Affiliation: | Chulalongkorn University, Bangkok, Thailand (A. Thontiravong, P. Ninvilai, W. Tunterak, N. Nonthabenjawan, S. Chaiyavong, K. Oraveerakul, A. Amonsin); ;Animal Health and Technical Service Office, Bangkok (P. Ninvilai, K. Angkabkingkaew, C. Mungkundar, W. Phuengpho) |