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Tuberculosis (TB)





Reported Tuberculosis in the United States, 2020						Print
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Table 25. Tuberculosis Cases and Clusters, by Cluster Size: United States, 2018–2020
See Surveillance Slide #68
Table 25. Tuberculosis Cases and Clusters, by Cluster Size: United States, 2017-2019
Cluster Size
Clusters1
Cases2n
(%)3
n
(%)4Total
1,280
(100.0)
3,687
(100.0)2-case cluster
860
(67.2)
1,720
(46.7)3-case cluster
215
(16.8)
645
(17.5)4-case cluster
85
(6.6)
340
(9.2)5-case cluster
41
(3.2)
205
(5.6)6-case cluster
22
(1.7)
132
(3.6)7-case cluster
11
(0.9)
77
(2.1)8-case cluster
11
(0.9)
88
(2.4)9-case cluster
8
(0.6)
72
(2.0)≥10 case cluster
27
(2.1)
408
(11.1)Show More1Clusters have two or more cases with matching spoligotype and 24-locus mycobacterial interspersed repetitive unit-variable number tandem repeat type (GENType) within a county during the specified 3-year time period.
2Cases with matching spoligotype and 24-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.
3Denominator is total number of clusters
4Denominator is total number of casesTable Printing Tips
							
					
							Last Reviewed:  October 21, 2021						Source: 	Division of Tuberculosis Elimination, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention
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