EVALUATION OF NEWCASTLE DISEASE ANTIBODY LEVELS IN GIRIRAJA CHICKEN UNDER INTENSIVE AND BACK YARD SYSTEM OF REARING IN MIZORAM, INDIA

D. DEKA¹, R. GOSWAMI², H. BAYAN³*, L. HMAR⁴, J.K. CHOUDHARY^5
1Department of Veterinary Public Health & Epidemiology, College of Veterinary Science & Animal Husbandry, Central Agricultural University, Aizawl, 796014, India
²Department of Livestock Production and Management, College of Veterinary Science & Animal Husbandry, Central Agricultural University, Aizawl, 796014, India
³Department Veterinary Surgery & Radiology, College of Veterinary Science & Animal Husbandry, Central Agricultural University, Aizawl, 796014, Mizoram, India
⁴Department of Livestock Production and Management, College of Veterinary Science & Animal Husbandry, Central Agricultural University, Aizawl, 796014, India
⁵Department of Animal Genetics & Breeding, College of Veterinary Science & Animal Husbandry, Central Agricultural University, Aizawl, 796014, Mizoram, India
* Corresponding Author : bayhit1973@gmail.com

Received : 04-10-2019     Accepted : 26-10-2019     Published : 30-11-2019
Volume : 11     Issue : 11       Pages : 664 - 666
Genetics 11.11 (2019):664-666

Keywords : New Castle disease, Vaccines, Giriraja, Intensive system, Back yard system
Academic Editor : Katiyar Manoj, Dr Abhijit K Barate, Paviter Kaur, Dr Muthana I Maleek
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to College of Veterinary Science & Animal Husbandry, Central Agricultural University, Aizawl, 796014, Mizoram, India
Author Contribution : All authors equally contributed

Post vaccination Newcastle Disease (NCD) antibody levels were evaluated by haemagglultination inhibition test on 48 numbers of day old Giriraja chicks. The chicks in group IA, IIA, IIIA & IV A were reared in intensive system and chicks of group IB, IIB, IIIB & IVB under back yard system of management with eight replicates in each group. Three vaccination regimes against Newcastle disease using live lentogenic and mesogenic strains, F strain alone on day 7 (Group IA & IB), F strain on day 7 and day 28 (Group IIA & IIB) and F and R2B strains on day 7 and day 28 (Group IIIA & IIIB) were used. Group IV A and IV B were kept as unvaccinated control groups. The sera samples from vaccinated birds were collected on day 15, 30, 45 and 60 post vaccinations. The maternal antibody levels were persisting till day 15 in both the unvaccinated control groups with positive indices. The mean log2HI antibody titres were significantly (P<0.05) increased from day 15 to day 45 in both the groups vaccinated with F vaccine on day 7 reared in intensive and backyard system and significantly decreased on day 60. However, booster vaccination with F and R2B vaccine revealed significant (P<0.05) increase in antibody titre in all the groups till two months of age irrespective of rearing system. The booster vaccination with F and R2B vaccines revealed higher antibody levels in the groups reared under intensive system than the groups reared under back yard system of management on day 30, 45 and 60 with significantly higher levels of antibody on day 45.

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