RT Journal Article SR Electronic(1) A1 Wayne, L. G. A1 Engel, H. W. B. A1 Grassi, C. A1 Gross, W. A1 Hawkins, J. A1 Jenkins, P. A. A1 Käppler, W. A1 Kleeberg, H. H. A1 Krasnow, I. A1 Nel, E. E. A1 Pattyn, S. R. A1 Richards, P. A. A1 Showalter, S. A1 Slosarek, M. A1 Szabo, I. A1 Tarnok, I. A1 Tsukamura, M. A1 Vergmann, B. A1 Wolinsky, E.YR 1976 T1 Highly Reproducible Techniques for Use in Systematic Bacteriology in the Genus Mycobacterium: Tests for Niacin and Catalase and for Resistance to Isoniazid, Thiophene 2-Carboxylic Acid Hydrazide, Hydroxylamine, and p-Nitrobenzoate JF International Journal of Systematic and Evolutionary Microbiology, VO 26 IS 3 SP 311 OP 318 DO https://doi.org/10.1099/00207713-26-3-311 PB Microbiology Society, SN 1466-5034, AB Abstract This is a report of the second cooperative study, conducted by the International Working Group on Mycobacterial Taxonomy, to standardize and establish reproducibility of tests for classifying and identifying mycobacteria. Five tests that met specified rigorous criteria have already been described (Wayne et al., 1974). In the present report, six additional tests are described which meet these criteria. They are tests for production of niacin and of catalase and for resistance to 10 μg of isonicotinic acid hydrazide (isoniazid) per ml, 1 μg of thiophene 2-carboxylic acid hydrazide per ml, 250 μg of hydroxylamine hydrochloride per ml, and 500 μg of p-nitrobenzoate per ml., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-26-3-311