CHAPTER XXL 



BACTEEIA PATHOGENIC IN ANIMALS. 



Amongst the kinds of bacteria described in the pre- 

 ceding chapters^ there are a great many which are 

 also pathogenic in animals, and amongst these some 

 which only comparatively rarely occur in man. How- 

 ever, since they frequently cause more or less severe 

 diseases in him, they have for us a special interest, 

 and hence have been described in some detail. But 

 of the bacteria mentioned in this chapter, so far as is 

 known at present, one only, the glanders bacillus, is 

 also pathogenic in man, whilst the others are patho-- 

 genie in a greater or less number of animals. Of these, 

 in consequence, only a short account will be given. 



The glanders bacillus occasions, especially in horses 

 and in similiar animals, a very violent and infectious 

 disease, called glanders or farcy. The bacilli are 

 motionless, exceedingly delicate and short, with their 

 ends rounded off; they occur either singly or joined 

 together in pairs. Apparently they form spores, since 

 sraall strongly refractive granules are to be seen in 

 the cells; these granules have quite lately been dis- 

 tinguished from the surrounding plasma of the bao- 



