Archives

Page No. : 58-60

ABSTRACT

The present study was undertaken to determine the eff ect of the season of vaccination on IgG antibody titer on the 35th day after Brucellosis vaccination in crossbred calves. A total of 70 Vrindavani calves were vaccinated across three seasons at an organized farm. The season of vaccination was divided into three periods i.e., I (November to February); II (March to June); and III (July to October). Blood samples were collected through jugular vein puncture under aseptic hygienic conditions using vacutainers on the 35th day post-vaccination. Serum separation from collected blood samples was undertaken using the centrifugation method. The antibody titers were estimated using indirect ELISA against Brucella-specifi c IgG antibody. The antibody titers were evaluated for diff erences across vaccination seasons. Signifi cant diff erences were found in antibody titers across diff erent seasons. The mean antibody titer was the lowest for animals vaccinated during the winter season while it was highest in animals vaccinated during the rainy season. The antibody titers were similar across summer and rainy seasons. However, signifi cant diff erences were revealed between the rainy and winter seasons. The variation in the vaccine response of animals and season produced a signifi cant eff ect on the antibody titers on the 35th day post brucellosis vaccination.
Keywords: Brucellosis, IgG, season, signifi cance, titer, Vrindavani