1) C–Correct.

Hepatozoon americanum, the parasite seen in the figure, is known to be transmitted through ingestion of an infected tick rather than by the bite of an infected tick. ² More recent research shows that dogs can also become infected if they ingest a prey species, such as a rodent or rabbit, that harbors tissue cysts of H. americanum in its muscles. ³ Both H. americanum and Hepatozoon canis have been reported in the United States. ⁴ Hepatozoon americanum usually causes more severe disease, as in the case described here, whereas H. canis is typically thought to be less pathogenic. ²

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