Increased number of cryptosporidiosis cases with travel history to Croatia might be related to swimming pools, Germany, 2023

Published on January 8, 2024

On 25 September 2023, the federal state public health authority of Rhineland-Palatinate was informed by one local health authority about one laboratory-confirmed case of cryptosporidiosis (index case) and three epidemiologically linked cases, who had all spent a vacation in a camping resort in Istria, Croatia, during their incubation period (1–12 days). There were further anecdotal reports of cases with similar symptoms among other members of this travel group.

Cryptosporidiosis is characterised by watery diarrhoea, nausea, vomiting, abdominal pain and fever. Past outbreaks in Europe and the United States have been associated with contaminated food or drink and with recreational water. The aims of this investigation were (i) to a assess whether there was a significant increase in cryptosporidiosis cases with potential exposure in Croatia and (ii) to identify the most likely cause of infection using information from case interviews.

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