Abstract
Thirteen strains of mycobacteria isolated from human and suspected as unclassified mycobatceria and ten strains of mycobacteria isolated from dogs were examined for their tuberculin-specificity.
According to the tuberculin-specificity studies, eight suspicious nonchromogens, four isolated from human and four from dogs, were identified as nonchromogens. The tuberculin-specificity of six scotochromogens isolated from human did not show uniformity. Eight suspicious human type strains, two isolated from human and the remaining six from dogs, were confirmed as human type by their tuberculin-specificity. The Yamamoto S strain, which was classified into the "rapid growers" showed independent tuberculin-specificity. The similarity of tuberculin-specificity between photochromogens and M. fortuitum was demonstrated.
