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Figure 1. A), Potential foci of mosquitoborne viruses in the Mělník
area. Floodplain forests identified on the Landsat MSS satellite images
(dotted red line), with hydrology and settlement in background (DMU-200,
VTOPÚ Dobruška), and proportion of Tahyna virus seropositive residents
at particular localities (large, medium, and small circles indicate the
risk zones A, B, and C, respectively). B) [inset] radar satellite image
of the conflux of the Labe and Vltava Rivers on August 17, 2002 (2 days
after the flood culmination), showing extent of floodwater (dark areas).
Inundated forests, with subsequent mass occurrences of Ochlerotatus
and Aedes mosquitoes, are visible as lighter areas surrounding
the Labe River upstream of the confluence; scattered lagoons (dark areas)
in arable fields along both rivers far left and right turned into breeding
sites of predominantly Culex mosquitoes.
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