Fig. 1From: Mycobacterium tuberculosis transmission in an ethnically-diverse high incidence region in England, 2007–11Description of tuberculosis cases in the West Midlands during 2007–11 and their genotyping results. The grey boxes refer to cases who were included in the analyses based on 24-locus MIRU-VNTR. The sum of the cases in these grey boxes therefore gives the 2159 cases that were eligible for risk factor analysis mentioned in the textBack to article page