Participatory development of strategies to combat congenital syphilis: action research.

OBJECTIVE: to describe the development of a strategic action plan to combat congenital syphilis, carried out in a participative manner with professionals from the Health Care Network. METHOD: qualitative research, using an action research approach based on Freire's framework. Conducted in a municipality in the interior of São Paulo, it involved 56 health professionals. The absence of local strategies and epidemiological data led to the holding of a workshop in three meetings. The activities were recorded on murals, written evaluations, and field diaries, and analyzed using Content Analysis. RESULTS: the meetings promoted the involvement of professionals, revealed weaknesses in the management of syphilis, and prompted the formulation of proposals, such as restructuring testing and diagnosis flows, timely prescription and treatment, active search, monitoring tests, treatment of partners, and adequate management of syphilis cases in pregnant women. Three categories emerged, and as a final product, a strategic action plan was developed to address congenital syphilis with practical applicability in the network's services. CONCLUSION: the collaborative process strengthened professionals' autonomy and co-responsibility, integrating technical knowledge and local experience. The plan has been implemented and has contributed to improving the response to congenital syphilis within the Brazilian Unified Health System.