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Babesia

  • B. microti—most common in Northeastern U.S. and Midwestern U.S.
  • B. divergens—seen in splenectomized patients in Europe
  • B. duncani— most common species in Washington and California U.S.
  • Currently un-named strain designated MO-1--seen in Missouri
  • Humans are bitten by ticks: Ixodes

Larva (A), nymph (B), adult male (C), adult female (D), and engorged female with eggs (E) of Ixodes scapularis. Image courtesy of James Occi CDC website