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Aim: The present work was established in order to investigate the effect of ultra-corn administration on the immune response of vaccinated calves with FMD bivalent oil vaccine. Material and Methods: Forty calves; at a private farm in EL-Fayoum Governorate (Locality A); were divided into 4 groups where the first group was vaccinated with the locally produced FMD bivalent oil vaccine alone while the 2nd, 3rd and 4th group were vaccinated with the same vaccine simultaneously with the inoculation of 1, 1.5 and 2mL/100kg body weight of ultra-corn respectively to estimate the antibody titer, the suitable dose and effect of ultra-corn as immunostimulant using SNT and ELISA. Also after that used the effective and lowest dose of ultra-corn simultaneously with the vaccine in comparison with the vaccine alone by using 26 calves (Locality B) to study the efficacy of ultra-corn simultaneously with vaccine and the vaccine alone via challenge test using the virulent FMDV serotype A,O. Results: Tested serum samples obtained on week intervals post vaccination of all calve groups were subjected for estimation of induced FMD antibodies type A and O using serum neutralization test (SNT) and enzyme linked immune sorbent assay (ELISA). Both tests indicate that 1.5mL, 2mL of ultra-corn enhanced the immune response of vaccinated calves exhibiting higher and longer immunity than those received the vaccine alone. In addition 26 calves housed under restrict hygienic measures at Veterinary Serum and Vaccine Research Institute, were divided into 4 groups where group-1 of 10 calves were vaccinated with the bivalent FMD vaccine alone and group-2 was vaccinated with the same vaccine simultaneously with 1.5mL of ultra-corn while group 3 and 4 were kept as control for the challenge test. On the 4th week post vaccination group 1, 2 of these animals was subdivided into 2 subgroups where the challenge test was carried out against type A in a subgroup and O in other subgroup. SNT and ELISA showed similar results obtained from the vaccinated farm animals and challenge test via inoculation of virulent virus of FMD serotype A, O indicated that animals received ultra-corn showed 100% protection against both types of FMD virus while those did not receive ultra-corn showed 80% protection (vaccine alone). Conclusion: So it could be concluded that ultra-corn has a potentiate effect on the immunogenicity of bivalent oil FMD vaccine providing high immune levels of long duration. [Vet World 2013; 6(8.000): 486-492

Effect of administration of ultra-corn with bivalent Foot and Mouth disease oil vaccine in calves