39.牛隻出現慢性下痢、消瘦、迴腸黏膜因大量巨噬細胞浸潤增厚,抗酸染色於巨噬細胞內可見大量桿菌,最可能的病因為:
(A)A型産氣莢膜梭菌Clostridium perfringens type A)
(B)鳥型分枝桿菌副結核亞型(Mycobacterium avium subsp. paratuberculosis )
(C)結核分枝桿菌(Mycobacterium tuberculosis)
(D)牛放線菌 (Actinomyces bovis)
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統計: A(164), B(1780), C(278), D(107), E(0) #2407543
統計: A(164), B(1780), C(278), D(107), E(0) #2407543