Prevalence Report of Transovarian Transmitted Diseases in the Breeder Chickens, Korea

• Published in: Korean journal of poultry science Vol. 37; no. 3
• Main Authors: Kwon, Y.K., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Kang, M.S., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Oh, J.Y., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Jung, B.Y., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Kim, H.R., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Kim, H.Y., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Shin, S.Y., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Kwon, J.H., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea, Chung, G.S., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
• Format: Journal Article
• Language: Korean
• Published: 01.09.2010
• Subjects: ANAEMIA; ANEMIA; ANEMIE; MYCOPLASMA; SALMONELLA; transovarially transmitted diseases
• ISSN: 1225-6625

A survey of transovarially transmitted diseases, including salmonellosis [(pullorum disease; PD)/(fowl typhoid; FT)], mycoplasmosis, avian infectious anemia (CIA), and fowl adenovirus infection was conducted in the breeder chickens from August to December in 2009. The numbers of flocks sampled out were: Grand Parents Stock (GPS), 45; Parents Stock (PS) 1,018, Baeksemi breeder (BSB) 54. The seroprevalence of salmonellosis (PD/FT) were 0% (GPS), 3.2% (PS), and 3% (BSB), respectively. A total of 983 chicken farms were affected with FT outbreaks between 2000 and 2008. The incidence of FT in commercial broilers, Baeksemi, commercial layers, native chickens, and broiler breeders was 44.3%, 26.2%, 15.7%, 12.6% and 1.08%, respectively. Of the affected broilers, over 90% birds were under 2 weeks of age, indicating it was possible that they were infected with S. gallinarum via vertical transmission. The sero-positive flocks against Mycoplasma gallisepticum (MG) were 71.1% (GPS), 88.7% (PS), 88.7% (BSB), while the rates of positive flocks against Mycoplasma synoviae (MS) were 86.0% (GPS), 77.0% (PS), and 98.0% (BSB). In GP and parent farms, the detection rates on specific genes of CIA virus were 19/45 (42.2%), and 169/1039 (18.0%), respectively, whereas the seroprevalence of CIA were 86.0% in GPS and 93.7% in PS flocks. In addition, positive flocks of fowl adenoviruses were 4.4% (GPS), 2.7% (PS) and 9.35% (BSB), respectively. As the results, avian mycoplasmosis and CIA have been more prevailing in chicken breeder than avian salmonellosis and fowl adenovirus infection in Korea.