Efficacy of In-Ovo Vaccination against Marek's Disease in Commercial Broiler
2006
Um, H.J. (Chungbuk National University, Cheongju, Republic of Korea) | Won, M.Y. (Chungbuk National University, Cheongju, Republic of Korea) | Lee, D.W. (Merial Korea, Seoul, Republic of Korea) | Go, D.W. (CherryBro Co., Ltd., Chinchon, Republic of Korea) | Mo, I.P. (Chungbuk National University, Cheongju, Republic of Korea), E-mail: moip@cbu.ac.kr
This study has been designed to evaluate the efficacy of MD in-ovo vaccination in broiler and to find the contamination level of MD virus in broiler farms. A nested PCR test was used to find the level of filed contamination of pathogenic MD virus in the commercial broiler farms. The positive rate of farms contaminated with pathogenic MD virus was 26.09%. And to evaluate the efficacy of MD vaccination, performance factors such as the mortality, feed conversion rate and body weight at market age has been recorded and compared among farms.
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