Determine the actual situation and factors related to human Strongyloides spp infection in Duc Hoa district, Long An province in 2017-2018. Describe the clinical symptoms, para-clinical and evaluate results of treatment for strongyloidiasis by ivermectin single dose. | Summary of PhD thesis in Medicine Studying the actual situation various factors related to human Strongyloides spp infection and ivermectin effectiveness in Duc Hoa district Long An province 2017 2018