Abstract
Objective: to assess the knowledge of multiprofessional teams in primary care settings in northeastern Brazil regarding patient safety. Method: this cross-sectional study involved 78 healthcare professionals from primary care centers between March and June 2023. Data were collected using three instruments: a sociodemographic and professional profile questionnaire developed for this study, a validated tool to assess knowledge of patient safety, and a validated instrument to identify incident occurrence. Statistical analysis included descriptive methods. Results: the findings revealed important gaps in patient safety knowledge, particularly regarding managerial responsibility and its influence on safety culture. Additionally, one-quarter of participants reported witnessing incidents in their work environment, primarily related to vaccination and medication administration. Conclusion: the study highlights the occurrence of incidents in primary healthcare and significant gaps in professionals' knowledge of patient safety. Strengthening safety culture and investing in continuous professional education are essential to reduce errors and improve patient outcomes.

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