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Risk factors for infectious bronchitis virus infection in laying flocks in three provinces of Korea: preliminary results
2005
Pak, S.I. (Kangwon National University, Chunchon, Republic of Korea), E-mail: paksi@kangwon.ac.kr | Song, C.S. (Konkuk University, Seoul, Republic of Korea) | Mo, I.P. (Chungbuk National University, Cheongju, Republic of Korea) | Song, C.Y. (Boram Animal Hospital, Pyungtaek, Republic of Korea) | Kwon, H.M. (Kangwon National University, Chunchon, Republic of Korea) | Yoon, H.J. (Kangwon National University, Chunchon, Republic of Korea) | Son, Y.H. (Konkuk University, Seoul, Republic of Korea)
To analyze and identify selected risk factors for infectious bronchitis virus (IBV) infection in the growing and laying period of laying-hen flocks, a longitudinal field study was conducted with 27 commercial flocks reared in three provinces of Korea during the period from May 2003 to April 2004. Using monitored data for IBV infection status among study flocks we computed the multivariate odds ratios (ORs) and their corresponding confidence intervals (CIs), and population attributable risks (PARs). Multivariate logistic regression showed significant risk increments for: continuous entry of chick (OR=1.9, 95% CI, 0.7-69.1) and operation years of the layer house greater than or equal to 5 years (OR=3.2, 95%CI, 1.6-389.9).
Показать больше [+] Меньше [-]Studies on the combined inactivated oil emulsion vaccine of newcastle disease and avian infectious bronchitis in chickens
1990
Jeon, Y.S. | Kim, S.J. | Seo, I.S. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine)
Outbreaks of infectious bronchitis in Korea
1986
Rhee, Y.O. | Kim, J.H. | Kim, J.H. | Mo, I.P. | Youn, H.J. | Choi, S.H. | Namgoong, S. (Rural Development Administration, Anyang (Korea R.). Veterinary Research Inst.)
Reduced egg production with depigmented, chalky deposit, wrinkled and malformed eggs was observed in breeder flocks throughout the country. The disease was identified as Infectious Bronchitis based on serological findings and virus isolation
Показать больше [+] Меньше [-]Appearance of globule leukocytes in tracheal and broncheal mucosa in Korean native cattle with pneumonia and rats experimentally infected with Klebsiella pneumoniae
1997
Park, S.J. | Jeong, K.S. (Korea Rearch Institute of Bioscience and Biotechnology, KIST, Taejon (Korea Republic)) | Lee, C.S. (Kyongpook National University, Taegu (Korea Republic). College of Veterinary Medicine)
