INFECTIVE (iRANULOMATA. 



5bD 



border, the latter l)eing the result ctf cellular infiltraiiori. The 

 tissue adjacent to the denuded surface ma}- finally pr(tduce 

 sufficient ne\\- tissue or granulation tissue to repair the injury. 

 If the necr(.isis involves onlv the superficial e])itheliuni the re- 

 pair will be complete and there will be no scar, l)ut if tlit? 

 necrosis has involved the mucosa and portions of the suhnutco:^H. 



s.'d granulating 

 Or more 



Fig-. 200. — Nasal septa, shn-n-in^; ijlnndprous uU'i rs. 



A. A nasal s^-pfvm from K]and<-r<-fi hnrs<-. 



1. A cratrrirorm ulcer having a thick raised border with a depri- 



center. 



2. .^hou-s cliarac-t eristic outline of an ulcer, also fusion of twr 



priniary ulcers. 



3. Thumb tacks. 



B. A nasal septum fi'om a second glandeved horse. ,. ^ , . ^ „ ^^, 



1. Typical crateriform ulcrs and lar^.^ necrotic area the result of fusion of several 



ulcers. 



2. Cicatrices shown as irregular white spots, 

 3- Thumb tacks. 



