Results: A total of 306 students (from primary education levels 4—6) from five pri-mary schools in the community were included in the study. Of a total of 15 items on the basic dengue questionnaire, only five were answered correctly by more than 80%of the students. Most of the knowledge items showed statistically significantly dif-ferent distributions of correct, incorrect, and unknown answers (P ≤ 0.05, P ≤ 0.01,and P ≤ 0.001). The larval indices surveyed in the five schools and in 302 student households showed a high risk of dengue, with high indices in the five schools(Breteau Index: BI = 200; House Index: HI = 60; and Container Index: CI = 7.94) and in the students’ households (BI = 754; HI = 77; and CI = 35).