Reported Tuberculosis in the United States, 2020
Table 58. Counts and Percentages of Tuberculosis Cases Estimated to be Attributed to Recent Transmission and Extensive Recent Transmission: Counties with >5 Percent Estimated Extensive Recent Transmission, 2019–2020
| Counties and County Equivalents1 | Total Genotyped Cases2 | Percentage of Genotyped Cases that are U.S.-born | Number of Unique GENTypes3 | Cases Attributed to Overall Recent Transmission4 | Cases Attributed to Extensive Recent Transmission5 | Percentage of Cases Attributed to Extensive Recent Transmission6 |
|---|---|---|---|---|---|---|
| Anne Arundel, MD | 14 | (21.4) | 14 | 1 | 1 | (7.1) |
| Baltimore (City), MD | 26 | (61.5) | 20 | 7 | 6 | (23.1) |
| Blue Earth, MN | 10 | (40.0) | 8 | 3 | 3 | (30.0) |
| Bronx, NY | 122 | (23.0) | 110 | 17 | 7 | (5.7) |
| Cumberland, ME | 16 | (37.5) | 14 | 2 | 1 | (6.3) |
| Dallas, TX | 197 | (43.1) | 166 | 43 | 21 | (10.7) |
| Dekalb, GA | 54 | (25.9) | 51 | 6 | 3 | (5.6) |
| Duval, FL | 58 | (58.6) | 41 | 21 | 13 | (22.4) |
| Escambia, FL | 22 | (81.8) | 12 | 12 | 9 | (40.9) |
| Fulton, GA | 51 | (52.9) | 46 | 10 | 5 | (9.8) |
| Harris, TX | 372 | (27.2) | 310 | 58 | 25 | (6.7) |
| Hidalgo, TX | 93 | (35.5) | 70 | 17 | 6 | (6.5) |
| Hillsborough, FL | 50 | (36.0) | 46 | 7 | 3 | (6.0) |
| Hinds, MS | 18 | (66.7) | 11 | 10 | 7 | (38.9) |
| Honolulu, HI | 111 | (9.9) | 88 | 23 | 15 | (13.5) |
| Imperial, CA | 57 | (43.9) | 39 | 17 | 8 | (14.0) |
| Jefferson, LA | 22 | (45.5) | 19 | 7 | 3 | (13.6) |
| Kent, DE | 10 | (80.0) | 4 | 5 | 2 | (20.0) |
| Kings, NY | 221 | (15.8) | 197 | 42 | 20 | (9.0) |
| Leon, FL | 12 | (75.0) | 8 | 5 | 1 | (8.3) |
| Los Angeles, CA | 792 | (15.0) | 653 | 135 | 63 | (8.0) |
| Marion, OR | 17 | (35.3) | 10 | 6 | 5 | (29.4) |
| Mecklenburg, NC | 52 | (34.6) | 41 | 8 | 6 | (11.5) |
| Nueces, TX | 15 | (66.7) | 13 | 3 | 2 | (13.3) |
| Orange, FL | 66 | (28.8) | 58 | 9 | 4 | (6.1) |
| Pinellas, FL | 29 | (41.4) | 26 | 6 | 2 | (6.9) |
| Pulaski, AR | 15 | (66.7) | 11 | 7 | 2 | (13.3) |
| Ramsey, MN | 48 | (10.4) | 41 | 9 | 7 | (14.6) |
| Richmond, NY | 31 | (22.6) | 31 | 4 | 2 | (6.5) |
| Robeson, NC | 20 | (90.0) | 8 | 13 | 11 | (55.0) |
| San Diego, CA | 342 | (28.4) | 268 | 76 | 38 | (11.1) |
| San Francisco, CA | 121 | (12.4) | 111 | 18 | 7 | (5.8) |
| San Joaquin, CA | 95 | (20.0) | 88 | 10 | 6 | (6.3) |
| San Mateo, CA | 94 | (5.3) | 84 | 17 | 10 | (10.6) |
| Shelby, TN | 46 | (54.3) | 32 | 16 | 6 | (13.0) |
| Southwest (Region), AK | 38 | (100.0) | 14 | 25 | 10 | (26.3) |
| Spokane, WA | 11 | (9.1) | 9 | 3 | 3 | (27.3) |
| St. Louis (City), MO | 15 | (66.7) | 12 | 4 | 2 | (13.3) |
| Travis, TX | 62 | (27.4) | 53 | 11 | 5 | (8.1) |
| Walker, TX | 55 | (90.9) | 21 | 39 | 35 | (63.6) |
| Washington, AR | 15 | (13.3) | 10 | 6 | 6 | (40.0) |
| Webb, TX | 38 | (52.6) | 31 | 10 | 3 | (7.9) |
1Counties (and county equivalents) that had >5% of cases attributed to extensive recent transmission are included.
2Total number of M. tuberculosis genotyped cases that are eligible to be evaluated for recent transmission (i.e., complete data for the plausible-source case method’s algorithm).
3Total number of unique GENTypes identified in the reporting area among all genotyped cases that are eligible to be evaluated for recent transmission.
4Number of cases attributed to overall recent transmission includes any given case with a plausible source case regardless of cluster size.
5Number of cases attributed to extensive recent transmission includes only cases in a plausible chain of transmission of six or more cases (five secondary and one source case).
6Percentage of cases attributed to extensive recent transmission calculated for counties with 10 or more genotyped cases.
