Journal
JOURNAL OF VETERINARY MEDICAL SCIENCE
Volume 71, Issue 7, Pages 937-944Publisher
JAPAN SOC VET SCI
DOI: 10.1292/jvms.71.937
Keywords
cattle; Hokkaido; MPSP; p23; Theileria orientalis
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Funding
- Promotion of Basic Research Activities for Innovative Biosciences (PRO-BRAIN)
- Japanese Ministry of Education, Science, Sports, Culture and Technology
- Japan Society for Promotion of Science (JSPS), Japan
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Theileria orientalis is one of the benign species of Theileria that is widely distributed in Japan and is sometimes responsible for serious economic losses in the livestock industry. tit the present Study, we surveyed the current status of T. orientalis infection in grazing cattle in the eastern areas of Hokkaido (Taiki, Otofuke, Shintoku, and Shin-Hidaka districts) using molecular methods, as well as traditional methods, of diagnosis. The genes encoding the major piroplasm surface protein (MPSP) and p23 of T orientalis were identified using highly detectable polymerase chain reaction (PCR). Results of the MPSP-PCR assay indicated that grazing cattle in these districts, after about 1.5 months pasturage, showed high rates of infection, ranging from 10.0-64.8%. Although the main MPSP and p23 genotypes detected were the Ikeda- or Chitose-types, an MPSP gene closely relating to that Found in Okinawa prefecture, and a p23 gene closely relating to the Australian (Warwick) Buffeli-type gene, were found in the cattle in Shintoku and Shin-Hidaka districts. The present Survey indicated that there were at least Five types of T orientalis classified by their MPSP genes in Hokkaido, Japan, and that T orientalis infection rates are still high in this region.
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