Figure 1From: Quality control in the diagnosis of Trichuris trichiura and Ascaris lumbricoides using the Kato-Katz technique: experience from three randomised controlled trials Total number of Kato-Katz thick smears read in three randomised controlled trials conducted on Pemba Island, United Republic of Tanzania. Flow chart detailing the number of Kato-Katz thick smears which were re-read for quality control, and hence were used for our analysis.Back to article page