About
Key Highlights
- During 2023–2024, 12% of U.S. TB cases were attributed to recent transmission.
- The percentage of cases attributed to recent transmission varied from 0%–62% across the 52 reporting areas.
- All but 5 reporting areas had at least one case attributed to recent transmission.
Data Table
Tuberculosis Cases and Percentages Estimated to be Attributed to Recent Transmission: Reporting Areas, 2023–2024
| Reporting area | Total cases1 | Cases attributed to recent transmission2 | Cases not attributed to recent transmission | ||
|---|---|---|---|---|---|
| No. | (%) | No. | (%) | ||
| United States | 14,648 | 1,804 | (12.3) | 12,844 | (87.7) |
| Alabama | 141 | 41 | (29.1) | 100 | (70.9) |
| Alaska | 112 | 69 | (61.6) | 43 | (38.4) |
| Arizona | 328 | 31 | (9.5) | 297 | (90.5) |
| Arkansas | 91 | 22 | (24.2) | 69 | (75.8) |
| California | 3,206 | 305 | (9.5) | 2,901 | (90.5) |
| Colorado | 121 | 7 | (5.8) | 114 | (94.2) |
| Connecticut | 120 | 7 | (5.8) | 113 | (94.2) |
| Delaware | 32 | 10 | (31.2) | 22 | (68.8) |
| District of Columbia | 42 | 4 | (9.5) | 38 | (90.5) |
| Florida | 956 | 103 | (10.8) | 853 | (89.2) |
| Georgia | 384 | 68 | (17.7) | 316 | (82.3) |
| Hawaii | 187 | 4 | (2.1) | 183 | (97.9) |
| Idaho | 34 | 1 | (2.9) | 33 | (97.1) |
| Illinois | 474 | 42 | (8.9) | 432 | (91.1) |
| Indiana | 174 | 13 | (7.5) | 161 | (92.5) |
| Iowa | 69 | 7 | (10.1) | 62 | (89.9) |
| Kansas | 74 | 20 | (27.0) | 54 | (73.0) |
| Kentucky | 129 | 18 | (14.0) | 111 | (86.0) |
| Louisiana | 148 | 33 | (22.3) | 115 | (77.7) |
| Maine | 31 | 2 | (6.5) | 29 | (93.5) |
| Maryland | 291 | 36 | (12.4) | 255 | (87.6) |
| Massachusetts | 353 | 39 | (11.0) | 314 | (89.0) |
| Michigan | 199 | 17 | (8.5) | 182 | (91.5) |
| Minnesota | 256 | 23 | (9.0) | 233 | (91.0) |
| Mississippi | 61 | 12 | (19.7) | 49 | (80.3) |
| Missouri | 116 | 14 | (12.1) | 102 | (87.9) |
| Montana | 0 | 0 | … | 0 | … |
| Nebraska | 57 | 10 | (17.5) | 47 | (82.5) |
| Nevada | 135 | 4 | (3.0) | 131 | (97.0) |
| New Hampshire | 22 | 0 | (0.0) | 22 | (100.0) |
| New Jersey | 536 | 57 | (10.6) | 479 | (89.4) |
| New Mexico | 53 | 2 | (3.8) | 51 | (96.2) |
| New York State3 | 340 | 21 | (6.2) | 319 | (93.8) |
| New York City | 1,177 | 131 | (11.1) | 1,046 | (88.9) |
| North Carolina | 400 | 72 | (18.0) | 328 | (82.0) |
| North Dakota | 16 | 0 | (0.0) | 16 | (100.0) |
| Ohio | 234 | 21 | (9.0) | 213 | (91.0) |
| Oklahoma | 82 | 19 | (23.2) | 63 | (76.8) |
| Oregon | 119 | 10 | (8.4) | 109 | (91.6) |
| Pennsylvania | 333 | 24 | (7.2) | 309 | (92.8) |
| Rhode Island | 32 | 2 | (6.2) | 30 | (93.8) |
| South Carolina | 124 | 18 | (14.5) | 106 | (85.5) |
| South Dakota | 23 | 2 | (8.7) | 21 | (91.3) |
| Tennessee | 189 | 31 | (16.4) | 158 | (83.6) |
| Texas | 1,777 | 348 | (19.6) | 1,429 | (80.4) |
| Utah | 70 | 4 | (5.7) | 66 | (94.3) |
| Vermont | 7 | 0 | (0.0) | 7 | (100.0) |
| Virginia | 334 | 21 | (6.3) | 313 | (93.7) |
| Washington | 335 | 47 | (14.0) | 288 | (86.0) |
| West Virginia | 13 | 1 | (7.7) | 12 | (92.3) |
| Wisconsin | 105 | 11 | (10.5) | 94 | (89.5) |
| Wyoming | 6 | 0 | (0.0) | 6 | (100.0) |
1Total number of M. tuberculosis genotyped cases eligible to be evaluated for recent transmission (i.e., complete data for the plausible-source case method algorithm).
2A case is attributed to recent transmission if a plausible source case can be identified in a person who had an M. tuberculosis isolate with the same wgMLSType that differed by ≤5 single nucleotide polymorphisms, had an infectious form of TB, was 10 years of age or older, resided within 100 miles of the case, and was diagnosed within 2 years before the case.
3Excludes New York City.
Notes
Data for all years are updated through July 10, 2025.
Ellipses (...) indicate that the percentage cannot be calculated, and the denominator is 0.