@article{oai:repository.naro.go.jp:00002251,
 author = {寺田, 裕 and TERADA, Yutaka},
 journal = {動物衛生研究所研究報告, Bulletin of the National Institute of Animal Health},
 month = {Feb},
 note = {To develop a more detailed understanding of the hygienic conditions and tick population in private small-scale　cattle pastures, a study of pasture conditions, its hygienic conditions and tick population was conducted in 32 small-scale　cattle pastures. Regular medical checks and tick control were conducted in five pastures (15.6%) and 18 pastures (56.3%), respectively. The occurrence of diseases was found in five pastures (15.6%). The results of the tick survey in 23 pasutures, showed that ticks (Haemaphysalis longicornis, H. flava, Ixodes ovatus and I. persulcatus) were collected from seven pastures. Some risk factors increasing the tick population in pastures were as follows (1) using pastures for a long period, (2) little or no tick control, (3) pasturing in public grazing land before/after private small scale pasturing, (4) existence of woods around the pastures, and (5) invasion of pastures by wild life. The infection rates of Theileria orientalis sergenti (TOS) in the three pastures were 0, 50 and 80%, respectively. The piroplasm major immunodominant protein gene (p33) of TOS was detected in six of 14 nymphal longicornis ticks collected from one pasture which showed 80% TOS infection. The results of this field survey indicate a necessity for countermeasures in order to maintain good hygienic conditions especially continuous tick control in private small-scale cattle pastures., 2008 年, 2009 年に耕作放棄地等を利用した小規模放牧の衛生対策状況とマダニ動態について調査した. 32 カ所の小規模放牧場において放牧状況, 衛生対策, 疾病・事故発生状況およびマダニの生息状況を調べた結果, 定期的な衛生検査の実施が５放牧場 （15.6％）, 疾病・事故の発生が５放牧場 （15.6％）, マダニ対策の実施が18 放牧場（56.3％） であった. マダニは調査した23 カ所中７放牧場で採集され, フタトゲチマダニ, キチマダニ, ヤマトマダニ, シュルツェマダニの２属４種であった. マダニが採集された放牧場には① 10 年以上の放牧歴, ②不十分なマダニ対策, ③公共牧場の併用, ④山林周辺の立地, ⑤野生動物の侵入という共通点が認められた. ３放牧場において放牧牛の小型ピロプラズマ病感染を調べたところ, ２放牧場で50, 80％であり, 放牧場の草地内から採集されたフタトゲチマダニ体内に小型ピロプラズマ原虫遺伝子が検出された. 以上のことから, 小規模放牧における衛生対策, 特にマダニ対策の重要性が示された.},
 pages = {11--18},
 title = {小規模放牧における衛生状況とマダニ動態},
 volume = {117},
 year = {2011},
 yomi = {テラダ, ユタカ}
}