Vaginitis is a common infection among adolescent and young adult women, characterized clinically by pruritus, irritation and burning sensations, and vaginal discharge. Approximately three-fourths of adolescent girls' experience vaginitis during their lifetime; many of them have experienced their first Vaginitis is a common infection among adolescent girls, characterized clinically by pruritus during adolescence.

Objectives: To assess the level of knowledge regarding vaginitis and its prevention among adolescent girls in selected higher secondary schools, Satna. To evaluate the effectiveness of the structured teaching program on knowledge regarding vaginitis and its prevention among adolescent girls in selected higher secondary schools, Satna and to find out the association between the pretest level of knowledge regarding vaginitis and its prevention among adolescent girls with their selected socio demographic variables.
Methodology: Quantitative research approach used for the study and one group pretest post-test was selected as research design. The 40 adolescent girls from higher secondary school, Satna (M.P) were selected as sample for the study. The pre-test was conducted by using structed knowledge questionnaire regarding vaginitis and its prevention and the same day was planned for the teaching programme. After 7 days, post test was conducted for the same group of adolescent girls to asses the effectiveness of structured teaching programme. The study participant was selected by simple random sampling technique.
Results: The mean in the post test is 22.8 whereas the mean in the pretest is 11.5. The variation in posttest when compared to pretest. SD in the post test is 1.4 and in pretest is 1.8. the mean improvement is 11.3. The posttest knowledge score was more than the pretest knowledge score, and. The calculate t-value is 37.3 which are significant. The result confirms that the STP significantly was effective in improving the knowledge on vaginitis and its prevention among adolescent girls.

Keywords: Effectiveness, Structured teaching programme, Vaginitis and its prevention, Adolescent girls