CHAPTER XVII. 



PYOGENIC BACTERIA IN DOMESTIC ANIMALS STREPTOCOCCUS 



E QUI_STREPTOCOCCI IN MORBUS, MACULOSUS EQUI, AND 



PLEUROPNEUMONIA IN HORSES BOTRYOCOCCUS 



ASCOFORMANS PYOGENIC BACTERIA IN 



CATTLE BACILLUS PYOGENES SUIS. 



THE common pyogenic bacteria described in the preceding chapter 

 are in man, in the majority of cases, the cause of suppurative inflam- 

 mations, septicemia and pyemia. They are also very frequently 

 responsible for the identical pathological processes in domestic animals. 

 Karlinski investigated a large number of pyogenic affections in man 

 and animals and found the various causative bacteria as follows : 



Lucet made a bacteriological examination of 93 cases of suppura- 

 tions of various types in horses and found Staphylococci in 86 cases. 

 The three varieties were found either in pure or mixed cultures, but 

 the Staphylococcus pyogenes albus appeared more commonly as the 

 cause of suppuration in the horse than the Staphylococcus pyogenes 

 aureus. In man the contrary is true. Schiitz, Jensen, and Nocard 

 similarly found Staphylococci in most cases of suppuration in the 

 horse, and Streptococcus pyogenes also occurred in a number of cases. 

 Pyogenic Staphylococci and streptococci have also been found in 

 pyogenic, metastatic joint affections in horses, particularly when 

 young; occasionally as the cause of suppuration and erysipelas in 

 cattle, and also in puerperal fever in cows. Ordinarily, cattle do 

 not seem very susceptible to infection by these pyogenic bacteria. 

 Dogs, however, are more susceptible. Streptococcus pyogenes has 

 further been found as the cause of obstinate eczema of the tail of 

 the horse. 



A number of bacteria acting as specific pyogenic microbes for 

 certain domestic animals will now be considered briefly. 



