208 BACTERIA 



It stains well in tissues and cultures by Gram's method, and by 

 the ordinary basic stains. It may be cultivated on bouillon, blood 

 serum, agar, potato, etc., and it is rather indifferent to the reaction 

 of the media. It grows best if sugars are present. It is, however, 

 very susceptible to such antiseptics as phenol, salicylic acid, sub- 

 limate, etc. 



FIG. 74. Thrush fungus. (Kolle and Wassermann.) 



Pathogenesis. Causes in man a condition known as oidio- 

 mycosis, and in young children a very troublesome stomatitis, which, 

 if the child is weak and illy nourished, may result seriously. It may 

 cause metastatic abscesses in the brain, spleen, and kidneys, or 

 nodules in the lungs. This organism may penetrate mucous tissues, 

 and fill the lumen of vessels (Virchow). By repeated injections of 

 cultures into rabbits anti-oidium serum may be prepared. This 

 serum exercises a bacteriolytic and an agglutinative action on the 

 oidium which normal serum does not have. 



Oidium Coccidioides, Ophiils. Saccharomyces Busse. (Blas- 

 tomycetes). In and near Chicago there have appeared parasitic 

 inflammations of the skin that have been termed blastomycetic 

 dermatitis. From the lesions of this disease fungi have been 



