Actinomyces bovis, Gram-stained smear, cow
Photomicrograph of a fine-needle aspirate from a mandibular mass in a cow with actinomycosis. Actinomyces bovis cells appear as characteristically branching, slender, gram-positive rods. Gram stain; original magnification, 1000X.
Courtesy of Dr. John Prescott.
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