Sexually transmitted diarrhoea spreading rapidly among some networks of gay men in the UK, study finds Fred Lewsey Thu, 07/09/2026 - 00:01 Variants of sexually-transmitted Shigella – a bacterial infection that causes bloody or prolonged diarrhoea and can lead to severe dehydration – are causing more disease and becoming increasingly antibiotic-resistant among sections of the UK’s LGBTQ+ community, a new Cambridge study has found. The research shows that between 2015 and 2020, sexually transmitting forms of Shigella in the UK grew 15% faster year-on-year than variants contracted through traditi