CHAPTER XXVI 
THE HIGHER BACTERIA. THE YEASTS. 
THE MOLDS 
The Higher Bacteria 
The higher bacteria are of more complex structure 
than the ordinary bacteria and cause a number of dis¬ 
eases. 
I. Streptothrix 
The streptothrix causes an infection of skin and, oc¬ 
casionally, of other organs. It usually appears in 
stained preparations (with Loeffler’s alkaline methylene 
blue) as rods and branching thread-like filaments. 
Streptothrix can be cultivated on sterile fresh kidney 
tissue of rabbits. 
II. Actinomycosis 
Actinomycosis is the “lumpy jaw” of the cattle, and 
not infrequently seen in human beings, in whom it af¬ 
fects not only the jaw, but the skin, lungs and the intes¬ 
tinal tract as well. In pus the parasites appear as small 
granular bodies, grayish or yellowish. Microscopically 
they appear as rosette-like matter with the characteris¬ 
tic, club-shaped bodies. 
The Yeasts 
Of these, several cause disease in man, especially the 
so-called Saccharomyces hominis. Another yeast infec- 
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