232 ESSENTIALS OF BACTERIOLOGY 



and digestion can proceed in a perfectly sterile condition. 

 Food and air sterilized will not develop bacteria in the feces. 



In the feces of the young a great many bacteria have been 

 found that are supposed to stand in close relation with the 

 intestinal disorders common to nurslings. The majority of 

 bacteria usually present in the intestines are non-pathogenic. 

 The following varieties may be met with in the feces: Micro- 

 coccus aerogenes, Bacillus subtilis, Bacillus butyricus, Bacillus 

 putrificus coli, Bacillus lactis aerogenes, Bacillus coli commune, 

 Bacillus subtiliformis, and the bacteria of cholera, dysentery, 

 and typhoid, besides many yeast-cells. 



Genito -urinary Passages. In vaginal secretion Bumm 

 has been able to find a number of organisms, some of which 

 closely resemble the gonococcus; thus, there is the Diplococcus 

 subflavus, Micrococcus lacteus faviformis, Diplococcus albicans 

 amplus, and the vaginal bacillus. 



In the urethra of healthy persons bacteria are sometimes 

 found, usually having entered from the air. 



In the normal secretions around the prepuce a bacillus called 

 the smegma bacillus has been discovered, and it is considered 

 identical with the so-called syphilis bacillus of Lustgarten. 



In urethral pus a number of diplococci other than the gono- 

 cocci have been isolated. 



From the urine itself a great number of bacteria have been 

 obtained, but mostly derived from the air, finding in the urine 

 a suitable soil. 



Microorganisms of the Blood. Many of the bacteria 

 described in the body of this book are found in the blood of the 

 animal they infect; thus, anthrax bacilli are always found 

 in the blood, but tubercle bacilli seldom, if ever, enter this 

 secretion. 



When animals are subcutaneously injected with pneumo- 

 cocci they are found in large quantities in the blood. The 

 diseases of a hemorrhagic nature affecting fowls and swine 

 usually show the presence of bacteria in the vascular 

 system. 



Bacteria may be recovered from the blood in all forms of 



