The UK Health Security Agency (UKHSA) reported a 11.4% increase in Giardia cases in England in 2025, reaching 6,069 cases—the highest since 2016. London recorded the most cases (1,568), followed by the North West (1,029). Cases peaked in autumn, with October (599), September (580), and November (574) reporting the highest monthly totals. The UKHSA attributes the rise to factors including improved testing, increased travel post-pandemic, and environmental changes. Giardia, a parasitic infection causing diarrhoea and other symptoms, spreads through contaminated food/water or person-to-person contact. Travelers are advised to drink bottled water and avoid raw foods. Prevention includes handwashing and avoiding contaminated water sources. The agency urges prompt medical attention for severe symptoms or dehydration.
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Original source: https://www.gov.uk/
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