Merck Manual

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Anaplasma phagocytophilum
Anaplasma phagocytophilum

Two neutrophils, each containing an A phagocytophilum morula, in equine blood (Wright-Giemsa, 100X oil immersion). Erythrocytes exhibit rouleau formation, a normal finding in this species.

Courtesy of Dr. John W. Harvey.