Answer: Schistosomiasis
As Anonymous (x 2) point out, the geographic distribution is most consistent with infection due to Schistosoma japonicum. This is supported by the fact that no obvious spines are visible on any of the eggs seen. However, I should point out that seeing spines of S. mansoni or S. hematobium in tissue is often difficult due to the fact that the eggs are cut in various planes and are semi-collapsed, so that the egg outline is jagged and irregular.
Sunday, November 7, 2010
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