www.eurosurveillance.org Vol. 15 | Weekly issue 6 | 11 February 2010 Europe’s leading journal on infectious disease epidemiology, prevention and control Rapid communications Outbreaks of gastroenteritis linked to lettuce, Denmark, January 2010 2 by S Ethelberg, M Lisby, B Böttiger, AC Schultz, A Villif, T Jensen, KE Olsen, F Scheutz, C Kjelsø, L Müller Impact of the 2009 inluenza A(H1N1) pandemic wave on the pattern of hibernal respiratory virus epidemics, France, 2009 5 by JS Casalegno, M Ottmann, M Bouscambert-Duchamp, M Valette, F Morin, B Lina Low acceptance of vaccination against the 2009 pandemic inluenza A(H1N1) among healthcare workers in Greece 8 by G Rachiotis, VA Mouchtouri, J Kremastinou, K Gourgoulianis, C Hadjichristodoulou Research articles Household transmissibility and other characteristics of seasonal oseltamivir-resistant inluenza A(H1N1) viruses, Germany, 2007-8 15 by U Buchholz, S Brockmann, S Duwe, B Schweiger, M an der Heiden, B Reinhardt, S Buda Surveillance and outbreak reports Microbiological and molecular investigation of an increase of human listeriosis in Belgium, 2006-2007 21 by M Yde, N Botteldoorn, S Bertrand, JM Collard, K Dierick