ACTINOMYCOSIS. 
259 
ACTINOMYCOSIS. 
By Dr. G. F. Starkey, Boon, Iowa. 
A paper read before the Iowa State Veterinary Association. 
(Concluded ). 
If located in the connective tissue they develop slowly for 
a varying length of time, according to the resistance offered, but 
when this is reduced to the minimum they develop more rapidly 
and give rise to a tumor, from which they derive the name of 
lumpy-jaw; for it was long supposed by stockmen that this dis¬ 
ease affected only the jaw-bone. 
The tumor, which in many cases is firm and dense, may be¬ 
come indurated and remain so for years without change for 
years; but more frequently they break and discharge a creamy 
detritus which resembles pus, but lacks the specific micrococci, 
however, which is always present in pus. After discharging for 
some time, inflammation and congestion may subside and the 
opening may heal, leaving only a small cicatrix and slight in¬ 
duration of the skin, and this may be the last of that case o 1 
actinomycosis, for spontaneous recovery is not infrequent in this 
class of cases. More frequently, however, there is a large in¬ 
duration left after the fistula closes, and this induration contains 
some of the fungus that remains to cause a repetition of the 
changes just noted, after which a larger and more fibrous tumor 
results. The repetition may end in a complete cure in an en¬ 
crusted tumor that remains for an indefinite time without change, 
or pass rapidly from bad to worse, producing emaciation and 
death. 
When the salivary glands are affected, the process of en¬ 
larging and evacuating follows each other at shorter intervals 
than in the preceding, and according to my observations, spon¬ 
taneous cure never takes place. The entire gland (and sur¬ 
rounding tissues) are affected, and emaciation ensues, the case 
terminating as the preceding. In case the lymphatic glands are 
