Introduction: The incidence of STI-HIV/AIDS is on the rise, making adolescents a vulnerable group at risk.
Objective: To increase the knowledge and perception of risk about STI-HIV/AIDS, through Educational Intervention in students of the Polytechnic Institute ¨Hermanos Gómez¨ of the Municipality San José de las Lajas, Mayabeque Province.
Method: Quasi-experimental study, intervention at the ¨Hermanos Gómez Polytechnic Institute, of the Municipality of San José de la Lajas, through affective, participatory, animation and reflection techniques, the universe being made up of 17 students aged 16-17 years of specialty in Industrial Chemistry, during the period from December 2014 to November 2015. The variables used were: knowledge about STI-HIV/AIDS and perception of risk towards said diseases.
Results: after the intervention, an increase in the level of knowledge of the main STIs in the study was evident: Syphilis, Condylomas, HIV/AIDS, Gonorrhea, Trichomonas, Candida Albicans and Herpes simplex, which were adequately identified by 60%; 71% recognized the routes of sexual transmission, 60% the typical clinical manifestations, an increase in the levels of knowledge about the use of condoms to prevent STIs, and in the same way the perception of risk in an 83% after the intervention.
Conclusion: After the intervention, there was an increase in knowledge of STIs, transmission routes, clinical manifestations, condom use, and risk perception.