2011 Fiscal Year Final Research Report
Anthelmintic resistance of bovine gastrointestinal nematodes to macrocyclic lactones in Japan
| Project/Area Number |
21580382
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied veterinary science
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| Research Institution | Kitasato University |
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Principal Investigator |
KUDO Noboru 北里大学, 獣医学部, 准教授 (20153306)
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| Co-Investigator(Kenkyū-buntansha) |
OYAMADA Takashi 北里大学, 獣医学部, 教授 (80050665)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 疾病予防・制御 |
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| Research Abstract |
Fecal egg count reduction tests using ivermectinpour-onformulation were conducted to investigate the prevalence of anthelmintic resistance in gastrointestinal nematodes on cattle farms in Aomori and Hokkaido, northernJapan, in 2009 and 2010.The egg count reductionsof predominant infecting nematodes, Cooperiaspp., were lower than90% on one farm in Aomori and two farms in Hokkaido after ivermectin treatment on August. The egg count reductions below 90% strongly suggest the presence of anthelmintic resistance. This is the first confirmation of ivermectin-resistantnematodes in cattle in Japan.
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