Reported Tuberculosis in the United States, 2018

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Table 59. Characteristics of Tuberculosis Cases Estimated to be Attributed to Recent Transmission and Extensive Recent Transmission: United States, 2017-2018

See Surveillance Slides #42, #43 and #44

Table 59. Characteristics of Tuberculosis Cases Estimated to be Attributed to Recent Transmission and Extensive Recent Transmission: United States, 2017-2018
Case Characteristics Total Genotyped Cases1 Cases Not Attributed to Recent Transmission Cases Attributed to Recent Transmission2 Cases Attributed to Extensive Recent Transmission3
No. (%) No. (%) No. (%)
Total 13,601 11,889 (87.4) 1,712 (12.6) 589 (4.3)
Origin of Birth
U.S-born 3,854 2,885 (74.9) 969 (25.1) 376 (9.8)
Non-U.S.–born 9,726 8,987 (92.4) 739 (7.6) 212 (2.2)
Unknown or Missing 21 17 (81.0) 4 (19.0) 1 (4.8)
Race and Ethnicity
Hispanic/Latino 3,739 3,270 (87.5) 469 (12.5) 129 (3.5)
American Indian/Alaska Native 166 99 (59.6) 67 (40.4) 40 (24.1)
Asian 5,076 4,714 (92.9) 362 (7.1) 122 (2.4)
Black or African American 2,726 2,176 (79.8) 550 (20.2) 223 (8.2)
Native Hawaiian/Other Pacific Islander 155 118 (76.1) 37 (23.9) 11 (7.1)
White 1,597 1,391 (87.1) 206 (12.9) 59 (3.7)
Multiple Race 87 73 (83.9) 14 (16.1) 4 (4.6)
Unknown or Missing 55 48 (87.3) 7 (12.7) 1 (1.8)
Age Group (Years)
0–4 122 74 (60.7) 48 (39.3) 9 (7.4)
5–14 143 96 (67.1) 47 (32.9) 15 (10.5)
15–24 1,282 1,107 (86.3) 175 (13.7) 48 (3.7)
25–44 4,167 3,624 (87.0) 543 (13.0) 186 (4.5)
45–64 4,073 3,480 (85.4) 593 (14.6) 223 (5.5)
≥65 3,812 3,506 (92.0) 306 (8.0) 108 (2.8)
Unknown 2 2 (100.0) 0 (0.0) 0 (0.0)
Disease Site
Pulmonary Only 9,884 8,524 (86.2) 1,360 (13.8) 473 (4.8)
Extrapulmonary 2,096 1,928 (92.0) 168 (8.0) 58 (2.8)
Both 1,588 1,409 (88.7) 179 (11.3) 57 (3.6)
Unknown 33 28 (84.8) 5 (15.2) 1 (3.0)
Sputum Smear
Positive 6,387 5,508 (86.2) 879 (13.8) 316 (4.9)
Negative 5,563 4,922 (88.5) 641 (11.5) 219 (3.9)
Not Done 1,632 1,441 (88.3) 191 (11.7) 54 (3.3)
Unknown or Missing 19 18 (94.7) 1 (5.3) 0 (0.0)
Cavitary Disease4
Yes 152 132 (86.8) 20 (13.2) 4 (2.6)
No 1,082 957 (88.4) 125 (11.6) 42 (3.9)
Unknown or Missing 4 4 (100.0) 0 (0.0) 0 (0.0)
Homeless Within Past Year
Yes 628 437 (69.6) 191 (30.4) 92 (14.6)
No 12,815 11,316 (88.3) 1,499 (11.7) 488 (3.8)
Unknown or Missing 158 136 (86.1) 22 (13.9) 9 (5.7)
Excess Alcohol Use Within the Past Year
Yes 1,299 999 (76.9) 300 (23.1) 112 (8.6)
No 11,987 10,625 (88.6) 1,362 (11.4) 456 (3.8)
Unknown or Missing 315 265 (84.1) 50 (15.9) 21 (6.7)
Injecting Illicit Drug Use Within Past Year
Yes 166 132 (79.5) 34 (20.5) 10 (6.0)
No 13,137 11,509 (87.6) 1,628 (12.4) 559 (4.3)
Unknown or Missing 298 248 (83.2) 50 (16.8) 20 (6.7)
Noninjecting Illicit Drug Use Within Past Year
Yes 979 689 (70.4) 290 (29.6) 129 (13.2)
No 12,341 10,960 (88.8) 1,381 (11.2) 444 (3.6)
Unknown or Missing 281 240 (85.4) 41 (14.6) 16 (5.7)
Resident of a Correctional Facility at the Time of Diagnosis
Yes 411 346 (84.2) 65 (15.8) 26 (6.3)
No 13,097 11,466 (87.5) 1,631 (12.5) 560 (4.3)
Unknown or Missing 93 77 (82.8) 16 (17.2) 3 (3.2)
HIV Status
Positive 638 529 (82.9) 109 (17.1) 43 (6.7)
Negative 11,359 9,937 (87.5) 1,422 (12.5) 489 (4.3)
Refused 291 251 (86.3) 40 (13.7) 11 (3.8)
Not Offered 851 752 (88.4) 99 (11.6) 37 (4.3)
Unknown, Missing or Indeterminate 462 420 (90.9) 42 (9.1) 9 (1.9)
Multidrug-Resistant TB
Yes 222 191 (86.0) 31 (14.0) 13 (5.9)
No 12,383 10,859 (87.7) 1,524 (12.3) 513 (4.1)
Unknown or Missing 996 839 (84.2) 157 (15.8) 63 (6.3)

1 Total number of Mycobacterium tuberculosis genotyped cases that are eligible to be evaluated for recent transmission (i.e., complete data for the plausible source-case method’s algorithm).
2 Number of cases attributed to recent transmission includes any given case with a plausible source case, regardless of cluster size.
3 Number of cases attributed to extensive recent transmission includes only cases in a plausible chain of transmission of ≥6 cases (≥5 secondary and one source case).
4 Cavitary disease only assessed for persons with pulmonary TB and an abnormal chest radiograph.

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