This is a two-phase, mixed-methods pilot study of insecticide-treated lesus to reduce the incidence of P. falciparum malaria among infants in a rural area of western Uganda. Participants will be recruited from four villages immediately adjacent to the Bugoye Level III Health Centre (Bugoye, Kanyanamigho, Izinga, Rwakingi 1a) in the Kasese District of western Uganda.

The purpose of the study is to assess the feasibility and tolerability of using insecticide-treated lesus to reduce the incidence of P. falciparum malaria infection among infants.

This is a two-phase, mixed-methods pilot study of insecticide-treated lesus to reduce the incidence of P. falciparum malaria among infants in a rural area of western Uganda. Participants will be recruited from four villages immediately adjacent to the Bugoye Level III Health Centre (Bugoye, Kanyanamigho, Izinga, Rwakingi 1a) in the Kasese District of western Uganda.

The first phase will consist of a series of focus group sessions with mothers of young children and their male partners to gain further insight into lesu use, to include location of purchase and frequency of washing, as well as exploring initial perceptions of insecticide-treated clothing and inform the protocols for the open-label study.

The second phase will consist of a prospective, open-label study. Twenty-five (25) mothers and their young children will be provided with insecticide-treated lesus and twenty-five (25) controls who will be provided untreated lesus. After an initial visit, bi-weekly follow up, including finger-prick blood collections will continue for a period of twelve (12) weeks.

Collected blood spots will be transported to Epicentre for real-time PCR to identify sub-microscopic parasitemia and to the French Research Institute for Development (https://en.ird.fr) in Marseille, France for quantification of the mosquito salivary antigen (gSG6-P1 peptide). Remaining samples will be stored for future analysis.

Inclusion Criteria:

• Adult women (age greater or equal to 18 years) with a healthy child between the ages of 6 months to 18 months from one of four eligible villages

Exclusion Criteria:

• Mother or child with HIV (and thus taking cotrimoxazole prophylaxis)

Deidentified individual data that supports the results will be shared beginning 9 to 36 months following publication provided the investigator who proposes to use the data has approval from an Institutional Review Board (IRB), Independent Ethics Committee (IEC), or Research Ethics Board (REB), as applicable, and executes a data use/sharing agreement with UNC.

9 to 36 months following publication

The investigator who proposes to use the data has approval from an IRB, IEC, or REB, as applicable, and an executed data use/sharing agreement with UNC.