GENERAL DISEASES. 53 



follow upon the catarrhal symptoms. The visible mucous 

 membranes are yellowish in colour, the bowels are con- 

 stipated, the fever is quickened, and there is great pros- 

 tration ; the pulse is remittent, and the temperature varies 

 from lOr or 102° to 104°. 



C. Rheumatic Form. — This form usually manifests itself 

 towards the close of the ordinary symptoms of catarrh. It 

 may be diagnosed by the pain in the joints, which crack 

 when moved, and after a time swell. 



Although the joints are especially liable to be affected, 

 the muscles and the flexor tendons below the knee and 

 hock are also sometimes involved. The swellings, like those 

 of rheumatic fever, are metastatic. Cardiac complication 

 may appear in this form of influenza. 



Immunity. — One attack of influenza does not secure im- 

 munity from a second or even a third. 



Morbid Anatomy of Influenza.— There is inflammation 

 of the mucous membrane of the respiratory tract, extend- 

 ing into the minute bronchi, and pulmonary lobules are 

 thus often found collapsed. In the various complications 

 we find corresponding pathological lesions. In some large 

 towns, patches of ecchymosis have been noted in the stomach 

 and fore part of the alimentary canal. 



The blood is dark in colour, and contains micrococci. 

 ^ Treatment — The animal should be placed under good 

 hygienic conditions, and should be kept warm with rugs. 

 Eest is in all cases essential. 



The diet should at first be laxative, and consist of mashes, 

 linseed gruel, roots, etc. 

 ^'^ Medicinally, nitrate of potassium may be given in the 

 water. Also liquor ammonia acetatis and spirit of nitric 

 ether may be given in the form of a draught t^vv^ice or three 

 times daily. Sulphite of sodium in two drachm doses, or 

 sulpho-carbolate of sodium in one drachm doses, twice daily, 



