Effects of age, hybrid type, housing system and poulty red mite load on the occurrence of plumage damage and skin lesions in laying hen farms: Results of logistic regression models with farm as random effect.

Plumage damage was associated significantly with age, hybrid type, housing system, and mite load. Skin injuries were associated significantly with age and housing system.羽毛损伤与日龄、杂交类型、饲养体系以及螨寄生负荷均存在显著相关性。皮肤损伤则与日龄及饲养体系存在显著相关性。