Volume 11, Number 11, November 2005

Norovirus Outbreaks from Drinking Water

Leena Maunula,*† Ilkka T. Miettinen,‡ and Carl-Henrik von Bonsdorff*†
*HUCH Laboratory Diagnostics, Helsinki, Finland; †University of Helsinki, Helsinki, Finland; and ‡National Public Health Institute, Kuopio, Finland

Figure 3. Phylogenetic trees derived from 28 norovirus nucleotide sequences from the polymerase region. The nucleotide sequences were from 10 water and 18 patient samples of 14 outbreaks. Trees were constructed by using the neighbor-joining method with the ClustalW software package. Scale indicated by bars. Branch lengths are related to degree of divergence between sequences.

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This page last reviewed October 3, 2005

Emerging Infectious Diseases Journal
National Center for Infectious Diseases
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