In a recent case of scrub typhus in Australia, Orientia tsutsugamushi isola
ted from the patient's blood was tested by sequence analysis of the 16S rDN
A gene. The sequence showed a strain of O, tsutsugamushi that was quite dif
ferent from the classic Karp, Kato, and Gilliam strains. The new strain has
been designated Litchfield.