Distribution of 148 cohort clusters, by number of cases and outcome.

<p>Cohort composed of incident tuberculosis genotype clusters of 3 or more cases identified by SaTScan from 2006 to 2010, meeting inclusion criteria. Clusters with 10 or more cases are grouped into one bar. Outcome of the cluster could be confirmed as an outbreak, confirmed as not an outbreak, or unable to be confirmed (uncertain).