Brgy. Tagnao is one of the 34 barangays in Gandara, Samar infected with Schistosomiasis. Said disease is caused by parasitic worms due to exposure to infested water. According to the Local Government Unit of Gandara, Schistosomiasis is prevalent in the municipality due to  poor sanitation and lack of basic toilet facilities. “Matagal na naming problema continue reading : DSWD Kalahi-CIDSS supports ‘ZOD campaign’ with WASH project