What is the incubation of acute Chagas disease (American trypanosomiasis)?

Updated: Apr 26, 2019
  • Author: Louis V Kirchhoff, MD, MPH; Chief Editor: Pranatharthi Haran Chandrasekar, MBBS, MD  more...
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Answer

The incubation period of vector-borne acute Chagas disease is thought to be 7-14 days, but definitive data are not available because persons who live in areas of active transmission are generally continually at risk for exposure to the vectors. Although newly infected persons may be aware that their living quarters are infested by triatomine vectors, most blood meals are taken while people are asleep, so they are unlikely to recall being bitten.

Some persons develop bothersome inflammatory lesions at the bite sites that are caused by the injected salivary proteins, but their presence is not necessarily indicative of T cruzi infection. [110, 111, 112] The incubation period of acute T cruzi infection acquired through blood transfusion may be somewhat longer, but precise data are also lacking in this regard.


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