792 UOAKD OK ACiRU'lJI/rUKK. 



illness, is from ttMi to lirtccii cl.iys. 'Ilio yi)ung pigs become affected tirst 

 whik' n large percentage of those over four months will escape. 



Symptoms. — The first and most prominent symptom is that of cough- 

 ing, and this persists throughout the entire course of the alTectiou. 

 There is also more or Jess dilUculty in hreathing. The cough at tlrst is 

 weak, but soon becomes loud and is attended with considerable effort. 

 It comes on in paroxysms, and then there is a longer or shorter Interval 

 of quietude. They are almost certain to occur when the pigs first stir 

 about and when they talce their meals. If the quarters are clean and 

 the weather pleasant the coughing is about the only symptom observable. 

 There is little loss of appetite and little fever. If the weather becomes 

 cold, wet or stormy, the paroxysms of coughing come closer together, 

 sometimes amounting to almost continuous coughing. There will be a 

 marlced difficulty in breathing, loss of appetite and fever. There will be 

 other symptoms of illness, as rough coat, stiffness and weakness. Under 

 such conditions there will be a considerable loss of the weaker pigs iu the 

 litter, and especially those imder eight weeks of age. 



The disease may be confused with swine plague or hog cholera. It 

 can be differentiated from the plague from the fact that the latter disease 

 attacks older hogs, and the death rate is highest in old hogs. It can be 

 distinguished from cholera by the fact that there is little bowel disturb- 

 ance and much lower death rate. 



Pcst-^Iortem.— A post-mortem examination reveals clearly defined 

 red patclips spread over the lungs. They are most numerous along the 

 edges, particularly along the lower edge of the anterior lobes. On section 

 they show a uniform red color or dirty, rusty gray. They are more solid 

 than normal tissue. There will be more or less frothy mucous in the dis- 

 eased areas and liie ))ronohi are injected with blood. The lung tissue is 

 firm and dry. The lung pleura over the affected area is diseased, but that 

 opposite on the costal pleura is seldom involved. The heart and pericar- 

 dium remain normal unless the lung is affected in the immediate vicinity. 

 The bronchial glands sliow enlargement. The alidominal viscera remain 

 normal. 



Treatment.— As far as possible tlie treatment should be preventive. 

 Pigs that are coughing should not be turned into lots with pigs that 

 appear healthy. Should the disease break out in a litter, the Avhole litter 

 should be removed from the piggery, the bedding burned and the pen 

 whitewashed. The pigs should not be allowed on the range used by 

 other pigs. 



Tlie treatment of the disease itself consists in securing dr.y, clean 

 quarters, as little exposure as possible, rich but not bulky food, and 

 trust that age will help give resistance. The administration of creolin or 

 coal tar creosote preparations at the rate of a teaspoonful to the hundred 

 pounds of weight has a good effect. It is best given mixed witli tlie 

 milk. 



