Age Distributions of <I>Rhodococcus equi</I>-Infected Foals at the First Clinical Examination and Death

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  • TAKAI Shinji
    Department of Animal Hygiene, School of Veterinary Medicine and Animal Sciences, Kitasato University
  • HIGUCHI Tohru
    日高地区農業共済組合家畜診療センター
  • KATO Masakatu
    北海道石狩家畜保健衛生所

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  • 軽種馬生産地におけるロドコッカス・エクイ感染子馬の初診日齢と死亡日齢
  • ケイシュバ セイサンチ ニ オケル ロドコッカス エクイ カンセン コウマ ノ
  • Age Distributions of Rhodococcus equi-Infected Foals at the First Clinical Examination and Death

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Abstract

Sixty nine of 91 foals pathologically and bacteriologically diagnosed as Rhodococcus equi infection at Animal Clinic Center of Nosai Hidaka, Hidaka Livestock Hygiene Service Center, and Kitasato University School of Veterinary Medicine and Animal Sciences from 1992 to 1996, were analyzed for age distributions atthe first clinical exmamination and death. About 88% of the foals showed clinical signs within 2 months of age peaking at 40 days, and the mean age at the initial clinical examination was 53.4±21.7 days. About 77% died within 80 days of age peaking at 50 to 60 days, and the mean age at death was 77.7±35.4 days. Foals with mixed and enteritis types of disease and those born in March and April showed slightly advanced ages at the first clinical examination and death, but difference was not significant. There was no bias with breeds and sex of foals.

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