Phylogenetic tree constructed from the 519-nucleotide sequences between the C terminus of 3C and the N terminus of 3D. Bootstrap values of greater than 70% are shown at the branch nodes. The Aichi virus strains in this study are in boldface. Abbreviations of locations: JPN, Japan; B, Bangladesh; VN, Vietnam; T, Thailand; FR, France; PAK, Pakistan. Aichi virus strains M166/92, N128/91, and N628/92 were isolated from Japanese travelers returning from Malaysia (M) and Indonesia (N).