PREVENTION, SYMPTOMS AND TREATMENT 



205 



with symptoms and signs of pleuro-pneumonia and lasts a few days 

 or weeks. A correct diagnosis can rarely be made without a history 

 of prevalence of the disease or autopsy. 



'Treatment is unsuccessful and thorough eradication of the dis- 

 order can only be accomplished by slaughter of the sick and ex- 

 posed animals. The most thorough cleaning and disinfection of the 

 premises and contents are also required, as the infection persists 

 for over a year in an infected barn. (See p. 282). 



Pneumonia. 



1. Croupous or Lobar Pneumonia. — Most common in 

 horses, affecting the anterior lower part of lung, and on one side 

 usually. Seen also in cattle and dogs. Due to special infection and 

 therefore runs a regular course and is self-limited. Characterized 

 by high fever, rapid pulse and respiration (20-60), cough, dulness, 

 rusty nasal discharge, crepitant rales, bronchial breathing, dulness 

 on percussion, followed by moist rales and rapid fall of fever in 

 about six days. Often complicated with pleurisy. 



2. Broncho, Catarrhal or Lobular Pneumonia. — Occurs 

 in isolated, disseminated patches from extension of capillary bron- 

 chitis, in many cases, and seen in the young, as dogs, lambs, calves, 

 pigs, in the course of many infections (as distemper). It is that 

 form caused by worms in sheep, pigs and calves. Also it is due to 

 the aspiration of ingesta into the lungs (foreign body pneumonia) 

 following the giving of drenches improperly or to animals unable 

 to swallow readily, as in brain disease, acute pharyngitis, parturient 

 paresis, etc. Also to the entrance of foreign bodies from the 

 pericardium in cattle. In foreign body pneumonia gangrene of the 

 lung with foul breath and evidences of cavities are seen. Broncho- 

 pneumonia does not run the regular course of lobar pneumonia and 

 the signs occur in small areas of lung and are more difficult to detect. 

 With cough, high fever and rapid breathing it should be suspected, 

 especially following bronchitis. 



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