Botryomxcosis Tnnwrs. 



325 



tions in the epiderni nr llin)nj;h tlie o-lands of the skin, as botryo- 

 mycotic growths develop especially at places in the skin which 

 are frequently subject to friction (places worn by harness and 

 saddle.) Very frequently the growth involves the stump of the. 

 spermatic cord after castration, or the udder and penis sheath, as 

 well as the bursas and fasciae of. the withers, elbow and shoul- 

 der. The tissue invaded by these microorganisms becomes the 

 seat of a chronic inrtammation. At tirst it has a grayish-red color, 

 later becoming pale and translucent (like 

 bacon) ; and eventually a white cicatricial 

 connective tissue develops in the mass, 

 spreading through the loose cellular tissue 

 and over the surfaces of the fasciae and 

 producing enormous induration and thick- 

 ening* of the part. Or the process may 

 be more definitely limited to spheroidal 

 nodular masses which project from the sur- 

 face as fibroma-like tumors, ranging in size 

 from that of a fist to that of a human head 

 or larger. The growth of the clumps of 

 microorganisms in this fibroplastic tissue brings about foci of 

 softening of a viscid purulent type, sometimes of a distinct yel- 

 low color like ordinary pus, but commonly of a safit'ron or 

 orange tint, with formation of fistula? to the surface and paths of 

 confluence in the mass. As the result of multiple coincident or 

 successive infection of the skin there often are met dozens of these 

 botryomycomata in one subject. Convection of the microbic agents 

 by the lymph and blood leads to metastatic growths, especially in 

 the lungs. 



Fig. 85. 



Botiyoinyces ascofonnans 

 (low power). 



For fuller account cf. Kitt. Sprcicllc patliol. 

 II. Aufl. F. Enke, Stuttgart, 1901. 



\natoinic dcr Ilaiiticri 



New Growths, Tumors, Autoblastomata. 



By the terms new growths, tumors, new formations, neo- 

 plasms, autoblastomata (Klebs). ore meant tissue proliferations 

 of persistently progressive eliaracter, li'hieh alter the conforma- 

 tion of the part and disturb its function. These growths appear 

 as excessive tissite accumulations caused by cells of the animal 

 body which have become parasitic in nature and Avhich invade 

 the soft structures or skeleton of the animal as more or less 

 isolated and independent bodies. Enlarging sometimes slowly, 



