About the Authors
The authors have declared that no competing interests exist.
SH supervised management of the case, undertook the fieldwork, and wrote the paper. All authors contributed to the writing of the paper. MG did the laboratory work in Gambia and contributed to the fieldwork. LF managed the case at the Royal Victoria Teaching Hospital. WB did the antibody testing. HN undertook genotyping of the parasites. JAF advised on the parasitology and assisted with fieldwork. JP, BG, HW, and DM advised on the parasitology and management of the case. TC advised on management and assisted with fieldwork.