328 
E. NOCARD. 
and adherent by fibrous bands to the diaphragm and to the hy- 
pocardia. The tissue of the lung was the seat of an extensive 
sclerosis and hollowed with numerous cavities filled with thick 
grumous pus of a dirty white color, resembling mortar.* 
Besides this important lesion, there was another, much smaller 
and evidentlv more recent : the anterior lobe of the same lung 
- 
was the seat of grey hepatization with small caseous centres, 
analogous to those that we had previously observed in calves 
suffering with the slow form of white scour. And in all these 
cases the bacteriological examination of the alveolar exudate re¬ 
vealed the presence of the same pathogenous microbe, f 
Finally, if in the acute forms of white scour the pulmonary 
lesions are missing, they are almost constantly present in the 
subacute forms, which develop between four and six days ; in 
o-eneral they are not extensive, and affect the form of small 
diffused centres of broncho-pneumonia, of oedematous catarrhal or 
nodular pneumonia, or simply of atelectasia; but there is no 
doubt that those are the beginning, the initial phases of lung 
disease, because there also the same pathogenous microbe is 
found. Hence, it is easier to understand why calves which 
have had white scour die almost certainly of lung disease ; re¬ 
covery from the intertarsal infection does not prevent the already 
formed pulmonary lesion to continue its progressive develop¬ 
ment. 
II .—Most ordinarily white scour is fatal; but death occurs 
more or less rapidly. 
Sometimes the calf dies the very day of its birth, without 
showing the ordinary signs of the disease; it seems as if the 
diarrhoea has had no time to appear.^ 
_ 
* These pulmonary lesions are indeed promoted by a polymorphous bacillus which 
takes the Gram and which seems identical to the bacillus of ulcerous lymphangitis of 
horses or of the caseous broncho-pneumonia of sheep. 
\ This lesion resembled much the softer tubercles of chronic pulmonary phthisis ; but it 
was easy to distinguish them because the bronchial glands were healthy and the bacilli ot 
Koch absent from the pus. 
^ We heard of a farmer who this year has lost 14 calves , of these 6 died without the 
ordinary symptoms of white scour ; the others succumbed the very day or the day after 
birth, without having had any diarrhoea. 
