Molecular characterization of Theileria orientalis and Anaplasma bovis in Holstein cattle in the Republic of Korea

3^rd International Conference on Veterinary & Livestock

November 02-03, 2017 Bangkok, Thailand

Du-Gyeong Han, Ji-Hyoung Ryu, Jeong-Byoung Chae, J S Chae, D H Yu, J Park, H C Kim, B K Park and K S Choi

Kyungpook National University, South Korea
Seoul National University, South Korea
Gyeongsang National University, South Korea
Chonbuk National University, South Korea
Kangwon National University, South Korea
Chonnam National University, South Korea

Posters & Accepted Abstracts: J Vet Sci Technol

Abstract :

Tick-borne diseases (TBDs) lead to substantial economic loss to the livestock industry worldwide. In the present study, we investigated tick-borne pathogens (TBPs) in Holstein cattle from two diff erent regions in the Republic of Korea (ROK). 151 blood samples (80 from Namwon and 71 from Jeju Island) were analyzed and the prevalence of TBPs before and aft er grazing were compared. Of the 151 blood samples, overall infection rates of Th eileria orientalis and Anaplasma bovis were 26.5% (40/151) and 23.1% (3/13), respectively. In Namwon, two (5%, 2/40) and seven (17.5%, 7/40) cattle were positive for T. orientalis infection before and aft er grazing, respectively. In Jeju Island, T. orientalis infections were detected in 18 (31%, 18/58) and 13 animals (23.1%, 3/13) before and aft er grazing, respectively. All 3 cattle examined aft er grazing were co-infected with T. orientalis and A. bovis. Phylogenetic analysis revealed that our A. bovis isolates showed 99% homology with a Korean spotted deer isolate. Th is is the fi rst report to identify A. bovis infection in Holstein cattle in the ROK. In addition, co-infection with Chitose, Ikeda and Buff eli of T. orientalis were observed in one animal aft er grazing. Th ese results demonstrate that the incidence of T. orientalis and A. bovis infections increased aft er grazing. Th is study shows that the prevalence of TBPs is closely related to grazing and the seasonal activity of ticks. Further studies should focus on blood samples obtained from various climatic regions to identify the distribution of TBDs, as well as the association between these diseases and pathogenicity.

Biography :

Du-Gyeong Han is a student and an affi liate of Kyungpook University, South Korea.