Adoption of I2 vaccine in immunization of village chickens against newcastle disease virus in southern Tanzania: immune status of farmer vaccinated birds
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Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Agricultural Science
Abstract
Newcastle disease (ND) is an economically important disease of poultry for which vaccination is applied as a
preventive measure in many countries. In June 2009 we conducted a survey to establish the immune status of
village chickens against ND virus in villages where vaccination programs, using thermotolerant ND I2 vaccine
were adopted by farmers in southern Tanzania. One hundred farmers from ten villages in three district councils
were involved. Blood samples were collected from 499 chickens and sera harvested for Hemmagglutination
Inhibition (HI) test. Results indicated that 73.3% of the sampled birds had protective levels of antibodies against
ND virus. A significantly large proportional of vaccinated adult chickens attained protective immunity as
compared to growers and chicks. We recommend advocating ND I2 in other village chicken keeping
communities of the country for ND control. Additionally farmers need to be educated on control measures for
other important diseases of village chickens.
Description
Journal article
Keywords
Village chicken, I2 vaccine, HI test, Tanzania
Citation
10.5539/jas.v4n4p23