Early sequential findings in the genitalia of rams experimentally infected with Actinobacillus seminis
2008
Abstract AIM: To investigate and assess the sequential pathological changes in the epididymis and testis of young rams injected intra-epididymally with Actinobacillus seminis. METHODS: Twenty yearling Suffolk and Suffolk-cross rams were randomly divided into two groups comprising 16 test and four control animals. Each test ram received 2.3 × 109 cfu/ml of A. seminis injected intra-epididymally. Every 24 h post-inoculation (p.i.), two test rams were randomly selected, euthanised, and necropsied, until the end of the experiment at 192 h p.i. One control animal was euthanised at 24 h, 48 h, 96 h and 144 h p.i., respectively. The reproductive tract of each ram was carefully examined, lesions photographed, and tissues cultured. Thin sections of tissue samples were fixed and examined by light microscopy; additionally, epididymal tissues were examined by scanning electron microscopy (ScEM). RESULTS: Gross lesions were observed in the cauda epididymis of all test rams, and ranged from swelling at 24 h p.i. throug...
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