270 •Diseases of Cattle. 



but every member of the herd should be slaughtered before 

 the sun goes down, and the most energetic disinfecting 

 measures be taken with every thing about the premises. 



No form of disease in the lower animals is more fatal and 

 more contagious than this ; and any hesitation in " stamping 

 it out " at the very first will entail the loss of millions and 

 millions of dollars' worth of stock. 



Fortunately, it has never had more than a slight foothold 

 in this country ; but we are exposed to it almost every year, 

 and should be prepared to deal with it summarily and effec- 

 tually when it is introduced. 



Of the medicines which have been tried in its treatment — 

 and about all known to veterinary pharmacy have been ex- 

 perimented with — the most favorable reports have been from 

 bisulphite of soda, chlorate of potash, sulphate of iron and 

 carbolic acid, given by fall and frequent doses by the mouth 

 and by injection into the veins. 



PLEURO-PNEUMONIA— CONTAGIOirS LTTNG FEVER. 



Defnition. — A contagious fever of cattle, accompanied by 

 great prostration, together with local inflammation and other 

 diseased changes in the lungs and their envelopes. 



Cause. — This no doubt is a specific blood poison. It is 

 often slow in its development, several weeks or even months 

 elapsing between the exposure to the poison and the onset of 

 the disease. In its more malignant phases, and particularly 

 at the beginning of an epidemic, it runs a rapid course, de-* 

 stroying life in the course of a few days ; but generally oc- 

 cupies from four to six weeks. 



Symptoms. — The earliest symptoms are apt to pass un- 

 noticed. The fix'st that can be observed is a rise of tempera- 

 ture to 103°-106°, indicated by the thermometer in the 

 rectum. The moment this is observed when pleuro-pneu- 



