MEAT INSPECTION. 
501 
considered inocuous until the presence of the infecting ele¬ 
ment in the part in question has been fully demonstrated. 
It must be admitted with regard to the first proposition 
:hat these germs may exist in agglomerations in parts of the 
mimal not usually seen by the inspector, e. g. meningeal tu¬ 
berculosis. There is, further, very good evidence that the 
>erms of these maladies are transmitted from part to part 
tlong the natural course in the lymphatics. This is very 
licely shown clinically in actinomycosis in man and cattle, 
n the latter the origin of actinomycotic abscesses in the lym- 
)hatic glands in the region of the throat can frequently be 
learly traced post-mortem to an initial inoculation in the 
>harynx which has nearly left sufficient trace of invasion to 
lemonstrate the role which this part has played as the point 
»f inception of a disease which is to find a suitable field for 
evelopment only after the etiological moment has traversed 
jr a comparatively great distance through the channel of a 
mall vessel. We observe this lymphatic transmission most 
eautifully in antinomycosis of cattle, beginning at or near one 
f the feet and slowly but steadily moving along the course 
f the lymphatic vessels, destroying by suppuration the glands ; 
Dme of the germs even succeed in passing these sentries ere 
leir destruction prevents further progress, continuing their 
ivages toward the central portions of the body. Evidently the 
:tinomyces are usually some distance in advance of micro- 
epical pathological changes, and we cannot judge to what 
stent a part is invaded except by an utterly impracticable 
id laborious microscopical examination with but little war- 
mt of reliability. 
The migration of tubercle baccilli and actinomyces through 
le blood vessels seems to be proven beyond reasonable doubt. 
It is true that with but a few years’ study of these dis- 
tses we have recorded but few evident cases of such trans¬ 
ition ; but we feel that they quite suffice to overcome nega¬ 
te testimony, although possibly far more voluminous. 
Friedberger and Frohner (i) say that it seems possible that 
:tinomycosis can be disseminated by means of the blood, 
(1) Pathol, u. Therape d. Hausthiere, Bd. II, S. 545. 
