1. 1) Preuksaraj, S., Jeradit, C., Sathitayathai, A., Kijvannee, S. and Leedonrusmi, T. (1982) Studies on prevalence and intensity of intestinal helminthic infections in the rural population of Thailand 1980-1981. Commun. Dis. J., 8, 245-269.
2. 2) Ministry of Public Health, Thailand (2002) Report of the evaluation on the helminthiasis control program in Thailand by the end of the 8th Health Development Plan in the year 2001, Department of Communicable Disease Control, Ministry of Public Health, Bangkok (in Thai).
3. 3) Charanasri, U., Jongsuksantikul, P. and Jeradit, C. (1989) Survey of intestinal helminthiasis in 14 southern provinces of Thailand. Commun. Dis. J., 15, 391-404.
4. 4) Anantaphruti, M. T., Waikagul, J., Maipanich, W., Nuamtanong, S. and Pubampen, S. (2004) Soil-transmitted helminthiases and health behaviors among schoolchildren and community members in a west-central border area of Thailand. Southeast Asian J. Trop. Med. Public Health, 35, 260-266.
5. 5) Maipanich, W., Itiponpanya, N., Rojekittikhun, W., Siripanth, C., Pubampen, S., Sa-nguankiat, S., Juntanavivat, C., Incheang, S. and Sukosol, T. (2002) Intestinal parasitosis among hilltribe people and soil contamination in Nan Province, Northern Thailand. J. Trop. Med. Parasitol., 25, 30-37.