A 2001 NEJM trial by Robert Nadelman and colleagues showed that a single 200 mg oral dose of doxycycline within 72 hours of removing an attached blacklegged tick reduced the risk of Lyme disease by 87 percent. CDC and IDSA recommend prophylaxis when all of: tick is identified as Ixodes scapularis or pacificus, attached at least 36 hours, bite occurred in a high-incidence area, and treatment can start within 72 hours.
CDC and IDSA guidance hold that Borrelia burgdorferi typically requires 36 to 48 hours of tick attachment to transmit. Removing a…
An unattached tick can crawl on a person for hours before biting. CDC's two-hour shower rule is based on field studies showing that…
An attached tick's level of engorgement is the most useful proxy for how long it has been feeding. A flat, unengorged tick is probably…
Because Babesia microti and Borrelia burgdorferi share the same vector and the same reservoir mice, a single Ixodes scapularis bite can…
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…
The most effective personal protection against tick attachment in field studies is the combination of permethrin-treated outer clothing…