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Reported Tuberculosis in the United States, 2013

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Table 23. Tuberculosis Cases by Cluster Status1: United States, 2011–2013

Cluster Status Cases
No. (%)
Total 21,702 (100.0)
Unique2 17,077 (78.7)
Clustered3 4,625 (21.3)

1 Cluster status indicates whether a case is unique or clustered within a county for cases with a valid GENType.

2 A unique case is a case with a GENType (spoligotype and 24 locus mycobacterial interspersed repetitive unit-variable number tandem repeat type) that does not match any other case in that county during the specified three-year time period.

3 Clustered cases are defined as two or more cases with same GENType within a county during the specified 3-year time period.

Note: See Surveillance Slide #34

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