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Mumps outbreak in young adults following a festival in Austria, 2006

D Schmid1, H Holzmann, C Alfery

  • 1Austrian Agency of Health and Food Safety (AGES), Vienna, Austria.

Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin
|May 1, 2008
PubMed

Insights

A 2006 mumps outbreak in Austria primarily affected unvaccinated or single-dose vaccinated individuals. Improved childhood vaccination rates over 15 years were noted, with vaccination scheme failure identified as the main cause.

Area of Science:

  • Epidemiology
  • Public Health
  • Immunology

Background:

  • Mumps is not a mandatory notifiable disease in Austria.
  • An increase in mumps cases was detected in Carinthia in May 2006.
  • The Austrian Reference Laboratory for Measles, Mumps, and Rubella (MMR) identified the cluster.

Purpose of the Study:

  • To investigate an epidemiological cluster of mumps cases in Austria.
  • To determine the vaccination status of affected individuals.
  • To identify factors contributing to the mumps outbreak.

Main Methods:

  • An epidemiological investigation was conducted.
  • Case definitions were established for outbreak classification.
  • Laboratory confirmation and epidemiological linkage were used.
  • Vaccination status was assessed for affected individuals.

Main Results:

  • A total of 214 cases met the outbreak case definition (143 laboratory-confirmed, 71 epidemiologically linked).
  • Vaccination status was known for 169 cases: 49% unvaccinated, 40% received one dose, 11% received two doses.
  • Only four cases occurred in children aged 14 or younger, suggesting improved childhood vaccination coverage.
  • Vaccination scheme failure, not vaccine failure, was identified as the primary cause.

Conclusions:

  • The mumps outbreak in Carinthia was largely due to vaccination scheme failure.
  • Improved childhood vaccination coverage over the past 15 years was observed.
  • Public health strategies should focus on ensuring adherence to the complete vaccination schedule.

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