Avian pathology: Footpad dermatitis in broiler chickens in Japan

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  • HASHIMOTO Shinichiro
    United Graduate School of Veterinary Science, Yamaguchi University Marubeni-Chikusan Corporation
  • YAMAZAKI Kenichi
    The Chemo-Sero-Therapeutic Research Institute
  • OBI Takeshi
    United Graduate School of Veterinary Science, Yamaguchi University Department of Veterinary Medicine, Faculty of Agriculture, Kagoshima University
  • TAKASE Kozo
    United Graduate School of Veterinary Science, Yamaguchi University Department of Veterinary Medicine, Faculty of Agriculture, Kagoshima University

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  • Footpad Dermatitis in Broiler Chickens in Japan

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The prevalence of footpad dermatitis (FPD) in broiler chickens in Japan was investigated. In the first examination at slaughterhouses, lesions were commonly observed on the footpads of a total of 8,985 broiler chickens from 45 flocks on 36 farms. In 3 flocks, all the birds examined had lesions. In the other 42 flocks, the incidence of FPD ranged from 31.9% (81/254) to 99.5% (1/222). The footpad lesions were classified into 4 categories according to the severity of dermatitis as follows; score 0, 1,181 birds (13.1%); score 1, 2,992 birds (33.3%); score 2, 3,000 birds (33.4%); and score 3, 1,812 birds (20.2%). The mean scores of the flocks varied widely from 0.31 to 2.69. Males had higher mean scores than females. No significant differences were found between the mean scores of birds reared in windowless houses and those in open-sided houses. On 4 farms, the investigation was carried out in different seasons, and 3 of them showed higher mean scores in winter than in summer. Next, observation of 2,255 birds from 15 flocks on 5 farms during a 4-week rearing period revealed that FPD was already produced at 7 days of age and worsened with age.<br>

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