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lesions to the naked eye looked tubercular but the tubercle bacillus was not found by staining and inoculated guinea pigs have so far remained healthy (one died of rlague).In most of the lesions the caseating process has been too advanced to allow of obtaining sections but one which has been exem- -ined did not shew tubercles; moreover generalised tuberculosis has not been found. A proportion of the caseous lumps and ch- -ronic abcesses were no doubt due to degenerated parasitic cysts.Livers of rats are sometimes found containing hundreds
of these cysts the true substance of the liver being almost
absent and all stages of the degenerative process are found
in the liver from cysts containing dead worms to encapsuled
abscesser, the sequence is not however clear in other organs.
It may he said that tuberculosis is very common amonest
the Chinese, and that tuberculosis of native Chinese cattle
is excedingly rare. Rats are recognised to be highly resisted
to expermental inoculation with tuberculosis.
Cancer The following are examples of neoplasms.
I. An old male decumanus rat showed flattened white snots up
to 2.m.m. ir diameter and very numerous in number on the
parietal and vesceral
lavers of the serous membrames of the
were
chest and abdomen.T hev are almost absent from the anterior
abdominal wall though very numerous on each side of the "pine.
the right kidney was enlarged to about three times its nam
-tural size,When cut its consistency and appearance resem-
-bled those of a rapidly erowing cancer. Some of the omentum
was thickened to quarter of an inch by white modules massed
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