In the resistance test on cycloserine (CS), the suitable pH of the condense water of 1%Ogawa egg media and of the basal medium of Kirchner semi-liquid agar media is 6.8, as it was already researched by us. In order to determine the suitable pH region for resistance media to CS, five pH grades (6.4-7.4) were adopted with 6.8 at the center, and the influence of media on the growth of M. tuberculosis was observed.
Physiological characters of Mycobacterium avium are described based on data of fourteen strains. Colonial morphology: Smooth, wet, white colonies on egg media and on Sauton agar. Nonphotochromogenic.
This paper relates a case of pulmonary infection whose sputum first had been positive for human tubercle bacilli and then, about three and half years after the negative conversion, became positive for only so-called unclassified mycobacteria.