Microbic Diseases Individually Considered. 209 



much injected and ulcerated, but also the spleen, 

 liver, kidneys, and mesenteric glands. Generally the 

 lungs are unaffected ; nevertheless, some foci of hepa- 

 tization may be noticed in the last stage of the slow 

 form of the disease. The skin of the neck and ab- 

 domen, and sometimes of the whole body, is red- 

 dened. 



Intestinal lesions, therefore, predominate in the dis- 

 ease studied by Salmon. 



The disease studied in France is characterized by 

 an intense fever with considerable prostration of the 

 affected animals, staggering gait and sometimes paral- 

 ysis. An intense and .fetid serous diarrhoea soon 

 supervenes; this is often preceded, and occasionally 

 followed, by constipation ; at the same time, or a little 

 later, symptoms of pulmonary trouble become evi- 

 dent : fitful hoarse cough, accelerated and embarrassed 

 respiration, and abundant mucous discharge from the 

 nostrils. 



The most conspicuous symptoms vary according as 

 the intestinal or pulmonary troubles predominate. In 

 the epizootic at Marseille enteritis was constant and 

 the pulmonary lesions incidental ; on the contrary, 

 broncho-pneumonia was the dominant feature in the 

 epizootic at Gentilly. MM. Cornil and Chantemesse 

 think that this peculiarity depends upon the mode 

 of entrance of the virus. The Gentilly hogs were 

 contaminated at the abattoir by inspiring air charged 

 with virulent dust, whilst those of Marseille con- 

 tracted the disease by ingestion of contaminated food. 



In the course of the disease a diffuse inflammation 

 often develops on the skin of the lower part of the 

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