Authors: Wedderkopp, A Gradel, KO Jorgensen, JC Madsen, M

Citation: A. Wedderkopp et al., Pre-harvest surveillance of Campylobacter and Salmonella in Danish broilerflocks: a 2-year study, INT J F MIC, 68(1-2), 2001, pp. 53-59

Authors: Gradel, KO Feld, NC Andersen, JS

Citation: Ko. Gradel et al., Serologic reactions against Salmonella in samples from broiler parent stock with and without preceding colibacillosis: A case-control study, AVIAN DIS, 45(2), 2001, pp. 486-491

Authors: Feld, NC Ekeroth, L Gradel, KO Kabell, S Madsen, M

Citation: Nc. Feld et al., Evaluation of a serological Salmonella Mix-ELISA for poultry used in a national surveillance programme, EPIDEM INFE, 125(2), 2000, pp. 263-268