1 Department of Medical Biochemistry and Microbiology, Zoonosis Science Centre, Uppsala University, Uppsala 751 23, Sweden; Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden; Department of Biosciences, International Livestock Research Institute, Hanoi, Vietnam. Electronic address: johanna.lindahl@imbim.uu.se.
2 Department of Medical Sciences, Zoonosis Science Centre, Uppsala University, Uppsala 751 23, Sweden.
3 Department of Medical Biochemistry and Microbiology, Zoonosis Science Centre, Uppsala University, Uppsala 751 23, Sweden.