XL] BACILLUS : PATHOGENIC FORMS. 143 



bacilli which form leptothrix filaments, and in them spores soon make 

 their appearance. Filtered papayotin solutions, when injected into the 

 blood of rabbits, kill like unfiltered ones, but neither during life nor 

 after the death of the animals could any organisms be detected in the 

 blood. It appears to follow from these experiments, that papayotin 

 solutions contain spores, and that these spores are those of a bacillus 

 subtilis which does not possess any specific pathogenic properties. 



(k) Bacillus of symptomatic anthrax (Ger. Rauschbrand, 

 Fr. charbon symptomatique, Arloing, Cornevin, and Thomas, 

 Bull, de lAcad. 1881 ; Eng. black leg, quarter- evil]. This 



FIG. 77. BLOOD OF A GUINEA-PIG DEAD OF SYMPTOMATIC ANTHRAX. 



Blood-corpuscles and between them several bacilli. 

 Magnifying power 700. (Stained with Spiller's purple.) 



disease, which is not uncommon in cattle, generally ends 

 fatally and is very infectious. It is characterised by haemorr- 

 hagic effusion (or " tumour ") in the subcutaneous and inter- 

 muscular tissues of one or other, or both, anterior or posterior 

 extremities, in consequence of which the movements of the 

 animal so affected become greatly impeded. The animals 

 generally die in the course of the second or third day after 

 infection. The subcutaneous tumour contains numerous 

 bacilli, as do the abdominal and thoracic viscera. 



The bacilli are about the size of those of malignant anthrax 



