Abstract
As the results of the studies on the initial developmental forms and staining properties of acid-fast bacilli, especially of tubercle bacilli, the author found the following facts :
1) The findings obtaining herein the developmental forms of acid-fast bacilli, especially of tubercle bacilli, corresponded with those reported by many investigators.
2) The splitting, branching and budding forms in growth types of acid-fast bacilli were recogniged.
3) It seemed that there were not always clear parallel apprehensions between the staining property and the degree of acid-fastness of acid-fast bacilli.
4) The frequency of so-called non-aci.dfast type of acid-fast bacilli, especially of tubercle bacilli, was not only due to the degree of the acid-fast property of their strains, but to their developing stages, states, and circumstances.
