Summary Findings from Eligible Reports about the Natural Progression of Untreated Gambiense HAT Cases, Ranked by Duration of Observation Period

aDM = direct microscopy on blood, cerebrospinal fluid, or gland puncture fluid; CM = microscopy after blood concentration; PCR = polymerase chain reaction.bCase fatality ratio; only calculated if number of patients under observation >10.cA = active community screening; C = convenience screening; P = passive case detection; V = vertical transmission of HAT to patient's baby.dDemocratic Republic of the Congo.