Molecular identification of Trypanosoma cruzi I tropism for central nervous system in Chagas reactivation due to AIDS.

Trypanosoma cruzi lineages, microsatellite allelic polymorphism, and mithocondrial gene haplotypes were directly typified from peripheral blood and cerebrospinal fluid specimens of a Bolivian patient with Chagas disease with accompanying AIDS and central nervous system severe involvement. Of note, the patient's blood was infected by a mixture of T. cruzi I and T. cruzi IId/e polyclonal populations while the cerebrospinal fluid showed only a monoclonal T. cruzi I population. Our findings do not corroborate the original assumption of innocuity for T. cruzi I in the southern cone of the Americas and highlight lineage I tropism for central nervous system causing lethal Chagas reactivation.