The textbook bullseye rash with central clearing appears in only about 20 to 30 percent of erythema migrans cases. The more common presentation is a uniformly red, slowly expanding patch reaching 5 to 12 centimeters across at the bite site, appearing 3 to 30 days after attachment. Absence of a bullseye does not rule out Lyme.
Southern tick-associated rash illness produces an expanding red rash that looks indistinguishable from early Lyme disease, but it follows…
Borrelia miyamotoi disease shares a vector with Lyme disease - the same Ixodes species - but presents differently: high fevers that recur…
The hallmark spotted rash of Rocky Mountain spotted fever does not appear until day 2 to 5 of illness, and roughly 10 percent of cases…
A single Ixodes scapularis nymph the size of a poppy seed can deliver Borrelia burgdorferi after roughly 36 to 48 hours of attachment.…
Roughly 95 percent of confirmed Lyme disease cases in the United States are reported from 14 high-incidence states clustered in the…
CDC and IDSA guidance hold that Borrelia burgdorferi typically requires 36 to 48 hours of tick attachment to transmit. Removing a…