MSD Manual

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Acid-fast stain of lymph node, Holstein cow
Acid-fast stain of lymph node, Holstein cow
Acid-fast stain of lymph node, Holstein cow

Acid-fast stain of ileocecal lymph node from a Holstein cow with paratuberculosis. Blue cells are mononuclear inflammatory response (macrophages and lymphocytes), and red-stained bacteria are MAP.

Courtesy of Dr. Michael Collins.