Effectiveness of simulated interventions in reducing the estimated prevalence of E. coli O157:H7 in lactating cows in dairy herds Bouda Vosough Ahmadi, Klaas Frankena, Joanne Turner, Annet G.J. Velthuis, Henk Hogeveen and Ruud B.M. HuirneVet. Res., 38 5 (2007) 755-771DOI: https://doi.org/10.1051/vetres:2007029