480 



PLAGUE 



pneumonia." This is of broncho-pneumonic type, though large 

 areas may be formed by confluence of the consolidated patches, 

 and the inflammatory process is attended usually by much 

 hemorrhage ; the bronchial glands show inflammatory swelling. 

 Clinically there is usually a fairly abundant frothy sputum often 

 tinted with blood, and in it the bacilli may be found in large 

 numbers. Sometimes, however, cough and expectoration may 



FIG. 145. Section of a human lymphatic gland in plague, showing 

 the injection of the lymph paths and sinuses with masses of plague 

 bacilli seen as black areas. 



Stained with carbol-thionin-blue. x 50. 



be absent. The disease in this form is said to be invariably 

 fatal. In the septiccemic form proper there is no primary bubo 

 discoverable, though there is almost always slight general en- 

 largement of lymphatic glands; here also the disease is of 

 specially grave character. A bubonic case may, however, 

 terminate with septicaemia ; in fact all intermediate forms occur. 

 An intestinal form with extensive affection of the mesenteric 

 glands has been described, but it is exceedingly rare so much 



