T Sixt1, J Bador2, L Amoureux2, L Piroth1, M Blot1,3. 1. Infectious Diseases Department, Dijon, France. 2. Bacteriology Department, François Mitterrand University Hospital, Dijon, France. 3. L.N.C. Lab, U.M.R. 1231, I.N.S.E.R.M., Faculty of Health Sciences, University of Burgundy, Dijon, France.