Molecular Characterization and Risk Factors of Giardia duodenalis among School Children from La Habana, Cuba

Figure 1

Ethidium bromide-stained 2% high-resolution agarose gel showing DNA amplified at the triosephosphate isomerase (tpi) gene. Lane 1, molecular marker X174DNA/BsuRI (HaeIII); lane 2, positive control to assemblage B (81 bp); lane 3, positive control to assemblage A (148 bp); lanes 4-5, positive samples to assemblage B; lanes 6-7, positive samples to assemblage A; lanes 8-9, negative controls for both assemblages.