SECTION III. 



HIGHER BACTERIA, MOLDS, YEASTS, FILTERABLE 

 VIRUSES, DISEASES OF UNKNOWN ETIOLOGY. 



CHAPTER XXVIII. 



TRICHOMYCETES, ACTINOMYCETES, HYPHOMYCETES, 

 SACCHAROMYCETES. 



THE PATHOGENIC HIGHER BACTERIA. 

 Trichomy cetes . 

 Leptothrix. 

 Cladothrix. 

 Nocardia (Strep tothrix). 



Actinomyces Bo vis. 



Mycetoma (Madura Foot). 

 HYPHOMYCETES. 



Eumycetes or Molds. 

 SACCHAROMYCETES. 



THE PATHOGENIC HIGHER BACTERIA. 



Trichomycetes. The Trichomy cetes occupy a position intermediate 

 between the true bacteria (Schizomycetes) and the molds (Hypho- 

 my cetes), in the system of classification. Their method of reproduc- 

 tion is more complex than that of the bacteria, but their cycle of 

 development is simpler than that of the molds. The organisms 

 usually grouped in the Trichomycetes are heterogeneous in their 

 characteristics and there is a decided lack of agreement concerning 

 the limitation of the several subdivisions of these microorganisms. 

 Foulerton 1 places all the members of the higher bacteria in one genus, 

 Streptothrix, including the older genera, Leptothrix, Cladothrix, 

 Streptothrix and Actinomyces. Wright 2 and others have not sub- 

 scribed to this view and their evidence is impressive. Additional 

 investigations are required before final judgment can be made. 3 For the 

 present the older grouping of the Trichomycetes, Leptothrix, Clado- 

 thrix, Nocardia (Streptothrix), and Actinomyces will be adhered to. 



1 Allbutt and Rolleston, System of Medicine, 1906, ii, Part I, 302; British Med. 

 Jour., 1912, i, 300. 



2 Jour. Med. Research, 1905, xiii, 349. 



3 See Musgrave, Clegg, and Polk, Philippine Jour, of Sci., 1908, iii, 447, for very full 

 bibliography and discussion. 



