Bovine venereal vibriosis. Ultrastructure of endometrial inflammatory lesions

The inflammatory lesions in bovine venereal vibriosis have been examined by light and transmission electron microscopy in order to provide a better understanding of host defense of the uterus against bacterial invasion. Neutrophils and eosinophils were found mainly at the endometrial surface and in glandular lumina. Mononuclear cells within the endometrial tissue were identified ultrastructurally. Lymphocytes were most abundant, plasma cells were next in frequency, and mononuclear phagocytes were least often observed. An attempt was made to classify lymphocytes on the basis of presence or absence of a cytoplasmic network of filaments and other ultrastructural characteristics.