Table 2.
Number of Mycobacterium tuberculosis isolates in San Diego County from 2005 through 2008, with singleton and clustered genotypesb, stratified by strain lineage.
|
Mtb lineage |
All cases N (%) |
Singleton cases N (%) |
Clustered Cases N (%) |
X2 | p |
|---|---|---|---|---|---|
| Total | 832 (100.0) |
352 (100.0) | 480 (100.0) | ||
| EAI | 257 (30.9) | 97 (27.6) | 160 (33.3) | 1.51 | 0.2199 |
| LAM | 141 (16.9) | 73 (20.7) | 68 (14.2) | 4.01 | 0.0451 |
| Haarlem | 126 (15.1) | 58 (16.5) | 68 (14.2) | 0.48 | 0.4897 |
| Beijing | 79 (9.5) | 21 (6.0) | 58 (12.1) | 6.74 | 0.0094 |
| S | 58 (7.0) | 13 (3.7) | 45 (9.4) | 8.07 | 0.0045 |
| UgandaI | 55 (6.6) | 18 (5.1) | 37 (7.7) | 1.57 | 0.2097 |
| X | 55 (6.6) | 37 (10.5) | 18 (3.8) | 12.06 | 0.0005 |
| Dehli/CAS | 28 (3.4) | 19 (5.4) | 9 (1.9) | 6.20 | 0.0127 |
| TUR | 10 (1.2) | 2 (0.6) | 8 (1.7) | 0.2054a | |
| UgandaII | 8 (1.0) | 3 (0.9) | 5 (1.0) | 1.000a | |
| Cameroon | 6 (0.7) | 6 (1.7) | 0 (0.0) | n/a | n/a |
| Ghana | 5 (0.6) | 3 (0.9) | 2 (0.4) | 0.6555a | |
| NEW-1 | 4 (0.5) | 2 (0.6) | 2 (0.4) | 1.000a |
n/a = no statistical test done due to zero value cells in row.
a
Fisher exact test used.
b
Genotypes were defined by spoligotype and mycobacterial interspersed repetitive units (MIRU) typing.