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Quantification of Protective Antibody Vaccine-Elicited in Chickens against Infectious Bursal Disease Virus

Journal of Agricultural Science and Technology(A) 2019年第1期9卷 38-45页

作者： Mohammad Nazrul islam md.Mostafizer Rahman Mir Rowshan Akter md.Shahidur Rahman Khan md.Salauddin md.hemayatul islam Department of Microbiology Faculty of Veterinary and Animal ScienceHajee Mohammad Danesh Science and Technology UniversityDinajpur-5200Bangladesh Department of Microbiology&Hygiene Bangladesh Agricultural UniversityMymensingh-2202Bangladesh Department of Veterinary and Animal Sciences University of RajshahiRajsahahi-6205Bangladesh

A study on infectious bursal disease virus(IBDV)on chickens of Cobb-500 strain broiler breed at Thakurgaon district of Bangladesh was *** protective antibody was measured on one day old chicks(DOC)and post-vaccinated(PV)flocks up to 75 weeks by indirect enzyme linked-immunosorbent assay(I-ELISA).The assays have included five flocks with vaccination historic against IBDV contained 45,000 birds with age ranging from DOC to 75 weeks,just before *** derived antibody(mdA)mean titer(MT)ranged from 3,395 to 5,*** antibody from serum samples(N=92 per flock)were titer tested by I-ELISA at age 14 d,5,8,23,50 and 75 weeks of each vaccinated *** titer level gradually decreased before *** done by intermediate plus vaccine resulting titers level was increased and stayed at the same *** antibody MT at the 14th day was 500,which supported Deventer *** protective antibody MT was declined at growing,laying,mid laying and last stage of laying *** mdA titer was enough in offspring that could protect birds easily.

关键词： Infectious bursal disease(IBD) broiler breeder of strain Cobb-500 antibody titer maternally derived antibody(mdA) indirect ELISA

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Study on Vaccination Efficacy against Avian Influenza in Rajshahi, Bangladesh

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Journal of Agricultural Science and Technology(A) 2017年第3期7卷 193-198页

作者： md. Shofiqul islam md. hemayatul islam md. Jalal Uddin Sarder K. M. Mozaffor Hossain md. Shofinur Rahman Mir Rowshan Akter Institute of Biological Sciences University of Rajshahi Rajshahi-6205 Bangladesh Department of Veterinary and Animal Science University of Rajshahi Rajshahi-6205 Bangladesh Youth Training Center Naogaon-6520 Bangladesh Department of Microbiology Hajee Mohammad Danesh Science and Technology University Dinajpur-5200 Bangladesh

Vaccines are used in integrated control strategies to guard poultry against H5N1 high-pathogenicity avian influenza （AI）. This study was to evaluate the efficacy of AI vaccine against AI in poultry. About 400 serum samples were collected from the selected 130 farms located at Rajshahi region, Bangladesh. The study was carried out from January, 2013 to January, 2015. The AI vaccine titres were compared in different breed of layer, environmental temperature, feed and egg production. Result showed that the value of titres （mean ± SD） in Hyline brown, Hyline white, Bovans white and Novogen white were 6.71 ± 0.05, 6.67 ± 0.06, 6.79 ± 0.03 and 6.43 ± 0.04, respectively. The highest serum antibody titres were 6.61 ± 0.24 against AI antibody in 〉 26 ℃ environment temperature. The highest and lowest serum antibody value of AI against feed brand （nutrient） were 7.75 ± 0.08 and 5.58 ± 0.22 for Aftab and Quality brand feed, respectively.

关键词： Avian influenza titres layer environmental temperature and egg production.

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