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Laboratory Diagnosis of Tick-Borne Infections

Part 2


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Slide 33

July 2010

Based on morphologic features such as scutal markings and festoons, the lab was able to conclude that this tick is NOT an Ixodes tick, and instead, it is most likely to be Dermacenter varabilis, the dog tick. Now, since Lyme disease is only transmitted by Ixodes ticks in the United States, the patient can be reassured that he did not acquire Lyme disease from this particular tick. However, this raises the good question of whether or not it is valid to test a tick for Borrelia burgdorferi DNA, and how tick identification may play a role in Lyme prophylaxis.

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