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Volume 20, Number 4—April 2014

Research

Underdiagnosis of Foodborne Hepatitis A, the Netherlands, 2008–20101

Mariska PetrignaniComments to Author , Linda Verhoef, Harry Vennema, Rianne van Hunen, Dominique Baas, Jim E. van Steenbergen, and Marion P.G. Koopmans
Author affiliations: Municipal Health Service Zoetermeer, Zoetermeer, the Netherlands (M. Petrignani, R. van Hunen); National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands (L. Verhoef, H. Vennema, D. Baas, J.E. van Steenbergen, M.P.G. Koopmans); Erasmus Medical Center, Rotterdam, the Netherlands (M.P.G. Koopmans); Leiden Medical University, Leiden, the Netherlands (J.E. van Steenbergen)

Main Article

Table 2

Description of reported patients with hepatitis A virus infection, by age group, the Netherlands, 2008–2010

Age group, y Reported Male, no. (%) Incidence 2008–09* Incidence 2009–10* Sequenced, no. (%)†
0–9 78 41 (52.6) 1.6 2.4 29 (37.2)
10–19 74 37 (50.0) 2.5 1.3 48 (64.9)
20–29 73 36 (49.3) 1.7 2.0 43 (58.9)
30–39 56 35 (62.5) 1.3 1.2 42 (75.0)
40–49 79 49 (62.0) 1.4 1.7 55 (69.6)
50–59 36 18 (50.0) 0.6 1.0 23 (63.9)
60–69 17 7 (41.2) 0.5 0.5 7 (41.2)
70–79 5 3 (60.0) 0.3 0.2 1 (20.0)
80–89 3 3 (100.0) 0.0 0.5 0 (0.0)
Total 421 229 (54.4) 1.2 1.3 248 (59.0)

*Cases/100.000 population, by age category.
†Number and proportion of cases for which typing data could be obtained.

Main Article

1Preliminary results of this study were presented at the 15th Annual Meeting of the European Society for Clinical Virology; 2012 September 4–7; Madrid, Spain.

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