Volume 30, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



, a cause of cutaneous leishmaniasis, multiplied more rapidly within human macrophages in vitro at 35°C than at 37°C, and was almost completely eliminated at 39°C. In contrast, , the cause of the visceral leishmaniasis, multiplied equally well at 35°C and at 37°C, and was only 40% eliminated at 39°C. This in vitro study suggests that the localization of the two strains to cooler and warmer regions of the body, respectively, is at least partially explained by the inherent temperature sensitivity of the parasite-macrophage unit. The striking elimination of this strain of within macrophages at 39°C may make this model suitable for predicting the clinical response of cutaneous strains to heat therapy.


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