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and having a long flagellum and acutaly pointed posterfor extremity. It was present in very small numbers. I have not
seen or heard of "hile sickness" in the Colony.
In addition to the above slides I have examined the
blood of all calves sent to me for vaccination but I have
never again found the spirillosis of cattle which I descrihed
some time ago.
Two cases of disease ir horses from the same stable
were examined, one was a case of nasal discharge the other
of chronic abcesses.Material from both animals gave Strauss'
reaction in guinea pigs and from one of these a non-gram
steining, non motile hacillus giving a sticky yellow growth
on potato was isolated. The investigation is not finished.
I had no mallein.
DISEASES OF RATS.
It has long been known that some diseases of man are contracted
from animals;moreover animals often suffer from diseases
which, though not the same, are closely allied to human diseases
and study of the one has thrown much light on the other.
It is no doubt through the channel of Comparative Pathology
that our knowledge of much that is obscure ir humen disease
will advance. In October last I commenced a research into
various diseases attacking rats in Hongkong, I hoped that it
might throw some light or the contagion of leprosy, tubercul-
-osis, cancer or some other human disease, the rodents being
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