蛔虫
The six most common NTDs include soil-transmitted helminths (STHs)—specifically roundworm ("Ascaris lumbricoides"), whipworm ("Trichuris trichiura") and hookworms ("Necator americanus" and "Ancylostoma duodenale")—schistosomiasis, trachoma, and lymphatic filariasis (LF). These diseases affect one-sixth of the world's population with 90 percent of the disease burden occurring in sub-Saharan Africa.