[Activity of quaternary ammonium derivatives against 145 strains of rapidly-growing atypical mycobacteria].

A survey about 145 atypical mycobacteria strains belonging to the M. fortuitum y M. chelonae complex sensitivity in response to three quaternary ammonium derivates has been performed by means of the dilutional and agar spreading methods. High strain sensitivity has been detected, having the three investigated antiseptics a very similar behaviour. The correlation rates and the regression lines equations have been obtained. And as a result of the high values we have obtained, it's possible to get the strain CMI directly from the corresponding inhibition halo.