An outbreak of acute fascioliasis among Aymara Indians in the Bolivian Altiplano

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
J BjorlandJ B McAuley

Abstract

Fasciola hepatica is a common and important parasite of sheep, cattle, and other ruminants. In May 1991, 30 persons with possible acute fascioliasis were identified by health care providers at a district hospital in the Bolivian Altiplano, and two deaths were associated with this illness. A cross-sectional survey of a random sample of 30 (20%) of the 148 households in the community and a case-control study were performed to determine the extent of the outbreak and the vehicle of transmission. Ninety-one members from 23 of the 30 selected families participated in the cross-sectional survey. Twenty-one of the 91 members met the case definition for acute fascioliasis (illness since 16 February 1991 that was characterized by fever and abdominal pain plus serum IgG antibodies to F. hepatica), and 38 (49%) of 78 members had serum IgG antibodies to F. hepatica. If this rate is extrapolated to the entire community, an estimated 116 individuals (23% of 504) would have acute fascioliasis and 247 individuals (49% of 504) would have evidence of current or previous infection. Case-control analysis indicated that the only factor associated with illness was eating kjosco (an aquatic plant) while tending animals in the fields; 27 (52%) of the ...Continue Reading

Citations

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