非定型抗酸菌Group 4 rapid growersに関する研究 Mycobacterium fortuitumとMycobacterium abscessusとの鑑別について

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An Adansonian classification was presented for sixteen strains of Mycobacterium fortuitum and fourteen strains of M. abscessus of Runyon's Group IV.It was based on 65 characters determined by 24 tests.The S-values among the strains of M. fortuitum were 82 to 100 per cent, with the average of 93 per cent, and those among the strains of M. abscessus 85 to 100 per cent, with the average of 95 per cent.M. abscessus appeared to be a distinct species, exhibiting S-values ranging from 49 to 71 per cent, or 57 per cent on an average, when compared with M. fortuitum.It was easy to distinguish M. abscessus from M. fortuitum on the basis of acid production from fructose, utilization of sodium citrate, nitrate reductase, allantoinase, nicotinamidase, phosphatase stable against heating at 70°C, PABA degradation, growth at 42°C, iron uptake, 5 per cent NaCl tolerance, susceptibility to 0.15M sodium nitrite, and bluing or greening of water blue.
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