180 BOVINE PATHOLOGY. 



the breath fetid. The eyelids are swollen, admission 

 of light into the eye proves painful, and there is profuse 

 lachryraation. There is also a painful cough. 



Sloughing ulceration then sets in, the discharges from 

 mouth, eyes, and nostrils become purulent, and the latter 

 often sanguineous. Ulceration of the cornea may occur, 

 ulcers are visible in the Schneiderian membrane, and 



Fia. 25. — Malignant catarrh. Second stage. A horn lost, and nostrils, lips, 

 &c., ulcerated. (Armatage.) 



since these extend into the sinuses the pus becomes pent 

 up in these cavities. The vascular investment of the horn- 

 cores is involved in the diseased action, so that the horns 

 drop off. Red patches form in the mouth, and then 

 slough away. It is said the hoofs also sometimes fall oif, 

 BO that severe lameness is present. Pregnant animals abort. 



On post-mortem examination the sinuses are found full 

 of fetid pus, and their lining membrane very considerably 

 ulcerated. Superficial lesions and ecchymoses are evident 

 on the mucous membrane of the air and alimentary 

 passages. Ecchymoses also occur on the serous mem- 

 branes, and there is general venous distension with dark 

 blood. 



Treatment — Change of air as much as possible, nursing, 

 liberal steaming of the head. Administration of stimu- 



