Two Cases of Human Schistosomiasis in New Localities in Thailand *

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Abstract
Summary Two cases of human schistosomiasis occurring in localities outside the known endemic area of Thailand are presented. Schistosome eggs were found in a subcutaneous nodule over the jaw of a 64-year-old woman from Phitsanuloke, and in the small intestine of an adult male who died at Ubol respectively. On the basis of the shape and microscopic appearance of the eggs, they are probably those of Schistosoma japonicum, although they are smaller than those described previously for this species. There are evidences suggesting the presence of a distinct geographic strain in Thailand. This is believed to be the third reported case of cutaneous or subcutaneous infection with S. japonicum.

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