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American Journal of Epidemiology Vol. 114, No. 1: 102-111
Copyright © 1981 by The Johns Hopkins University School of Hygiene and Public Health

research-article

INCAPACITATING EFFECTS OF SCHISTOSOMIASIS MANSONI ON THE PRODUCTIVITY OF SUGAR-CANE CUTTERS IN NORTHEASTERN BRAZIL

F. S. BARBOSA1 and D. P. PEREIRA DA COSTA2

1University of Brasilia, School of Health Sciences, Unit of Community Health Brasilia 70.910, Federal District, Brazil
2Research Center Aggeu Magalhaes, Oswaldo Cruz Foundation Recife, Pe., Brazil

Studies were carried out on two sugar estates in the humid coastal forest region of northeastern Brazil, a highly endemic area of schistosomiasis mansoni. Results obtained In a retrospective study were not conclusive, but clear-cut results emerged from a prospective study. The latter was conducted on a sugar estate (Catende) where the severe hepatosplenic clinical form of the disease is seen in 4% of the field-working population. Comparison was made between two groups of paired subjects: one composed of workers with the hepatosplenic form of the disease and the other composed of workers with the intestinal form. Reduction of productivity among the hepatosplenic subjects compared to intestinal subjects was 35.1%. The loss to the Catende sugar estate from reduced productivity caused by schistosomiasis mansoni for the harvest season of 1978 was calculated as 0.93% of the estate's total production, or approximately US$135,000. When this figure is extrapolated to the State of Pernambuco (16 million tons of sugar total annual production), the annual loss in the state is estimated to be US$2 million.

Schistosoma; Schistosoma mansoni; schistosomiasis; trematode infections


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