An outbreak of Shigella dysenteriae in Sweden, May–June 2009, with sugar snaps as the suspected source Löfdahl, M and Ivarsson, S and Andersson, S and Långmark, J and Plym-Forshell, L, Eurosurveillance, 14, 19268 (2009), https://doi.org/10.2807/ese.14.28.19268-en