38 BACTERIOLOGY 



Other staphylococci are the Pyogenes citreus, the 

 lemon-yellow coccus, Staphylococcus cereus flavus and 

 cereus albus, and Staphylococcus flavescens, all of 

 which are of feeble pyogenic power. 



Streptococcus Pyogenes. A facultative anaerobic 

 bacterium found in the nasal passages, vagina, and ure- 

 thra. It is a much more dangerous germ than the Staphy- 

 lococcus and is the cause of spreading inflammations, 

 cellulitis, puerperal fever, erysipelas, otitis media, mas- 

 toiditis, septicemia, and pyemia. 



Bacillus Pyocyaneus (Bacillus of Green Pus). 

 Found in the skin, in the feces, and in pus; usually in 

 mixed infections, in otitis media, peritonitis, appendi- 

 citis, etc. 



SEPTICEMIA OR SEPTIC INFECTION 



In ordinary suppuration the pyogenic toxins alone 

 enter the circulation, causing the fever and other con- 

 stitutional disturbances. In sapremia the ptomains of 

 saprophytic bacteria, growing on blood-clots, stagnant 

 secretions, etc., enter the circulation, causing disturb- 

 ance, but in true septic infection both pyogenic germs 

 and their toxins enter the circulation. Manifestly, 

 such a condition is the most serious of the three, and 

 the most to be feared of all surgical accidents. 



Pyemia. The condition of septicemia in which there 

 are formed metastatic abscesses from septic material 

 in the circulation becoming implanted in various parts 



