Fig. 4.

Comparison of odor profiles from parasite-free individuals vs. those harboring bloodstream parasites. (A) Representative GC traces from an individual with a high-density infection (>50 p/μL blood) and low-density infection (<50 p/μL blood). Compounds found to be associated with infection (other than 2-octanone; not visible due to very small amounts) are annotated. (B) The proportion (percent) that IAC contributed toward the entire odor profile, grouped by parasitological category (total density categories). The average number of non-IAC per group (i.e., all other volatile compounds; gray bar) was 171.27 (SE = 5.23) across all groups.