Abstract
Forty-seven paired specimens of ileum and mesenterial lymph nodes from goats originating from 2 herds with paratuberculosis were investigated. Culture of the specimens for Mycobacterium paratuberculosis was compared with Ziehl-Neelsen staining and with immunohistochemical tests on paraffin-embedded tissue sections, using a M. paratuberculosis immune serum and an avidin-biotin-alkaline phosphatase method. Immunohistochemical techniques detected most positive samples and produced more clearly visible reactions than did acid-fast staining. Eighteen of 47 samples were positive by immunohistochemical techniques may represent a valuable adjunct to standard techniques for diagnosis of paratuberculosis in goats.
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