126 CLINICAL BACTERIOLOGY. 



tal-wards and dissecting rooms, from the mouth, the nose, 

 the pharynx, and the skin ; further, from the intestine, 

 and though seldom from the vagina of healthy women. 



The diplococcus pneumonias Frankel is an exceed- 

 ingly frequent inhabitant of the buccal and nasal cavities, 

 and especially of the entire upper portion of the respira- 

 tory apparatus ; at times it is present in the intestine. 



The diplobacillus Friedlander is found normally in the 

 same situations as the diplococcus Frankel,' although its 

 occurrence is much more seldom. 



The bacillus pyocyaneus has been found upon the 

 skin, especially in the axillary cavity ; further, in the 

 external auditory canal and in intestinal mucus ; it is not 

 rarely encountered also in the air and in water. 



The bacterium coli commune and bacterium lactis 

 aerogenes are found throughout the entire digestive tract, 

 especially in the intestine (the aerogenes more commonly in 

 the feces of infants) ; further, in the vulva and the vagina 

 and on the prepuce, upon the skin, in the air, in water, and 

 in milk. 



The common causative agents of inflammation and 

 suppuration are thus found in healthy persons in the main 

 upon the skin and the so-called open cavities of the body, 

 the pyogenic cocci more commonly upon the surface of the 

 skin and in the upper portion of % the digestive and respira- 

 tory tracts, and the pyogenic bacterium coli more com- 

 monly in the intestine. It is, therefore, to be anticipated 

 that the inflammatory and suppurative processes that take 

 place upon the skin and in the neighborhood of the buccal, 

 nasal, and pharyngeal cavities are excited especially by 

 cocci, while those of the intestinal tract and of the genito- 

 urinary tract and their entire neighborhood are due more 

 commonly to the bacterium coli or the bacterium lactis 



THE OCCURRENCE OF THE CAUSATIVE AGENTS OF 

 INFLAMMATION IN DISEASE. 



CUTANEOUS SUPPURATION. 



Furuncle and carbuncle are almost always attended 

 with the presence of staphylococci (staphylococcus aureus 

 and albus). That staphylococci are, in fact, the cause of 



