An atypical case of actinobacillosis with involvement of the skin of t
he right hind limb and its lymphatics was diagnosed in a cow. The gran
ulomatous lesions were observed as several masses along the lateral pa
rt of the right hind limb. The right precrural lymph node was enlarged
more than 10 times its normal size. Histopathological examination of
biopsy materials revealed actinobacillus granuloma. Smears of granular
pus obtained from the precrural lymph node showed a small number of g
ram negative bacilli.