82 PARASITOLOGY. 
Disease Produced—Actinomycosis; lumpy jaw; 
big jaw. 
Distribution.—Widely distributed throughout the 
United States and Europe; especially common in 
the middle West. 
Animals Infected.—Man, horse, ox and hog. 
Parts Affected.—Superior and inferior maxilla and 
soft structures adjacent to them, glands of the head 
and neck; also lung tissue; rare in other organs. 
In the sow it has been found involving the mammae. 
In the ox it has been found in the liver, prescapular 
and superficial inguinal lymph glands. 
Description of Fungus.—The fungi appear in the 
pus as yellowish granular bodies. A microscopic 
study of these bodies shows clusters of club-shaped 
cells in ray formation; the small ends are directed 
inward, forming a rosette-like circle. 
