Knowledge and practice related to trachoma among children in Vietnam: a cross-sectional study.

A cross-sectional descriptive survey to determine the magnitude and determinants of knowledge and practice in relation to trachoma among children in Vietnam is presented. Interviews were conducted with 358 children ages 6 to 15 years in three districts of Northern Vietnam using a closed-ended questionnaire. Responses related to causes, prevention methods, consequences, and observed preventive practices were standardized.