APPENDIX. 



BRIEF DESCRIPTIONS OF A FEW REPRESENTATIVE 



PATHOGENIC MICRO-ORGANISMS WHICH 



ARE NOT BACTERIA. 



CHAPTER XXX VI T. 



THE STREPTOTHKIX GROUP FAVU8 AND RINGWORM 

 FUNGI. 



THE varieties of the streptothrix group have as yet 

 not beeu clearly described. Some at least are patho- 

 genic. This group of micro-organisms while having 

 many affinities with the bacteria, yet differs from them 

 in many important respects which link them with the 

 fungi. They develop from spore-like bodies into 

 cylindrical dichotomously branching threads which 

 grow into colonies, the appearance of which suggests a 

 mass of radiating filaments. Under favorable condi- 

 tions certain of the threads become fruit-hypse, and 

 these break up into chains of round spore-like bodies, 

 which do not, however, have the same staining reac- 

 tions nor resisting powers as true spores. The tubercle 

 grass and diphtheria bacilli are by some believed to 

 properly belong in the streptothrix group on account 

 of the true branching forms developed by them under 

 certain conditions. The best known of the strepto- 

 thrix group is the actinomyces fungus. 



