Visits on 'lamb-viewing days' at a sheep farm open to the public was a risk factor for Q fever in 2009.

J. WHELAN *, B. SCHIMMER , A. DE BRUIN, M. ROBERT-DU RY VAN BEEST HOLLE 1, W. VAN DER HOEK1 AND R. TER SCHEGGET3 1 Centre for Infectious Disease Control, National Institute for Public Health and the Environment, RIVM, Bilthoven, The Netherlands 2 European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden 3 Municipal Health Service Brabant-Zuidoost, Eindhoven, The Netherlands