Author affiliations: Chulalongkorn University, Bangkok, Thailand (S. Puranaveja, S. Kesdaengsakonwut, P. Kitikoon, P. Choojai, R. Kedkovid, K. Teankum, R. Thanawongnuwech); Kasetsart University, Kamphangsan, Thailand (P. Poolperm, P. Lertwatcharasarakul, A. Boonsoongnern, K. Urairong)
Appendix Figure. Phylogenetic trees generated on the basis of nucleotide of the M gene region (A) and the partial S gene region (B). Trees constructed with neighbor-joining method by using MEGA 3.1 (DNAStar Inc., Madison, WI, USA). Horizontal branch lengths are proportional to genetic distances between Porcine epidemic diarrhea virus (PEDV) strains.
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