A Study of the Neutral Red Test for the Determination of the Virulence of Mycobacteria

摘要

Two hundred fifty-three acid-fast strains f mycobacterium were tested for virulence by inoculating guinea pigs and comparing the re-alts with those obtained in the neutral red test in 80.9 percent of the strains tested, test results showed agreement. In 19.0 percent of he strains tested the results were not in agreement. Some of the factors which may have influenced the results are discussed.