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Reported Tuberculosis in the United States, 2020						Print
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Table 24. Characteristics of Tuberculosis Cases in GENType Clusters,1 by Alert Levels Based on Log-Likelihood Ratios (LLR):2 United States, 2018–2020
See Surveillance Slide #69.
Table 24. Characteristics of Tuberculosis Cases in GENType Clusters, by Alert Levels Based on Log-Likelihood Ratios (LLR): United States, 2017-2019
Case Characteristics
Unique
Clustered
Alert Levels for Clustered Cases3Non-alerted (LLR <5)
Medium (LLR 5–<10)
High (LLR ≥10)No.
(%)
No.
(%)
No.
(%)
No.
(%)
No.
(%)**Total**
**15,746**
**(81.0)**
**3,687**
**(19.0)**
**2,266**
**(61.5)**
**883**
**(23.9)**
**538**
**(14.6)****Origin of Birth**U.S.-born
3,552
(66.4)
1,799
(33.6)
782
(43.5)
584
(32.5)
433
(24.1)Non-U.S.–born
12,169
(86.6)
1,883
(13.4)
1,480
(78.6)
298
(15.8)
105
(5.6)Unknown or Missing
25
(83.3)
5
(16.7)
4
(80.0)
1
(20.0)
0
(0.0)**Race and Ethnicity**Hispanic or Latino
4,485
(78.5)
1,230
(21.5)
825
(67.1)
303
(24.6)
102
(8.3)American Indian/Alaska Native
97
(46.6)
111
(53.4)
11
(9.9)
35
(31.5)
65
(58.6)Asian
6,335
(88.4)
832
(11.6)
741
(89.1)
69
(8.3)
22
(2.6)Black or African American
2,717
(73.9)
958
(26.1)
409
(42.7)
324
(33.8)
225
(23.5)Native Hawaiian/Other Pacific Islander
118
(48.6)
125
(51.4)
70
(56.0)
19
(15.2)
36
(28.8)White
1,824
(82.3)
392
(17.7)
192
(49.0)
120
(30.6)
80
(20.4)Multiple Race
111
(79.9)
28
(20.1)
10
(35.7)
10
(35.7)
8
(28.6)Unknown or Missing
59
(84.3)
11
(15.7)
8
(72.7)
3
(27.3)
0
(0.0)**Age Group (Years)**0–4
67
(36.8)
115
(63.2)
61
(53.0)
37
(32.2)
17
(14.8)5–14
123
(60.9)
79
(39.1)
39
(49.4)
19
(24.1)
21
(26.6)15–24
1,469
(76.8)
443
(23.2)
268
(60.5)
121
(27.3)
54
(12.2)25–44
4,691
(80.7)
1,120
(19.3)
657
(58.7)
271
(24.2)
192
(17.1)45–64
4,557
(78.7)
1,232
(21.3)
728
(59.1)
314
(25.5)
190
(15.4)≥65
4,838
(87.4)
698
(12.6)
513
(73.5)
121
(17.3)
64
(9.2)Unknown
1
(100.0)
0
(0.0)**Disease Site**Pulmonary Only
11,070
(79.6)
2,845
(20.4)
1,723
(60.6)
703
(24.7)
419
(14.7)Extrapulmonary
2,665
(86.8)
405
(13.2)
270
(66.7)
84
(20.7)
51
(12.6)Both
1,996
(82.0)
437
(18.0)
273
(62.5)
96
(22.0)
68
(15.6)Unknown
15
(100.0)
0
(0.0)**Sputum Smear**Positive
7,331
(78.8)
1,972
(21.2)
1,191
(60.4)
485
(24.6)
296
(15.0)Negative
6,585
(83.3)
1,318
(16.7)
852
(64.6)
302
(22.9)
164
(12.4)Not Done
1,804
(82.1)
392
(17.9)
222
(56.6)
92
(23.5)
78
(19.9)Unknown or Missing
26
(83.9)
5
(16.1)
1
(20.0)
4
(80.0)
0
(0.0)**Cavitary Disease4**Yes
172
(78.5)
47
(21.5)
29
(61.7)
10
(21.3)
8
(17.0)No
1,344
(80.7)
321
(19.3)
204
(63.6)
67
(20.9)
50
(15.6)Unknown or Missing
