Construction of matrices for computer-assisted identification of aerobic Gram-positive cocci

Two identification matrices for use with computerized probabilistic identification were constructed, based on 327 reference strains and 212 field isolates of Gram-positive, aerobic coccoid bacteria. The first, MICR1, was constructed for catalase-positive strains (Micrococcaceae); the second, STPC1, for catalase-negative strains (streptococci). The quality of the resultant data was assessed using statistical analysis, and the value of the identification statistic used was considered in the light of possible alternatives.