42 PRINCIPLES OF VETERINARY SURGERY 



superficial exudation of leucocytes : it is found in bronchitis. 

 4. Desquamated, characterized by a desquamation, or 

 casting off of the epithelium, as in dermatitis. 



5. Vesicular or herpetic, characterized by the formation 

 of small vesicles or blisters filled with serous fluid: it is found 

 in herpes. 



6. Papular, forming little hard elevations or nodules, as 

 in equine syphilis. 



7. Pustular, having small elevations filled with pus ; 

 found in cow-pox. 



8. Diphtheritic or croupous, the surface of mucous mem- 

 brane covered with a pseudo-membrane, made up of fibrin, 

 leucocytes, and degenerated cells. The specific cause may 

 be the diphtheria bacillus or the streptococcus. It is found 

 in fowl diphtheria. 



9. Ulcerative, characterized by ulcers with a prolonged 

 suppuration, necrosis, or gangrene. 



10. Degenerative, accompanied by an unusual amount 

 of disintegration of tissue, as in tuberculosis with mixed in- 

 fection. 



11. Hemorrhagic, associated with hemorrhages into the 

 tissues; found in purpura hemorrhagica. 



12. Gangrenous, associated with gangrene. 



13. Suppurative, when the process culminates in sup- 

 puration, as in abscess. 



14. Phlegmonous, when cellular tissue becomes infil- 

 trated with pus ; found in some forms of cellulitis. 



15. Specific, one caused by definite known bacteria such 

 as symptomatic anthrax. 



The foregoing classification may be simplified by consid- 

 ering all the various forms under four divisions: (i) Exuda- 

 tive, characterized by serous, fibrinous and hemorrhagic dis- 

 charges ; (2) emigrative or purulent, associated with emi- 

 gration of certain corpuscular elements of the blood into the 



