MICROBIAL DISEASES OF MAN AND DOMESTIC ANIMALS 733 



organism differing very materially from Saccharotnyces farciminosus. 

 The case history and lesions produced parallel very closely those pro- 

 duced by the Saccharotnyces. This Sporothrix seems to have great 

 vitality, remaining virulent in dried pus at a temperature of — 7° for 

 three months or more. 



The same organism has been recovered from similar lesions of the 

 human where it was apparently acting as the direct exciting cause. 

 If this be confirmed, we have two very different organisms capable 

 of producing a similar mycotic lymphangitis. 



\ 

 DISEASES CAUSED BY BACTERIA* 



BOTRYOMYCOSIst 



Botryomyces equi 



We have typically in this disease closed abscesses with very tough 

 fibrous walls and slow development. These abscesses involve espe- 

 cially subcutaneous and intermuscular connective tissue, although 

 typical lesions have been found in various internal organs. 



This affection usually appears in horses, but botryomycosis has been 

 found in cattle and swine. 



The identity and proper classification of a specific microorganism 

 is still in dispute. Johne found il/. ascoformans acting as an etiolog- 

 ical factor. Kitt and others found micrococci which could not be dis- 

 tinguished from M. pyogenes. Moore found a variety of pyogenic 

 micrococci and streptococci apparently serving as causative agents 

 and reports one case of an enlarged spermatic cord where he found a 

 fungus resembling Actinomyces holds. In his later work Moore appears 

 to identify the botryococcus of Bollinger with Micrococcus pyogenes. 

 Others identify Botryomyces equi with Staphylococcus pyogenes aureus, 

 etc. 



Primary infection occurs by inoculation and not infrequently 

 follows surgical operations, e.g., castration. The primary infection 

 may then lead to involvement of internal organs by metastasis. The 



• Arranged alphabetically under each of the following families: Coccacea (.Micrococcus, 

 Streptococcus). Bacteriacece (Bacterium, Bacillus, Pseudomonas), Spirtllacea (Microspira). 

 t Prepared by M, H. Reynolds. 



