Discrepancies between the isolation of Salmonella from mesenteric lymph nodes and the results of serological screening in slaughter pigs Nathalie Nollet, Dominiek Maes, Luc Duchateau, Veerle Hautekiet, Kurt Houf, Jan Van Hoof, Lieven De Zuttera, Aart De Kruif and Rony Geers Vet. Res., 36 4 (2005) 545-555 DOI: 10.1051/vetres:2005014