Quantification and Genotyping of Aichi Virus 1 in Water Samples in the Kathmandu Valley, Nepal.

Aichi virus 1 genomes were detected by quantitative PCR in groundwater from shallow dug (10/22) and tube wells (1/15), river water (14/14), and sewage (1/1), with the maximum concentration of 4.0 × 109 copies/l. Nucleotide sequencing analysis demonstrated the prevalence of genotype B in the virus positive samples.