Thumbnail of Flowchart of participants in study of short-term malaria reduction by single-dose azithromycin (AZT) during mass drug administration (MDA) for trachoma, Tanzania, January 12–July 21, 2009. AZT MDA (village-wide) and study panels show that 90% of persons who were intended to receive AZT received this drug. Total study participants with ≈1,000 in each group, shown in the study panel, contributed samples that are shown in the real-time PCR panel at each sampling time. Percentages in th