牛瘟，4D 临床症状，奶牛
Cow infected with rinderpest virus, showing depression, dehydration, ocular discharge, and diarrhea staining over hind end.
Courtesy of Plum Island Animal Disease Center.
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Cow infected with rinderpest virus, showing depression, dehydration, ocular discharge, and diarrhea staining over hind end.
Courtesy of Plum Island Animal Disease Center.
