Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Each circle represents a site while the colour and size of the circle indicates the frequency of positive ovitraps at that site. Missing slats were excluded from the analysis. Map source: Swiss Federal Office of Topography (swisstopo) and Swiss Federal Statistical Office, Section Geoinformation (GEOSTAT).
