KNOWLEDGE, PRACTICE ON USING THE TOILETS TO PREVENTION TRANSMITED DISEASES OF PEOPLE IN TWO VILLAGES / WARDS SON LA CITY 2015 Cross-sectional study on 403 people households in Son La city (201 of Chieng Sinh Ward and 202 people Chieng Den villages) found: Most people know the role of sanitary latrines are safe disposal full accounting for 68.2%; cleanliness was 24.4%.