- 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
