Preliminary investigation of a significant national Cryptosporidium exceedance in the United Kingdom, August 2023 and ongoing separator

Peake et al describe the initial investigation into an unprecedented and ongoing nation-wide increase in cases of cryptosporidiosis, first noted in Aug 2023, and present findings from early descriptive analyses. Responses to surveillance questionnaires suggest many cases may relate to international travel, most notably to Spain and other Mediterranean countries. The exceedance may in part reflect increasing summer travel to the European continent in 2023, although travel trend data are not yet available for this year. Initial findings would suggest that swimming, including the use of pools, and foreign travel to a variety of destinations may underlie the current increase.