82 SWINE DISEASES 



Symptoms. The principal symptom of bronchitis 

 is a cough which in the beginning is dry but later becomes 

 moist. The cough may become convulsive. As the 

 disease progresses a nasal discharge becomes evident, 

 which is at first of the nature of mucus but later becomes 

 mucopurulent or purulent. Rales may be detected in 

 thin swine, or possibly in any of the bacon breeds, but the 

 chest wall of other swine is usually so thick that it prac- 

 tically prohibits the recognition of pulmonary conditions. 

 There is usually some rise of temperature in the beginning, 

 but this may subside. The appetite may be diminished. 



Treatment. Removing the cause and providing 

 sanitary surroundings will probably do more than 

 medication to relieve this condition. Supply easily 

 digested foods. If the swine can be controlled easily and 

 placed in a piggery that can be made practically airtight, 

 the animals may be successfully treated with medicated 

 vapors, using such agents as oil of eucalyptus. 



Verminous Bronchitis and Pneumonia 



Verminous bronchitis is very common in swine in the 

 United States; however, the infestation is -only rarely of 

 sufficient extent to produce serious damage. The lungs 

 from a thousand swine were inspected in a Kansas City 

 abattoir and sixty per cent of them contained pulmonary 

 Strongyli in such numbers that the lesions could readily 

 be observed by gross examination. 



Etiology. Metastrongylus apri is the causative 

 parasite of porcine pulmonary strongylosis. It is a 

 white or brownish-white thread-like worm from one inch 

 to one and a half inches in length. The adults inhabit 

 the middle-sized and small bronchioles, usually in the 

 posterior superior part of the lung, although they may be 

 found elsewhere in the lung. The ova are carried out 

 from the lung in the discharge and may pass out directly 

 or pass into the pharynx and be eliminated in the feces. 

 The exact life cycle is not known, but it is probable that 

 the ova hatch and undergo several moults before regaining 

 the animal body. The parasites gain entrance to the 



