Giardia
New subgenotypes of Giardia duodenalis identified in raw urban wastewater
Published in Medical Letter on the CDC and FDA, August 22nd, 2004
According to a study from the United States, "Giardia cysts in 131 raw wastewater samples from Milwaukee, Wisconsin, were genotyped by sequence analysis of the triosephosphate isomerase gene which showed the presence of two distinct genotypes (assemblages A and B) of Giardia duodenalis. Of the 131 samples, 111 belonged to assemblage A, and the remaining samples belonged to assemblage B."
"A high degree of genetic polymorphism was evident within the assemblage B cluster, with 10 distinct subgenotypes identified,...
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