| association of community sanitation usage with soil-transmitted helminth infections among school-aged children in amhara region, ethiopia. | globally, in 2010, approximately 1.5 billion people were infected with at least one species of soil-transmitted helminth (sth), ascaris lumbricoides, trichuris trichiura, hookworm (ancylostoma duodenale and necator americanus). infection occurs through ingestion or contact (hookworm) with eggs or larvae in the environment from fecal contamination. to control these infections, the world health organization recommends periodic mass treatment of at-risk populations with deworming drugs. prevention ... | 2017 | 28212668 |