Richardson J A, Morter R L, Rebar A H, Olander H J
Vet Pathol. 1984 Mar;21(2):152-7. doi: 10.1177/030098588402100203.
Porcine necrotic ear syndrome is a disease of swine characterized by large erosive lesions at the margin of the pinna(e). The gross and microscopic characteristics of the lesions were studied in 38 pigs selected from eight affected swine herds. The progression of the lesions was examined in a herd of 174 weaned pigs in a total confinement nursery. The lesions began as a superficial vesicular dermatitis associated with superficial auricular trauma and progressed to become exudative and encrusted. Localized lesions slowly healed or sporadically progressed to deep necrotic ulcers. The early lesions resembled the epidermal changes produced by Staphylococcus hyicus. Deep ulceration and necrosis was attributed to the invasion of streptococci into the dermis resulting in cellulitis, vasculitis, thrombosis, ischemia, and necrosis.
猪坏死性耳综合征是一种猪病，其特征为耳廓边缘出现大的糜烂性病变。对从8个受影响猪群中挑选出的38头猪的病变进行了大体和微观特征研究。在一个全封闭式保育舍中，对一群174头断奶仔猪的病变进展情况进行了检查。病变最初表现为与耳廓浅表创伤相关的浅表水疱性皮炎，随后发展为渗出性和结痂性病变。局部病变缓慢愈合或偶尔发展为深部坏死性溃疡。早期病变类似于由猪葡萄球菌引起的表皮变化。深部溃疡和坏死归因于链球菌侵入真皮，导致蜂窝织炎、血管炎、血栓形成、局部缺血和坏死。
