Infectious risks associated with outdoor sports activities.

In France, outdoor sports and activities account for 36% of sports engagement, making outdoor venues the most popular settings for sports participation. Discussing the links between sports and health almost always highlights the beneficial impact of engaging in sports. However, due to a lack of specific notifications, infectious risks are not subject to epidemiological monitoring, and need to be better understood. Since the practice of outdoor sports has become part and parcel of many individuals' daily routines, it is essential to more accurately characterize the knowledge we have gained about the risks associated with exposure. However, directly associating the practice of a sport with an elevated risk of infectious diseases is a challenging endeavor. Sociological factors based on risk awareness and adoption of protective behaviors in response to the risk are crucial to the orientation of prevention efforts. This review deals with several (bacteriological, viral, parasitic, and mycological) infectious risks related to outdoor activities practiced in a natural field via contamination routes such as tick-bite, enteric pathogen, skin, and aerosol transmission. We have also detailed a number of preventive measures taking into account the outdoor setting (e.g., vaccination).

Underdiagnosis of arbovirus infections in returned travelers in an area with growing circulation of Aedes albopictus in North-Eastern France.

BACKGROUND: Vector-borne diseases such as malaria and arboviruses are common etiologies of post-travel fever. METHODS: After excluding malaria, we retrospectively analyzed the diagnosis of dengue virus (DENV), chikungunya virus (CHIKV), and zika virus (ZIKV) infections following recent travel by patients treated at the Strasbourg University Hospital between 2014 and 2023. Available serums (n = 35) sampled in 2023 were retrospectively tested for DENV, CHIKV, and ZIKV infections. RESULTS: Our results showed that 78% of the 915 malaria-negative patients without changes over the course of ten years had not undergone arbovirus infection testing. Retrospective testing revealed missing arbovirus infections: two DENV infections and one CHIKV infection, representing 8.6% (3/35) of patients for whom no mandatory declaration or vector control could be undertaken. CONCLUSION: Our results highlight the need for early case detection, particularly in the context of the upcoming 2024 Olympic Games.