16
(80.0)
4
(20.0)
1
(25.0)
2
(50.0)
1
(25.0)**Homeless Within the Past Year**Yes
527
(61.8)
326
(38.2)
153
(46.9)
89
(27.3)
84
(25.8)No
15,039
(81.9)
3,313
(18.1)
2,094
(63.2)
786
(23.7)
433
(13.1)Unknown or Missing
180
(78.9)
48
(21.1)
19
(39.6)
8
(16.7)
21
(43.8)**Excess Alcohol Use Within the Past Year**Yes
1,218
(69.0)
548
(31.0)
263
(48.0)
149
(27.2)
136
(24.8)No
14,262
(82.4)
3,047
(17.6)
1,958
(64.3)
712
(23.4)
377
(12.4)Unknown or Missing
266
(74.3)
92
(25.7)
45
(48.9)
22
(23.9)
25
(27.2)**Injection Drug Use Within the Past Year**Yes
139
(59.1)
96
(40.9)
49
(51.0)
23
(24.0)
24
(25.0)No
15,336
(81.4)
3,506
(18.6)
2,174
(62.0)
838
(23.9)
494
(14.1)Unknown or Missing
271
(76.1)
85
(23.9)
43
(50.6)
22
(25.9)
20
(23.5)**Non-Injection Drug Use Within the Past Year**Yes
839
(60.0)
560
(40.0)
253
(45.2)
164
(29.3)
143
(25.5)No
14,646
(82.8)
3,046
(17.2)
1,973
(64.8)
696
(22.8)
377
(12.4)Unknown or Missing
261
(76.3)
81
(23.7)
40
(49.4)
23
(28.4)
18
(22.2)**Resident of a Correctional Facility at the Time of Diagnosis**Yes
365
(71.9)
143
(28.1)
63
(44.1)
28
(19.6)
52
(36.4)No
15,291
(81.3)
3,519
(18.7)
2,189
(62.2)
848
(24.1)
482
(13.7)Unknown or Missing
90
(78.3)
25
(21.7)
14
(56.0)
7
(28.0)
4
(16.0)**HIV Status**Positive
675
(78.8)
182
(21.2)
94
(51.6)
43
(23.6)
45
(24.7)Negative
13,319
(80.6)
3,213
(19.4)
1,976
(61.5)
775
(24.1)
462
(14.4)Refused
345
(86.3)
55
(13.8)
34
(61.8)
17
(30.9)
4
(7.3)Not Offered
988
(83.8)
191
(16.2)
131
(68.6)
39
(20.4)
21
(11.0)Unknown, Missing, or Indeterminate
419
(90.1)
46
(9.9)
31
(67.4)
9
(19.6)
6
(13.0)**Multidrug-Resistant TB**Yes
199
(80.9)
47
(19.1)
37
(78.7)
0
(0.0)
10
(21.3)No
14,957
(80.8)
3,548
(19.2)
2,174
(61.3)
861
(24.3)
513
(14.5)Unknown or Missing
590
(86.5)
92
(13.5)
55
(59.8)
22
(23.9)
15
(16.3)Show More
Show More1GENType clusters have two or more cases with matching spoligotype and 24-locus mycobacterial interspersed repetitive unit-variable number tandem repeat type within a county during the specified 3-year time period.2Alert levels are based on a log-likelihood ratio (LLR), which calculates the geographical concentration of a genotype in a county compared to the rest of the country during a 3-year period.3There were 3,687 cases in 1,280 clusters: 538 cases were in 61 (4.8%) high alert clusters; 883 cases were in 297 (23.2%) medium alert clusters, and 2,266 cases were in 922 (72.0%) non-alert clusters.4Cavitary disease is only assessed for persons with pulmonary TB and an abnormal x-ray.Table Printing Tips
							
					
							Last Reviewed:  October 25, 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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