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Volume 14, Number 3—March 2008

Research

Genetic Variability of West Nile Virus in US Blood Donors, 2002–2005

Andriyan Grinev*, Sylvester Daniel*, Susan Stramer†, Susan Rossmann‡, Sally Caglioti§, and Maria Rios*Comments to Author 
Author affiliations: *Food and Drug Administration, Bethesda, Maryland, USA; †American Red Cross, Gaithersburg, Maryland, USA; ‡Gulf Coast Regional Blood Center, Houston, Texas, USA; §Blood System Laboratories, Tempe, Arizona, USA;

Main Article

Figure 2

Distance analysis of envelope glycoprotein of West Nile virus isolates collected during 1999–2006 epidemics in the United States. Phylogram is based on maximum parsimony analysis of complete nucleotide sequences of the envelope gene. Diamonds indicate isolates from this study. All isolates from clade 2 (WN02 strain) contained conserved mutations at positions 1442 (T → C) and 2466 (C → T). Values near branches represent percentage support by parsimony bootstrap analysis. Scale bar represents a 1-nt change.

Figure 2. Distance analysis of envelope glycoprotein of West Nile virus isolates collected during 1999–2006 epidemics in the United States. Phylogram is based on maximum parsimony analysis of complete nucleotide sequences of the envelope gene. Diamonds indicate isolates from this study. All isolates from clade 2 (WN02 strain) contained conserved mutations at positions 1442 (T → C) and 2466 (C → T). Values near branches represent percentage support by parsimony bootstrap analysis. Scale bar represents a 1-nt change.

Main Article

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