LIVE STOCK. 



BJEPOBT by the Chief Inspector of Stock on the Infectious and 

 Contagious Diseases in Europe affecting or likely to affect the 

 Live Stock in Australia. 



I.— PLEURO-PNEUMONIA. 



1. — Nature. 



Pleuro-pneumonia in cattle, like all other constitutional dis- 

 eases, has its seat in the first instance in the blood, being febrile 

 in its earliest stages, but becoming typhoid in its second and third 

 or last stages, with a specific termination in disease of the lunga 

 and pleura?, the changes in which (in the shape of inflammatory 

 exudation) hold the same relation to the true disease that the 

 eruption in small-pox does to the blood state in that disease. 



The best authorities are in favour of not regarding this as a 

 local disease originating in and confined to the lungs and pleurae. 

 It is, therefore, properly speaking a misnomer to call it pleuro- 

 pneumonia, for it may never reach the second or third stages and 

 affect the lungs, but exhaust itself in the first or febrile stage ; and 

 it is upon this fact that the efiicacy of inoculation is based. 



2. — Cause. 



It has now been settled beyond all question that the cause of 

 pleuro-pneumonia is infection or contagion conveyed, either directly 

 or indirectly, from the diseased animal to the sound. 



3. — Symptoms and Post Mortem Appearances. 

 The course of the disease is generally divided into three 



First Stage. 



stages. 



In bush cattle the first noticeable symptoms of pleuro-pneu- 

 monia, which may be only temporary, are either an unusual 

 amount of coughing in a mob when on camp, especially after 

 nightfall, drooping of the head or ears, an apparent loss of spirit, 

 lagging behind the mob, disinclination to feed, a staring coat, a 



