Microhic Diseases Individually Considered. 389 



streptococci have been described in the vesicles of 

 aphthous fever, bacilli in rinderpest, micrococci in 

 cow-pox or vaccinia, as well as in enzootic hepatitis 

 of young pigs, etc. But not only is there a lack of 

 unanimity as to the morphology of the germs of 

 these diseases, but the study of their special biologi- 

 cal characters has yet entirely to be made, hence, a 

 particular acquaintance with these germs is only of 

 secondary importance to the practitioner. 



