study
concluded that antibody response among the birds vaccinated with oral pellet vaccine was found to be significant, with no incidence of
respiratory stress and post vaccination mortality.
Description
TNV_IJPS_2015_50(3)340-341
Keywords
Veterinary Science