Abstract
1) All samples of P. O. E. Sorbitan laurate (yucicogen 200) inhibited the growth of tubercle bacilli when added to Kirchner's media in concentrations of 0.1 percent or more.
2) P. O. E. Sorbitan stearate (yucicogen 600) favored diffuse growth of tubercle bacilli in Kirchner's media.
3) The other samples (yucicogen 800, yucicogen 60 yucicogen 610) had no ability to disperse cultures of tubercle bacilli.
4) Enhancement of growth of tubercle bacilli was obtained when added to the media in concentration of 0.001 percent.
5) Cultures growing diffusely in media consisted of cells of classical morphology and staining properties which again exhibited the usual made of growth when returned to the standard media.
