264 



PATHOGENIC BACTERIA. 



tive bronchopneumonia with adhesive inflammation of 

 the contiguous pleura. After the formation of the pleu- 

 ritic adhesions the disease may penetrate the newly 

 formed tissue, extend to the chest- wall, and form external 



FIG. 69. Section of liver from a case of actinomycosis in man (CrookshanU). 



sinuses. Or it may penetrate the diaphragm and invade 

 the abdominal organs, causing an interesting and charac- 

 teristic lesion in the liver and other large viscera (see 

 Fig. 69). 



Microscopically the lesion consists chiefly of a round- 



