Merck Manual

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Porcine intestinal adenomatosis, Warthin-Starry stain
Porcine intestinal adenomatosis, Warthin-Starry stain

Porcine intestinal adenomatosis, Warthin-Starry silver stain, ileum. Note the black, curved rods of Lawsonia intracellularis just inside the apical cytoplasm.

Courtesy of Dr. John Prescott.