HUMORAL AND PROTECTIVE RESPONSE OF INDIAN MAJOR CARPS TO IMMERSION VACCINATION WITH AEROMONAS HYDROPHILA
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Authors
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B. Kalita
College of Fisheries, Asswn Agricultural University, Raha- 782 I 03, India
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C. V. Mohan
Fish Pathology Laboratory, Department ofAquaculture, College ofFisheries,
Mangalore- 575 002, India
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K. M. Shankar
Fish Pathology Laboratory, Department ofAquaculture, College ofFisheries,
Mangalore- 575 002, India
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I. S. Azad
Central Institute of Brackishwater Aquaculture, 7 5, San tho me High Road,
Raja Annamalaipuram, Chennai- 600 028, India
Abstract
Fry of the Indian major carps, Cat/a cat/a (Ham.), Labeo rohita (Ham.)
and Cirrhinus mrigala (Ham.) were immunized at 4 and 8 weeks post hatching (wph) by direct immersion in a suspension (1 08 cells mr1
) of heat inactivated Aeronwnas hydrophila. Following the same procedure, booster dose was administered 20 days after the first immersion. Antibodies as well as protective response produced in both the groups after the first and the booster immersion were different and significant (P<0.05). No significant difference was found between the species in the two age groups. The specimens immunized 8 wph showed higher antibody titres and protection than the 4 wph group. C. cat/a had higher relative percent survival followed by L. rohita and C. mrigala.
Keywords: Indian majors carps, immune response, Aeromonas
hydro phi/a, immersion, challenge, relative percent survival
