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Reported Tuberculosis in the United States, 2012

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Table 24. Tuberculosis Cases and Clusters by Cluster Size1: United States, 2010–2012

Cluster Status Clusters Cases2
No. (%)3 No. (%)4

Total

1,542

(100.0)

4,723

(100.0)

2-case cluster

996

(64.6)

1,992

(42.2)

3-case cluster

257

(16.7)

771

(16.3)

4–9 case cluster

250

(16.2)

1,272

(26.9)

10–19 case cluster

30

(2.0)

365

(7.7)

≥20 case cluster

9

(0.6)

323

(6.8)

 

1 Clusters have two or more cases with matching spoligotype and 24-locus locus mycobacterial interspersed repetitive unit-variable number tandem repeat type (GENType) within a county during the specified 3-year time period.

2 Cases with matching spoligotype and 24-locus locus mycobacterial interspersed repetitive unit-variable number tandem repeat type (GENType) are members of a cluster within a county during the specified 3-year time period.

3 Denominator is total number of clusters

4 Denominator is total number of cases

Note: See Surveillance Slide #35

 
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