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Volume 20, Number 4—April 2014

Research

Large Outbreak of Cryptosporidium hominis Infection Transmitted through the Public Water Supply, Sweden

Micael WiderströmComments to Author , Caroline Schönning, Mikael Lilja, Marianne Lebbad, Thomas Ljung, Görel Allestam, Martin Ferm, Britta Björkholm, Anette Hansen, Jari Hiltula, Jonas Långmark, Margareta Löfdahl, Maria Omberg, Christina Reuterwall, Eva Samuelsson, Katarina Widgren, Anders Wallensten, and Johan Lindh
Author affiliations: Umeå University, Umeå, Sweden (M. Widerström, M. Lilja, M. Ferm C. Reuterwall, E. Samuelsson); Jämtland County Council, Östersund, Sweden (M. Widerström, M. Omberg); Public Health Agency of Sweden, Soina, Sweden (C. Schönning, M. Lebbad, G. Allestam, B. Björkholm, A. Hansen, J. Långmark, M. Löfdahl, K. Widgren, A. Wallensten, J. Lindh); Mid Sweden University, Östersund, (T. Ljung,); Östersund Municipality, Östersund (J. Hitula); and Karolinska Institutet, Stockholm (J. Lindh)

Main Article

Table 1

Distribution of survey respondents and attack rate in Cryptosporidium infection outbreak, Östersund, Sweden, 2010–2011

Age group, y No. respondents (%)
Attack rate %
All Female Male All Women Men p value
0–9 115 (67.3) 58 (67.4) 57 (67.1) 50.9 42.6 58.9 0.09
10–19 117 (66.5) 58 (61.1) 59 (72.8) 47.2 55.6 38.5 0.08
20–29 103 (48.8) 57 (53.8) 46 (43.8) 58.0 58.2 57.8 0.97
30–39 110 (55.8) 58 (60.4) 52 (51.5) 52.8 51.9 53.8 0.84
40–49 150 (66.7) 71 (70.3) 79 (63.7) 55.0 52.9 57.0 0.62
50–59 145 (79.2) 85 (84.2) 60 (73.2) 42.1 45.1 37.9 0.40
60–69 148 (89.2) 81 (90.0) 67 (88.2) 35.3 41.3 27.6 0.10
>69 156 (87.2) 95 (88.8) 61 (84.7) 26.1 24.4 28.8 0.57
Total 1,044 (69.2) 563 (72.0) 481 (66.3) 45.2 45.1 45.4 0.94

Main Article

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