Bavarian Health and Food Safety Authority (LGL), Veterinaerstr. 2, 85764, Oberschleissheim, Germany. sven.pecoraro@lgl.bayern.de.|Bavarian Health and Food Safety Authority (LGL), Veterinaerstr. 2, 85764, Oberschleissheim, Germany. sven.pecoraro@lgl.bayern.de.|Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg 412 96, Sweden. nielsenj@chalmers.se.