Aj. Morris et Lb. Reller, RELIABILITY OF CORD FORMATION IN BACTEC MEDIA FOR PRESUMPTIVE IDENTIFICATION OF MYCOBACTERIA, Journal of clinical microbiology, 31(9), 1993, pp. 2533-2534
We evaluated cord formation in BACTEC media as a criterion for presump
tive identification of Mycobacterium tuberculosis complex. Auramine-rh
odamine smears from 673 radiometrically positive BACTEC vials were exa
mined. The presence of cording had a sensitivity, a specificity, and p
ositive and negative predictive values of 22.9, 98.5, 82.9, and 80.3%,
respectively. Before cord formation is used to report presumptive ide
ntification of M. tuberculosis complex, workers should determine the r
eliability of this finding in their own laboratories.