The recent incidents involving illness among Olympic triathlon competitors in Paris have raised concerns about the water quality in the Seine River. While initial reports suggested that Belgian athlete Claire Michel was infected with E. coli bacteria, other sources have not confirmed this claim. Team Belgium clarified that Michel was taken to the polyclinic in the Olympic Village and released, refuting rumors of ongoing hospitalization.
The cancellation of two test runs due to high bacteria levels in the water prior to Michel's illness has led to speculation about pollution in the Seine River. However, only a few other triathletes have reported illnesses, with no clear link to their swimming in the river. Adrien Briffod fell ill with a stomach infection, Simon Westermann became sick without swimming in the Seine, and Norwegian Vetle Bergsvik Thorn developed vomiting after competing in the triathlon, possibly due to food poisoning.
The Seine River has a history of pollution, with overflowing sewage pipes contaminating the water after heavy rains. Despite daily testing showing E. coli levels below the World Triathlon Federation limits, concerns remain about the comprehensive E. coli count, which includes bacteria aggregated with sewage particles.
Incubation periods for infections such as leptospirosis, cryptosporidium, and hepatitis A and E could be a concern for competitors in the coming days. While most wound infections from polluted water would have likely occurred by now, atypical organisms could still emerge.
Overall, the exact cause of the illnesses among triathletes remains unclear, and further investigation is needed to determine if the Seine River is to blame. The World Triathlon Federation may need to consider adjusting its threshold for water quality testing to include comprehensive E. coli levels. As the situation continues to develop, it is essential to prioritize the health and safety of all athletes participating in the Paris 2024 Olympic Games.