• blood
  • They undergo a series of schizogonies in the blood cells, as a result of which the number of parasites in the blood sharply increases. (thefreedictionary.com)
  • By the early 1980s, it was established that when the parasite (both the trophozoite and schizont forms) enters the blood stream and infects RBCs, the infected cells form knobs on their surface. (wikipedia.org)