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Laboratory Diagnosis of Tick-Borne Infections

Part 2


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IDSA Guidelines

Slide 34

July 2010

Now according to the IDSA guidelines for prophylaxis of Lyme, routine prophylaxis is not recommended after a recognized tick bite. However, a single dose of doxycycline may be offered to adult patients and children when ALL of the following circumstances exist.

First, the tick must be definitively identified as Ixodes scapularis, which is the main vector of Lyme disease in the US. The tick must have also been attached for 36 hours or more as determined by the exposure history and degree of engorgement of the tick. It must also be possible to administer prophylaxis within 72 hours of the time that the tick was removed, the local rate of infection of the ticks with Borrellia burgdorferi must be at least 20%, and doxycycline should not be contraindicated for use in the patient in question. Since this particular tick is not Ixodes scapularis, there is no indication for prophylaxis in this patient.

IDSA Guidelines


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