The European Centre for Disease Prevention and Control (ECDC) has published its annual epidemiological report on diphtheria for 2018. In total, 63 cases of diphtheria were reported, 62 of which were due to toxigenic Corynebacterium diphtheriae (C. diphtheriae) or Corynebacterium ulcerans (C. ulcerans), with one case having an unknown pathogen.
The highest proportion of C. ulcerans cases was among adults aged 65 years and over, whereas C. diphtheriae cases were more common in younger age groups. Among the C. diphtheriae cases, 60% were reported as imported.
Source: ECDC, 3 February 2021