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. 2010 Oct 6;65(12):2574–2581. doi: 10.1093/jac/dkq366

Figure 2.

Figure 2.

The QAC-resistant phenotype reverts to normal when passaged on medium without disinfectants. An original clinical M. abscessus isolate—M. absc. WT 2.0 (LTE3514), as well as its resistant derivatives and revertants, were plated after 20 or 60 min exposures to 9% CTAB. Survival is expressed as the number of colonies appearing after the CTAB exposures, compared with the number of colonies appearing after a parallel, control treatment without the presence of CTAB. The derivatives of clinical isolate WT 2.0 were selected as survivors after exposures to CTAB (2.1), DBLAB (2.2) or glutaraldehyde (2.3). The revertants were obtained after either three (2.1.3, 2.2.3 and 2.3.3) or six (2.1.6, 2.2.6 and 2.3.6) serial passages on solid medium without disinfectants.