358 LUNGS AND PLEURA. 



In rare cases abscesses caused by pyogenic streptococci may be 

 found. 



The anterior lobes, cardiac lobes, and lower part of the posterior lobes 

 are those singled out for attack. 



Diagnosis. The diagnosis is not difficult, provided that the circum- 

 stances preceding the appearance of the pulmonary lesions are known. 



Prognosis. The prognosis is very grave. 



Treatment. Treatment very often proves useless, because the patients 

 have little resisting power and are exhausted, and also because they are 

 suffering from a slowly progressive septicaemia. It may, however, be 

 worth w^hile in the early stages to apply blisters to the chest and ad- 

 minister general stimulants : alcohol in doses of 8 to 12 drachms per day, 

 divided into two parts and mixed with milk ; acetate of ammonia in doses 

 of ^ to 1 ounce ; and tinctura digitalis 5 to 6 drops. 



The primary disease of the intestine is masked by the pulmonary 

 symptoms, but should not be overlooked. Eice water, sub-nitrate or 

 salicylate of bismuth may be added to the milk or albuminous solu- 

 tions constituting the diet. When an epizootic of broncho-pneumonia 

 complicates the diarrhoea it is necessary to take all the preventive 

 measures which have been suggested in connection with white scour 

 and umbilical diseases in calves. These comprise disinfection of the 

 premises and local disinfection of the animals affected. 



SCLERO'CASEOUS BRONCHO-PNEUMONIA OF SHEEP. 



The sheep suffers from a special form of broncho-pneumonia, which 

 is seldom seen except in isolated cases, but which, under exceptional cir- 

 cumstances, may nevertheless attack a certain number of animals in a 

 particular flock. It was first noticed and described by Lienaux in 1896, 

 and has more recently been studied by Sivori (1899). Moussu has only 

 seen it in flocks in the north of France. 



Causation. The causes of this disease are still imperfectly under- 

 stood. 



Sivori's researches show that the disease may be referred to a micro- 

 organism, but we do not yet know exactly by what path infection occurs. 



The agent of sclero-caseous broncho-pneumonia in the sheep appears 

 similar to that described by Preisz and Guinard in 1891, and identical 

 with the microbe of ulcerative lymphangitis of the horse (Nocard, 1897). 

 It is probable that infection occurs through the respiratory apparatus. 



Symptoms. The clinical development of the disease is difficult to 

 describe, because its course is slow and unaccompanied by well-marked 

 external signs. 



The animals lose flesh, pant for breath when moved, drop to the 

 rear of the flock cough frequently, feed badl and end by becoming 



