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Ongoing toxin-positive diphtheria outbreaks in a federal asylum centre in Switzerland, analysis July to September
Jacob Kofler1, Alban Ramette2, Patricia Iseli3
1Cantonal Medical Office, Health Directorate of the Canton of Bern, Bern, Switzerland.
Abstract:
Two diphtheria outbreaks occurred in a Swiss asylum center from July to October 2022, one is still ongoing. Outbreaks mainly involved minors and included six symptomatic respiratory diphtheria cases requiring antitoxin. Phylogenomic analyses showed evidence of imported and local transmissions of toxigenic strains in respiratory and skin lesion samples. Given the number of cases (n = 20) and the large genetic diversity accumulating in one centre, increased awareness and changes in public health measures are required to prevent and control diphtheria outbreaks.
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