Figure 1.
Patient classification into three etiologic groups. Inconclusive tests included those that were contaminated (bacteria), those that were missing results, and those that did not meet the parasitemia threshold (microscopy). Chest X-ray results were classified as (1) normal, (2) infiltrates other than end-point pneumonia, and (3) lobar consolidation or pleural effusion (endpoint pneumonia). PCR = polymerase chain reaction; WBC = white blood cell.