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 Tahya 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 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.