monde20 °CThis parasite, harmless to humans, thrives in waters above 20°C✓ Confirmed · 2 sources

Switzerland: 'duck flea' proliferates in lakes due to heatwaves

Repeated heatwaves in Switzerland have warmed lakes, encouraging the proliferation of the 'duck flea'.

Published 16sem2 sources✓ Confirmedupdated 9sem

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The fact

This parasite, harmless to humans, thrives in waters above 20°C.

Health authorities urge vigilance to limit ecological risks.

2 sources — click a link to read an article on the topic:

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Auto-synthesis from 2 media sources · identified on July 18, 2026