1 66 SUPPURATION AND ALLIED CONDITIONS. 



suppuration, such as staphylococcus pyogenes citrens, staphy- 

 lococcus cereus albus, staphylococcus cereus flavus, bacillus 

 pyogenes foetidus (Passet), bacillus coli communis, bacillus 

 lactis cerogenes, bacillus pyocyaneiis, micrococcus tetragenus, 

 pneumococcus, pneumobacillus, diplococcus intracellularis 

 meningitidis, and others. 



In secondary suppurations following acute specific dis- 

 eases the corresponding organisms have been found in 

 some cases, such as gonococcus, pneumococcus of Fraenkel, 

 pneumobacillus of Friedlander, and the typhoid bacillus. 



Suppuration is also produced by the actinomyces and the 

 glanders bacillus, and sometimes chronic tubercular lesions 

 have a suppurative character. 



Staphylococcus Pyogenes Aureus. Microscopical Char- 

 acters. This organism is a spherical coccus about .9 /x in 



diameter, which grows 

 irregularly in clusters 

 or masses (Fig. 45). 

 It stains readily with 

 all the basic aniline 

 dyes, and retains the 

 colour in Gram's 

 method. 



Cultivation. It 

 grows readily in all 

 the ordinary media at 

 the room temperature, 

 though much more 

 rapidly at the tempera- 



ture of the body. In 

 stab Cultures On pep- 



tone gelatine a streak 



. . . . .. , 



of growth is visible 

 on the day after inoculation, and on the second or third day 

 liquefaction commences at the top. As liquefaction proceeds, 

 the growth falls to the bottom as a flocculent deposit, which 

 soon assumes a bright-yellow colour, while a yellowish film 

 may form on the surface, the fluid portion still remaining 



FlG. 45. Staphylococcus pyogenes aureus, 

 young culture on agar, showing clumps of 



Stained with weak carbol-fuchsm. 



