134 CONTAGIOUS DISEASES OF DOMESTICATED ANIMALS. 



more profitable aiust it be for the United States in dealing with her one 

 exotic and imported plague, that of the lungs of cattle, which is still 

 confined to the merest strip of her territory", and when the proposed 

 control is to i)revent its extension over the w hole continent, and the ne- 

 cessity for a similar service and control from the Atlantic to the Pacific? 

 It would require but the outlay of a sum eqnal to half our yearly losses 

 on cattle exports by this cause alone to abolish this cause forever; it 

 would require but the expenditure of a trifling fraction to save us from 

 the future loss of millions. Again, if the independent nations of Europe 

 find it necessary to have an international system of repression and ex- 

 tinction to expel their prevailing animal plagues, and if they have to 

 sink national jealousies and rivalries in the presence of these interna- 

 tional enemies, will the United States of America, with a Federal Con- 

 gress and one Federal Executive, sacrifice to a sentiment our birthright 

 to the most extended live-stock interests in the world I 



Shall we calmly see the European states, with a legacy of ages of 

 Avarfare and mutual hate, and ground down by their immense standing 

 armies, the root and fruition of their common susjjicions, unite cordially 

 and loyally in a common international work to crush out the prevailing 

 infections of centuries nwd to secure an untrammeled trafiic in healthy 

 live stock and sound meat while our mutually dependent States, bound 

 in one federation, an unit in war, an unit in commerce, and, an unit in 

 all that relates to foreign nations — shall these States let a mutual jeal- 

 ousy prevent an interstate sanitary work court the general diffusion of 

 ourexotic infections, load the continent with animal plagues under which 

 modern conditions must be more ruinous even than those of Europe in 

 the past, and shut themselves out from supplying the meat market of 

 the world which it is now theirs to take and to hold ! 



2. CONTAGIOUS PLEUEO PNEUMONIA OF CATTLE. 



This subject was introduced by an extended report by Professor De- 

 give and two supplementary reports by Messrs. Leblanc and Putz. 

 Degive arrived at the following conclusions : 



A. — Differential diagnosis. 



1. From an anatomical point of view we may consider as contagious and epizootic all 

 i nterstitial pneumonias of a certain extent of wbicli the development does not depend 

 on local conditions or causes. i 



2. From a physiological stand-point, epizootic pleuro-pneiunonia is especially char- 

 acterized iu the living animal by its contagious character and the symptons of lobar 

 jdieumouia. 



:?. In an infected stalilc every animal that shows fever with one or more symptoms 

 denotiug irritation of the respiratory organs, cough, hurried, plaintive breathing, itc, 

 should be suspected of pleuro-pneuuiouia. 



4. The spontaneity of one case of pleuro-pueumonia will not exclude the existence 

 of the contagious aficction. 



