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Canadian Journal of Infectious Diseases
Volume 14 (2003), Issue 3, Pages 163-166
http://dx.doi.org/10.1155/2003/829860
Case Report

Necrotizing Lung Infection Caused by the Protozoan Balantidium coli

Sat Sharma1 and Godfrey Harding2

1Section of Respirology, Departments of Medicine and Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
2Section of Infectious Diseases, Departments of Medicine and Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada

Received 27 May 2002; Accepted 15 February 2003

Copyright © 2003 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Balantidium coli, a ciliated protozoan, is well known to cause intestinal infection in humans. Extraintestinal spread to the peritoneal cavity and genitourinary tract has rarely been reported. There have also been a few cases of lung involvement from this parasite. A case of B coli causing a thick-walled right upper lobe cavity in an organic farmer who had contact with aerosolized pig manure is reported. Bronchoalveolar lavage fluid examined for ova and parasite revealed trophozoites of B coli in large numbers. Treatment with doxycycline hyclate led to marked improvement. Necrotizing lung infection caused by the protozoan B coli should be considered in individuals who report contact with pigs.