Volume 12, Number 5—May 2006
THEME ISSUE
Tuberculosis Special Section
Research
Mycobacterium tuberculosis and Rifampin Resistance, United Kingdom
I-Ching Sam*1, Francis Drobniewski*
, Philip More*, Melanie Kemp*, and Timothy Brown*
, Philip More*, Melanie Kemp*, and Timothy Brown*Table 3
Final culture identification results for all specimens*
| Result | Primary specimens, no. (%) | Isolates, no. (%) | Total, no. (%) |
|---|---|---|---|
| MTBC | |||
| Rifampin sensitive† | 892 (94.9) | 214 (90.9) | 1,106 (93.9) |
| Rifampin resistant only† | 9 (1.0) | 3 (1.3) | 12 (1.0) |
| MDRTB† | 37 (3.9) | 20 (8.4) | 57 (4.8) |
| Susceptibilities not determined† | 2 (0.2) | 1 (0.4) | 3 (0.3) |
| Total MTBC | 940 (47.1) | 238 (82.1) | 1,178 (51.5) |
| NTM | 181 (9.1) | 42 (14.5) | 223 (9.8) |
| Contaminated | 22 (1.1) | 8 (2.8) | 30‡ (1.3) |
| Culture not done | 5 (0.3) | 1 (0.3) | 6‡ (0.3) |
| No mycobacterial spp. | 849 (42.5) | 1 (0.3) | 850 (37.2) |
| Total | 1,997 | 290 | 2,287 |
*MTBC, Mycobacterium tuberculosis complex; MDRTB, multidrug-resistant tuberculosis; NTM, nontuberculous mycobacteria.
†Percentages of total MTBC cultures.
‡These 36 (1.6%) cases without definitive culture results were excluded from analyses of assay performance.
1Current affiliation: University of Malaya, Kuala Lumpur, Malaysia
