Summary

Preston returned to the NIH for treatment. Chris Fisher had also received treatment and tolerated it better than Dave Yoder had. Preston did not experience serious side effects from the drug, though he had a headache, nausea, lethargy, and apathy. After six days, he had to stop treatment because of kidney function, and the side effects went away after about a week. Three months later, the NIH doctors told him his case was in remission (though he notes that since that time, his symptoms appear to be returning).

He visited the lab in which NIH conducts its leishmaniasis research, called the Intracellular Parasite Biology Section. He notes that the sand fly has a lower body temperature than humans, and the leishmaniasis parasite do not like the higher temperature of the human body so they remain on the skin or go into...