1. Veterinary Faculty, University of León, 24071 León, Spain
2. High School of Microbiology and Food Safety, University of Western Brittany, Technopôle Brest-Iroise, 29280 Plouzané, France
3. Higher Technical School of Agricultural Engineering, Polytechnic University of Cartagena, Cartagena, Spain
4. Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland