The occurrence of at least 2 CTCAE grades increase from baseline in ALT or AST during the 4 weeks study period was evaluated to characterize hepatic safety aspects of single and multiple ascending doses of KAE609 in adult malaria subjects for treatment of uncomplicated malaria caused by plasmodium falciparum. If 2 patients in a 10 patient cohort (Cohorts 1 and 2) or 3 patients in a 20 patient cohort (Cohorts 3, 4 and 5) had at least 2 CTCAE grades increase from Baseline in ALT or AST, recruitment was suspended and a review of liver safety (and any other relevant data) by safety review committee was initiated. Any further progression of the study was based on the decision by the safety review committee.

To observe the exposure-response (PK/PD) relationship for a single dose of KAE609. The key parameter is MIC, defined as the concentration at which the relative rate of change in parasitemia is equal to zero. Approximation of MIC will assist in identifying the optimal dose of KAE609, which will be one component of a future combination antimalarial. MIC could not be determined due to small sample size no data was collected from any participants.

Calculated based on parasite count in blood. In thin film, use actual WBCs/µl, of blood to calculate parasite density by using the following formula: parasites/µl= #parasites× actual WBC/#WBCs counted. In thick film, assume that there are 250 RBCs per HPF, RBC count from 8 HPF equal 2000 RBC, Use actual RBCs/µl blood to calculate parasite density by using the following formula: parasites/µl= # of parasites in 8HPF/2000)× actual RBC.

The distribution of adverse events was done via the analysis of frequencies for Adverse Event (AEs), Serious Adverse Event (SAEs) and Deaths, through the monitoring of relevant clinical and laboratory safety parameters.