| schmallenberg virus: a seroprevalence survey in cattle and sheep, france, winter 2011-2012. | in france, a national surveillance plan to monitor congenital schmallenberg virus (sbv) outbreaks was set up in january 2012, and has shown that sbv had become widespread throughout the country since mid-2011. however, the number of sbv-infected farms cannot accurately be estimated through congenital sbv reporting alone. therefore, gds france (national animal health farmers' organization) conducted serological investigations in cattle and sheep holdings in several departments in spring 2012 to a ... | 2013 | 23804407 |