672 
SOCIETY MEETINGS. 
all the characteristics of tuberculosis, symptoms are identical 
and can be recognized by the microscope only. 
Actinomycosis has been found in the mammary glands. Its 
evolutions also resemble tuberculosis. Outside of its localiza¬ 
tions on the maxillary bones it has been observed in the verte¬ 
brae and sternum. Here it invades the cancellated structure and 
by reproducing and developing causes the bony tissue to dilate 
and destroy, or the cancellated tissue may be absorbed. The 
growth is of a dense fibrous consistence and as the cause pro¬ 
gresses a spongy appearance of the bone appears, which shows 
centres of actinomycotic grains. Mystrom in 1895 mentions a 
case of enzootic actinomycosis developed in the pharangeal 
region amongst y6ung bovines maintained in the same pasture. 
Generalized actinomycosis, although being very rare, still is pos¬ 
sible. When the glands contiguous to the actinomycotic lesions 
become charged with the disease then it is possible we may find 
a contamination of the whole system. As the glands become 
invaded with the actinomyces a spongy appearance is observed. 
In course of time the gland tissue is destroyed and the actino¬ 
myces become liberated in the circulation, and unless destroyed 
by nature’s elements, and should a fruitful place of development 
be found, characteristic lesions may be seen. I am doubtful 
whether actinomycosis can be developed through the intestinal 
tract, as I believe the gastric juice of the stomach kills the 
germ or at least destroys their virulence or potency. My atten¬ 
tion was called to a large umbilical tumor on a steer at one of 
the abattoirs. O11 tumor being removed and dissected micro¬ 
scopical examination showed all the characteristic lesions of ac¬ 
tinomycosis. No other lesions were seen. 
Swine .—This disease has been observed in the larynx, tongue 
and mammary glands. These tumors are hard and painful and 
afterward unite in a large mass, sometimes discharging a 
creamy, thick pus and on examination will be found to contain 
actinomyces. They often become very large. Exceptional 
localizations have been found in the lungs. Knolle reports a 
case of generalized actinomycosis, the parasites being found in 
the tongue, serous membranes, liver and vertebra?. 
Sheep .—Actinomycosis of the sheep is rare. 
Horse .—Actinomycosis has been found in the horse in 
nearly all centres, but it attacks as in bovines the bones by 
preference.. In the tumors of the jaws we find a deliminated 
mass creating an abscess and persistent fistulous tracts, with a 
painful tumefication of the parts involved. In actinomycosis of 
