Dhillon A S, Thacker H L, Dietzel A V, Winterfield R W
Avian Dis. 1981 Jul-Sep;25(3):747-51.
A flock of 7-week-old broiler chickens in northwestern Arkansas showed signs of respiratory distress. Gross pathologic alterations were excessive exudate in the tracheas and congestion of the nasal turbinates. An adenovirus was isolated from fresh trachea specimens. Microscopically, alterations in tracheal sections were thickened mucosa with inflammatory-cell lamina-proprial infiltrate and epithelial squamous metaplasia. Protozoan parasites present on the epithelial surface were identified by electron microscopy as Cryptosporidium spp. These organisms were attached to the tracheal mucosa epithelium and the luminal surface of mucous glands. The significance of the intercurrent adenovirus infection was not determined.
阿肯色州西北部一群7周龄的肉鸡出现呼吸窘迫症状。大体病理改变为气管内有过多渗出物以及鼻甲骨充血。从新鲜气管标本中分离出一种腺病毒。显微镜下，气管切片的改变为黏膜增厚，固有层有炎性细胞浸润以及上皮鳞状化生。通过电子显微镜鉴定出上皮表面存在的原生动物寄生虫为隐孢子虫属。这些生物体附着于气管黏膜上皮和黏液腺的管腔表面。并发腺病毒感染的意义尚未确定。
