RT Generic T1 Red swamp crayfish collecting: a risk activity for leptospirosis. A1 Gomez-Martin, M A1 Lozano, C A1 Luque, R A1 Luque-Romero, L A1 Rodriguez-Benjumeda, L A1 Aznar-Martin, J K1 Antibodies, Bacterial K1 Humans K1 Male K1 Risk Factors K1 Seroepidemiologic Studies AB Leptospirosis , commonly known as ‘ rat fever ’, is a worldwide zoonotic illness caused by the Leptospira genus [1,2]. Isla Mayor is a municipality in Seville, Spain , with a total population of 5911 inhabitants; it is surrounded by over 24 000 hectares of rice fields. It forms part of the Doñana National Park ecosystem , an area protected for its biodiversity , where no chemical substances may be used which might harm this natural environment . An increase in the rat population associated with the richness of the ecosystem and limitations on the use of biocides have made Isla Mayor a perfect breeding ground for Leptospira infection among wetland workers , especially rice labourers and collectors of red swamp crayfish ( Procambarus clarkii). PB Elsevier Ltd YR 2020 FD 2020-03-26 LK http://hdl.handle.net/10668/15301 UL http://hdl.handle.net/10668/15301 LA en NO Gómez-Martín M, Lozano C, Luque R, Luque-Romero L, Rodríguez-Benjumeda L, Aznar-Martin J. Red swamp crayfish collecting: a risk activity for leptospirosis. Clin Microbiol Infect. 2020 Aug;26(8):1103-1104. DS RISalud RD Aug 6, 2025