Harris G C, Musbah M, Beasley J N, Nelson G S
Avian Dis. 1978 Jan-Mar;22(1):122-30.
Broiler chicks grown on litter or in cages at high bird density developed skin lesions on the thigh and hip. Changes in bird denisty markedly influenced lesion incidence (100% at 0.0185 sq m of floor space per bird). The dermatitis was characterized by crusted dry "scabs" at the base of feather follicles and between follicles. The lesions often coalesced to cover wide areas. The scab consisted of a mass of pyknotic nuclei and cellular debris, and when the epidermis was intact there was little inflammatory reaction in the dermis or subcutaneous tissue. The epidermis was destroyed in some lesions, with heterophils penetrating into the subcutaneous tissue. Colonies of gram-positive cocci were present in the lesions.
在垫料上或高密度饲养于笼中的肉鸡，其大腿和臀部出现皮肤损伤。饲养密度的变化显著影响损伤发生率（每只鸡0.0185平方米饲养面积时损伤发生率为100%）。皮炎的特征是在毛囊基部和毛囊之间有结痂的干燥“痂皮”。这些损伤常常融合成片，覆盖大片区域。痂皮由大量固缩核和细胞碎片组成，当表皮完整时，真皮或皮下组织几乎没有炎症反应。在一些损伤部位，表皮遭到破坏，异嗜性粒细胞侵入皮下组织。损伤部位存在革兰氏阳性球菌菌落。
