PRESENTATION OF SUBJECTS. 
341 
on local conditions or causes, ought to be considered as contagious 
epizootic. 
2d.—Considered from the physiological point of view, epi¬ 
zootic pleuro-pneumonia is specially distinguished in the living 
animal by its contagious character and the symptoms of lobar- 
pneumonia. 
3d.—In an infected stable, all animals that have either notice¬ 
able reacting fever, or either one of several symptoms showing 
the existence of an irritation of the respiratory organs, such as 
cough, increased and painful respiration, &c., should be regarded 
as suspicious cases. 
4th.—The manifest spontaneity of a case of pleuro-pneumonia 
does not preclude the existence of the contagious form of the dis¬ 
ease. 
> B.— Prophylaxy. 
1st.—The development of pleuro-pneumonia can be prevented 
in some cases by the simple help of good hygienic conditions. 
2d.—Diseased animals, or those suspected of disease, ought 
to be destroyed as soon as possible. 
3d.—Animals suspected of contamination, or milch exposed 
to contagion, should be isolated or destroyed. The slaughter of 
animals suspected of contamination is more specially indicated 
when the disease shows itself very exceptionally, or for the first 
time in a stable situated in a neighborhood where there are many 
cattle. 
4th.—Animals suspected of contamination, or very much ex¬ 
posed to contagion, not slaughtered, may be with benefit sub¬ 
mitted to inoculation, or to an appropriate preventive medication. 
Inoculation is specially preferable to slaughter when the animals 
belong to a large herd, subject to frequent changes, in which the 
disease has already made several appearances. 
5th.—Inoculation should not be prescribed as a general or ob¬ 
ligatory measure until some process shall be discovered whereby 
it may be practiced without danger to the health or life of the 
subject. 
6th.—Inoculation should be practiced only with the previously 
