A Follow-up Study on Trichinellosis in Mae Hong Son Province, Thailand 

Ponganant Nontasut1, Sukvannee Chullawichit2, Adulsak Vichit3, Nimit Morakote4 
1Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; 2Hospital for Tropical Diseases, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; 3Division of Communicable Diseases Control, Ministry of Public Health, Region 10, Chiang Mai 50200, Thailand; 4Department of Parasitology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand 

Abstract 
A follow-up investigation was carried out in three persons infected with trichinellosis 6 months earlier at Thum Lod, Pang Ma Pha, Mae Hong Son province. Their ELISA values on IgG antibody were much higher than the cut-off value. Serological survey of 73 pigs in the village using indirect ELISA was negative.