The Giardia assemblage was successfully determined from 247 specimens by either DNA sequencing (239 specimens) or on-gel visualization of the tpi assemblage-specific products (eight specimens for which DNA sequencing failed): assemblage B was found in the majority of the specimens (64 %, n = 158), followed by assemblage A (33 %, n = 82) and mixed-assemblage infections (3 %, n = 7). The gene discussed is TPI1; the disease is infection.