Parasitic infections in a closed community

Abstract
A study designed to elucidate the causes of mass morbidity and widespread intestinal disorders in Willowbrook State School has revealed the rôle of parasitic agents in the aetiology of the diseases. Strongyloides stercoralis, Hymenolepis nana and Giardia lamblia were the predominant pathogenic agents. Their spread was limited, however, to the children's buildings and to the severely mentally retarded. 522 patients with S. stercoralis and 322 with H. nana were detected during the period 1962–1970. Annual stool surveys served to trace symptomless carriers, to determine levels of endemicity and to assess the effects of treatment and control. Factors which influence the spread of parasitic infections are discussed in the light of findings of the survey and preventive measures for custodial institutions are outlined.

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