Positive results were confirmed by conventional PCR amplification by using single primer pairs and subsequent sequencing. Amplicons were purified by using a PCR purification kit (Sol-Gent, Daejeon, Korea) and sequenced by using the BigDye Terminator Cycle Sequencing Kit (PE Applied Biosystems, Foster City, CA, USA) and an ABI PRISM 3730XL DNA analyzer (PE Applied Biosystems). Sequences were analyzed using the Basic Local Alignment Search Tool (BLAST) provided by The National Centre for Biotechnology Information (http://www.ncbi.nlm.nih. gov/BLAST).