Giardia intestinalis: conservation of the variant-specific surface protein VSP417-1 (TSA417) and identification of a divergent homologue encoded at a duplicated locus in genetic group II isolates.

Abstract excerpt

The stability of the gene encoding TSA417, a 72-kDa variant-specific surface protein (VSP) produced by trophozoites of Giardia intestinalis isolate WB-C6, was investigated in isolates of similar (Assemblage A / Group I) or distinct (Assemblage A / Group II) genotype. Using primers specific for the WB-C6 tsa417 gene, DNA amplified in polymerase chain reactions from genomic DNA indicated the presence, in every...

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