j 1893 
JOURNAL 
OF THE 
ROYAL MICROSCOPICAL SOCIETY. 
JUNE 1893. 
TRANSACTIONS OF THE SOCIETY. 
Y . — On Certain Cystic Worms found in Butchers Meat , and in 
Equine Animals , which simulate the Appearance of Tuberculosis. 
By G. M. Giles, M.B., F.R.C.S., F.R.M.S., Surg.-Major I.M.S. 
( Read 15 th March , 1893.) 
Plate IV. 
Of late, since the infectiveness of tuberculous meat has been estab- 
lished, the detection and discrimination of tuberculous lesions in the 
solid viscera of animals slaughtered for food has become a matter of 
considerable commercial and hygienic importance. The balance of 
experimental evidence may waver, but that the consumption of tuber- 
culous meat is a most risky dietetic experiment few would care to 
deny, and hence the growing popular demand for the destruction of 
all tuberculous meat is not only natural, but justifiable. 
Under these circumstances, it may be well to draw attention to 
certain lesions not uncommonly met with in sheep, oxen, and equine 
animals which, though entirely differing from bacillar tuberculosis in 
EXPLANATION OF PLATE IV. 
Pig. 1. — Section of liver of mule, showing four nematode tubercles. Zeiss A, 
Oc. 2. 
Fig. 2. — The same, under Zeiss C, Oc. 2. In the centre of the field is the 
tubercle, and quite in the centre of this may be seen an obliquely-cut piece of the 
nematode embryo. These two specimens were stained with gentian-violet, which 
leaves the structures of the tubercle comparatively untinged. 
Fig. 3. — Section of lung of sheep, showing a cestode tubercle placed just 
beneath the pleura which bounds the section above. The magnification is too small 
to show the embryo, whose position is indicated only by a hazy light spot placed 
about a quarter of an inch beneath the most prominent portion of the projection 
formed by the tubercle on the pleural surface. Zeiss A, Oc. 2. 
Fig. 4.— To show the general surroundings of the embryo in Fig. 5. Less magnified. 
Fig. 5.— Sectiou of liver of sheep, showing a living cestode embryo, which is 
seen as a tolerably sharply outlined pear-shaped body, placed exactly in the middle 
of the field, and, as seen in the photograph, about a quarter of an inch long by a 
rather less diameter. An interlobular vessel is seen close below it, while a short 
length of the branch on which it is placed may be seen leading up to its broader end. 
The three latter specimens were stained with borax-carmine. 
1893. 
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