304 Veterinary Medicine. 



the pleura, causing effusions, false membranes, and gaseous pro- 

 ducts (pneumo-hydro-thoraxj . The bronchial glands are usually 

 congested, swollen, indurated, and pigmented, and may show 

 multiple miliary abscesses, without the tubercle bacilli of the cor- 

 responding condition in tuberculosis. Miliary abscesses may even 

 be disseminated through the aifected lung. On microscopic ex- 

 amination the affected bronchioles and alveoli are seen to be filled 

 with fibrinous material, red blood globules, leucocytes, and pus 

 cells. The foreign body may be found imbedded in this mate- 

 rial, sometimes even in giant cells imbedded in it. The infil- 

 trated portion may become the seat of abscess, or of necrosis. 



In wounds through the walls of the chest the lesions are con- 

 centrated around the foreign body and its track, and vary with 

 the structures involved. In foreign bodies travelling from the 

 reticulum, the track of the body is usually in the fornl of a fistula, 

 extending from the reticulum through the diaphragm, pleura, 

 left lung and pericardium, having very thick infitrated walls and 

 it may be attended by effusion into the left pleural sac and peri- 

 cardium. The foreign body is found at the anterior end of this 

 fistula. In some cases the fistula does not extend to the pericard- 

 ium, but toward some intercostal space. 



Symptoms. The fit of coughing during the giving of a draught 

 is usually the first symptom. It becomes encreasingly diificult 

 to give the draught without causing incessant coughing and the 

 accumulation of froth round the lips. Mucous riles are heard in 

 the lungs, the breathing is excited, and the animal blows its 

 nose, shakes its head and moves its feet showing general uneasi- 

 ness. These first symptoms may subside for a day or two, when 

 signs of bronchitis and pneumonia appear. The respiration be- 

 comes encreased, short, jerking, laborious, the nostrils dilated, 

 the head extended and the fore legs placed apart with the elbows 

 turned out. A loud mucous r§,le or clucking is heard in the 

 trachea and bronchi, and a moan may attend on expiration. 

 Percussion over the inferior and anterior part of the lung shows 

 limited areas of flatness, transmitting on auscultation, coarse 

 mucous, sibilant, or blowing riles and ronchi, and each showing 

 crepitation at its margin. As the disease advances an amphoric 

 sound may develop implying the opening of an abscess and the 

 formation of a cavity. In other cases the friction sounds may 



