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ANNALES DE L’INSTITUT PASTEUR 
of great importance, more specially in relation to latent infec¬ 
tions. 
9. The fact that tubercle bacilli were still living and capable 
of a modifîed pathogenic action after being kept for nearly 
500 days in a natural tuberculous product (milk), supports 
the view that under certain circumstances tubercle bacilli are 
still infective after remaining dormant for a considérable 
period of time. 
v 
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