Vr. Garrido et al., STUDY OF CUT-OFF POINTS USING CHEMOLUMINISCENT PROBES TO IDENTIFY MYCOBACTERIA, Revista Clinica Espanola, 192(3), 1993, pp. 108-111
441 strain of mycobacteria were exposed to probes marked with luminous
material belonged to M. tuberculosis complex and M. avium complex. We
analyzed the following points: 1. If the cut off points obtained with
our strains were in accordance to those recommended by the manufactur
er, using two different luminometers. 2. If the correlation constant m
akes possible the convertion of the units form one luminometer to the
units obtained with the other one. 3. Data for sensibility, specificit
y and predictive positive and negative values using different cut off
points. Cut off points were differents in all cases except for the dat
a obtained with one luminometer using a probe belonged to M. tuberculo
sis complex. In this case the correlation constant could not be used.
In contrast, whiever the luminometer employed was, we found no signifi
ct differences between sensibility, specificity and predictive values.