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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*Comments to Author , Philip More*, Melanie Kemp*, and Timothy Brown*
Author affiliations: *Health Protection Agency, London, United Kingdom

Main Article

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.

Main Article

1Current affiliation: University of Malaya, Kuala Lumpur, Malaysia

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