ANTHRAX IN ANIMALS 



349 



the glands, especially about the neck, actual necrosis with 

 ulceration may occur, constituting the so-called anthrax car- 

 buncles. Such subacute conditions are especially found among 

 horses, which are by nature not so susceptible to the disease as 

 cattle and sheep. Occasionally even in susceptible animals 

 recovery takes place. 



On post-mortem examination of an ox dead of anthrax, the 



FIG. 107. Scraping from spleen of guinea-pig dead of anthrax, 

 showing the bacilli mixed with leucocytes, etc. (Same appearance 

 us in the ox.) 



"Corrosive film " stained with carbol-thionin-bhie. x 1000. 



most noticeable feature one which has given the name "splenic 

 fever" to the disease is the enlargement of the spleen, which 

 may be two or three times its natural size. It is of dark-red 

 colour, and on section the pulp is very soft and friable, sometimes 

 almost diffluent. A cover-glass preparation may be made from 

 the spleen and stained with watery methylene-blue. On ex- 

 amination it will be found to contain enormous numbers of 

 bacilli mixed with red corpuscles and leucocytes, chiefly 

 lymphocytes and the large mononucleated variety (Fig. 107). 

 Pieces of the organ may be hardened in absolute alcohol, and 



