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Am. J. Trop. Med. Hyg., 25(6), 1976, pp. 803-807
Copyright © 1976 by The American Society of Tropical Medicine and Hygiene

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Fatal Human Infection with Mesocercariae of the Trematode Alaria Americana*

R. S. Freeman, P. F. Stuart, J. B. Cullen, A. C. Ritchie, A. Mildon, B. J. Fernandes AND R. Bonin
The Departments of Microbiology and Parasitology, Medical Microbiology, Pathology, and Medicine, University of Toronto, and The Tropical Diseases Clinic and the Department of Pathology, Toronto General Hospital, Toronto, Canada

A fatal human infection with mesocercariae of Alaria americana is described. Several thousand mesocercariae were estimated to be present in the peritoneal cavity, bronchial aspirate, brain, heart, kidneys, liver, lungs, lymph nodes, pancreas, retroperitoneal adipose tissue, spinal cord, spleen, and stomach. Nine days from the onset of symptoms death resulted from asphyxiation due to extensive pulmonary hemorrhage probably caused by immune-mediated mechanisms. Circumstances suggest the victim probably ate inadequately cooked frog legs while hiking. Mesocercariae penetrated through the stomach wall and spread to the various organs both directly and via the circulatory system.

Accepted for publication May 3, 1976.


* Address reprint requests to: Dr. R. S. Freeman, Department of Microbiology and Parasitology, Fitz-Gerald Building, University of Toronto, Toronto, Canada M5S 1A1.




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W. Shoop and K. Corkum
Transmammary infection of newborn by larval trematodes
Science, March 9, 1984; 223(4640): 1082 - 1083.
[Abstract] [PDF]


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Copyright © 1976 by the American Society of Tropical Medicine and Hygiene.