Brote comunitario de legionelosis asociado a un espectáculo itinerante con efectos acuáticos: investigación y propuestas de mejora

In November 2022, five cases of pneumonia caused by Legionella pneumophila were identified among attendees of a traveling circus show featuring water-based stage effects. The investigation revealed environmental exposure in a mobile recreational installation that was neither registered nor subjected to health inspections. Active case finding was conducted through public health surveillance networks and interregional collaboration. Subsequently, Legionella was detected in reused components at other cities along the tour route. The absence of prior inspections and health declarations for such events limited the ability to anticipate and respond to the outbreak. This experience highlights the lack of specific regulation for temporary activities with aerosolization risks and suggests their inclusion in regional registries of high-risk installations. The need to strengthen risk-based surveillance in emerging recreational settings is emphasized.