Molecular investigation of tick-borne pathogens in ticks from grazing cattle in Korea |
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| Authors: | Seung Won Kang Huong Thi Thanh Doan Se Eun Choe Jin Hyeong Noh Mi Sun Yoo Kondreddy Eswar Reddy Young Ha Kim Chang Hee Kweon Suk Chan Jung Ki Yoon Chang |
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| Institution: | 1. Parasitology and Insect Disease Research Laboratory, Animal, Plant and Fisheries, Quarantine and Inspection Agency, 480 Anyang 6 dong, Anyang City 420-480, Republic of Korea;2. Immunology Laboratory, Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam;3. Dept. of Botany, Plant Molecular Biology Laboratory, S. K. University, Anantapur, Andhrapradesh, India;4. Systemic Disease Laboratory, Animal, Plant and Fisheries Quarantine and Inspection Agency, 480 Anyang 6 dong, Anyang City 420-480, Republic of Korea;5. Bacterial Disease Division, Animal, Plant and Fisheries Quarantine and Inspection Agency, 480 Anyang 6 dong, Anyang City 420-480, Republic of Korea;6. Dept. of Animal and Plant Health Research, Animal, Plant and Fisheries Quarantine and Inspection Agency, 480 Anyang 6 dong, Anyang City 420-480, Republic of Korea |
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| Abstract: | This study was carried out to identify the tick species that infest grazing cattle and to determine the presence of tick-borne pathogens transmitted by these ticks in Korea. A total of 903 ticks (categorized into 566 tick pools) were collected from five provinces during 2010–2011. The most prevalent tick species was Haemaphysalis longicornis, followed by three Ixodes spp. ticks. The collected ticks were infected with both rickettsial and protozoan pathogens. In all, 469 (82.9%) tick pools tested positive for the Anaplasma/Ehrlichia 16S rRNA gene, whereas 67 (11.8%) were positive for the Babesia/Theileria 18S rRNA gene. Among the rickettsial pathogens, E. canis was detected with the highest rate (22.3%), followed by A. platys (20%), E. chaffeensis (19.4%), E. ewingii (19.3%), Rickettsia sp. (12.4%), A. phagocytophilum (5.5%) and E. muris (0.5%). Among the protozoan pathogens, T. equi was detected with the highest rate (7.2%), followed by T. sergenti/T. buffeli (3.7%) and B. caballi (0.35%). Simultaneous infections with up to seven pathogens were also identified. In particular, ticks infected with rickettsial pathogens were also infected with protozoan pathogens (22 samples). All five provinces investigated infected with tick-borne pathogens. |
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