Many households used chloramine, iodine solution (10%), or powdered lime for cleaning pig-pen floors; all three disinfectants are produced in Vietnam. On 17% of
the farms disinfectants were used once per month, while others used disinfectants 2–6 times per month. On 35% of the farms disinfectants were never used. Two farmers
said that they used disinfectants for purposes of both disinfecting and deodourising.