A Clinical Study to Develop a Controlled Human Infection Model Using Leishmania Major-infected Sand Flies

The first six subjects will be exposed to biting by Phlebotomus duboscqi infected by Leishmania major and assess the 'take rate', that is the number of subjects developing parasitologically confirmed cutaneous leishmaniasis (PCCL) lesions. If 6/6 subjects develop PCCL lesions no further recruitment will take place; if only \< 6 subjects develop PCCL lesions, then an adaptive design will be followed.