Table 1.
Number of Mycobacterium tuberculosis isolates in San Diego County with singleton and clustered genotypesa by year of diagnosis.
| Year | All cases (% all years) |
Singleton cases (% patients) |
Clustered cases (% patients) |
|---|---|---|---|
| 2005–2008 | 832 (100) | 352 (42.3) | 480 (57.7) |
| 2005 | 203 (23.4) | 93 (45.8) | 110 (54.2) |
| 2006 | 215 (25.8) | 102 (47.4) | 113 (52.6) |
| 2007 | 216 (26.0) | 75 (34.7) | 141 (65.3) |
| 2008 | 198 (23.8) | 82 (41.4) | 116 (58.6) |
a
Genotypes defined spoligotype and mycobacterial interspersed repetitive units (MIRU) typing.