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  • Title: Subcurative chemotherapy and fatal post-treatment reactive encephalopathies in African trypanosomiasis.
    Author: Hunter CA, Jennings FW, Adams JH, Murray M, Kennedy PG.
    Journal: Lancet; 1992 Apr 18; 339(8799):956-8. PubMed ID: 1348799.
    Abstract:
    The treatment of late-stage African sleeping sickness in man is often complicated by a post-treatment reactive encephalopathy. The bases of this pathological reaction was investigated in a mouse model of African trypanosomiasis. Subcurative treatment with diminazene aceturate, which did not clear parasites from the central nervous system, resulted in a post-treatment meningoencephalitis similar to that seen in man. By contrast, a curative regimen of melaminylthioarsenite and 5-nitroimidazole, which cleared parasites from the central nervous system, did not cause any pathological reaction in the mice. This result indicates that subcurative treatment leads to the development of the post-treatment encephalopathy. Evidence that this may also be the case in man was provided by the detection of trypanosome DNA with the polymerase chain reaction in the brains of 9 patients who had died as the result of a post-treatment reaction. Our findings suggest that more aggressive treatment regimens, which ensure the elimination of trypanosomes from the central nervous system, may prevent post-treatment reactions in patients.
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