238 Ch 238. Soil-Transmitted Helminths (STH)

~ 1.5 billion infections worldwide (mostly pediatric); fecal-oral / skin penetration; 4 main: Ascaris (giant roundworm), hookworm (Necator + Ancylostoma — anemia), Strongyloides (chronic + life-threatening hyperinfection in immunocompromise), Trichuris (whipworm); albendazole + mebendazole for most; ivermectin for Strongyloides; WHO mass deworming programs annual / biannual for endemic schoolchildren。