Chakrarat Pittayawonganon1*, Hathaikan Chootrakool2, Sopon Iamsirithaworn1, Pilaipan Puthavathana3, Sukhum Chaleysub2, Prasert Auewarakul4, Somkid Kongyu1, Kumnuan Ungchusak1 and Pasakorn Akarasewi1
1Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand.
2Suan Dusit Poll, Suan Dusit Rajabhat University, Bangkok, Thailand.
3Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
4National Science and Technology Development Agency, Ministry of Science and Technology, Bangkok, Thailand.
