tips Investigation of the high rates of extrapulmonary tuberculosis in Ethiopia reveals no single driving factor and minimal evidence for zoonotic transmission of Mycobacterium bovis infection March 3, 2015 BMC Infectious Diseases 2015, 15:112Â doi:10.1186/s12879-015-0846-7 Stefan Berg, Esther Schelling, Elena Hailu and Rebuma Firdessa contributed equally to this work. Published: 3 March 2015