Accuracy of data is of paramount concern for all research. The task of prov
iding objective assurances of accuracy of parasitologic data for a large, m
ulti-center epidemiologic research project in Egypt (Epidemiology 1, 2, 3 [
EPI 1, 2, 3]) presented a unique set of challenges undertaken jointly by th
e Ministry of Health's Qalyub Center for Field and Applied Research with te
chnical assistance from Tulane University (New Orleans, LA). The EPI 1, 2,
3 project was part of large bilateral research program, the Schistosomiasis
Research Project, undertaken jointly by the governments of Egypt and the U
nited States. This paper describes the nature of the quality control system
developed to accomplish this task, presents results and discusses the find
ings.