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336 THE MICRO-ORGANISMS OF THE HUMAN MOUTH.

works terrible havoc in flocks of tiiie-wooled races. The symp-
toms of the disease are, consecutively, weakness, loss of appetite,
foaming at the mouth, redness of the gums, swelling of the gums
and formation of pockets around the neck of the teeth, epithelial
defects, ulceration, loosening of the teeth, periodontitis, perios-
titis and concomitant caries (of the bone), falling out of the
teeth (Gips).
The disease appears in the autumn when the animals are put
in the stall, attacking chiefly lambs or older animals which are
in poor condition, badly fed, ansemic, etc.
Here apparently, as in the
human being, predisposing
causes play an important role.
In stomatitis ulcerosa in the
calf, A. Lingard and E, Batt
(London Lancet, May, 1883)
have described peculiar l)acilli
occurring in the tongue and
buccal mucous membrane (Fig.
121). The typical ulcer in ad-
vanced cases consists of a sore
with free overhanging edges.
On section through the sore, the
tongue is found necrosed to a
considerable depth. " When-
ever the sore touches any other
partof the mouth or cheek, the
From a Section tiikuiuh Toxuue oi'
Calf, ulcerative stomatitis. disease is communicated and
700:1. (After Klein.)
rapidly spreads. In some cases
similar necrotic changes had taken place in the lung. The line
of junction of the necrotic wdth the healthy tissues was found to
be occupied by a dense mass of bacilli having the appearance of
a dense phalanx advancing upon the healthy tissues. The
disease has been proved capable of transmission (to the rabbit
and mouse) by injection of the bacilli in question, which are
equally numerous and virulent after passing through several
generations by inoculation." The disease often ends fatally in
calves (Klein).