116 PRINCIPLES OF VETERINARY SURGERY 



rangements accompanying chronic suppuration. The 

 toxic product of pus cocci has also been described under 

 other names. Van de Velde called it leukocidin and claimed 

 for it the power of destroying the leucocytes. Wechsberg 

 named it staphylolysin. Ribbert produced lesions of the 

 liver, spleen, heart and kidneys by the injection of sterilized 

 cultures of pus cocci. Experiments along this line all show 

 analogous results from sterilized and unsterilized cultures. 

 It is, however, evident that the staphylococcus elaborates 

 but little, if any, free, extracellular toxin, because filtered 

 cultures, of high virulence, seem incapable of causing any 

 marked reaction. 



Antitoxin. — Several laboratories in both America and 

 Europe, widely advertise, and claim extravagant results 

 from, serum derived from streptococci, but the therapists of 

 the present day have not as yet been supplied with an "an- 

 tistaphylococcus serum." The streptococcus antitoxin is 

 claimed to be potent against suppuration. 



2. STAPHYLOCOCCUS PYOGENES ALBUS.— 

 This bacteriurq occurs only as an associate of the aureus, 

 with which it is so frequently found that the two are fre- 

 quently described under the name of Staphylococci Pyogenes 

 Aureus at Albus. Morphologically they are identical, and 

 they can only be recognized, one from another, by the 

 orange color the aureus imparts to the culture. 



Albus is non-chromogenic and but feebly pathogenic, 

 and when isolated, cultivated and then inoculated into ani- 

 mals it is found incapable of provoking any of the grave sys- 

 temic disorders produced by the aureus. Only a trivial, 

 local phlegmon results from subcutaneous injection of the 

 most highly virulent cultures obtainable. Its extraneous 

 abode is not known. It is found only in pus and then only 

 when associated with the aureus. The fact that the chromo- 

 genic function of pus cocci can be changed by various mani- 



