Figure 2. Origin and country of report for the largest European cluster of multidrug-resistant tuberculosis cases (cluster E0051). The cases were reported in 12 European countries (see Table 3). Five countries did not have information about the origin of the cases reported there. For cases reported in the countries shaded in dark gray, the base of the arrow shows where case-patients originated (1 case per arrow, unless otherwise indicated). The 6 case-patients reported in Lithuania were also born there. Of the 148 case-patients reported in Estonia, 119 were also born there. The remaining case-patients reported in Estonia were originally from Russia (13), Belarus (6), Ukraine (5), Lithuania (1) and Turkmenistan (1); origin was unknown for 3 case-patients.