_Ruminants_ are much less susceptible than horses. Cornevin’s attempts
at poisoning failed through their refusal of the plant. Müller observed
in a case of cattle poisoning, bloating, paralysis of the limbs
(especially fore limbs), sleepiness, dilatation of pupils, and later
salivation, nausea, coma and occasional convulsive movements of the
muscles of the extremities. These symptoms persisted through several
days and then disappeared.
REFERENCES.
4, 16, 63, 64, 81, 128, 144, 161, 190, 205, 213.
=Broom= (_Cytisus Scoparius_ Link.). This very plentiful and widely
distributed plant is undoubtedly to some extent poisonous, though
perhaps only feebly so in the quantities likely to be eaten by domestic
animals. Blyth records 400 cases of poisoning from it, however. Very
hungry animals might eat too much of it, and hence show symptoms of
poisoning.
_Toxic Principle._ The plant contains the alkaloid _Cytisine_
(C_{11}H_{14}N_{2}O); also the volatile alkaloid _Sparteine_
(C_{15}H_{26}N_{2}), a single drop of which, according to Blyth, killed
a rabbit, which showed symptoms similar to those of nicotine poisoning.
_Symptoms._ Taken in sufficient quantity broom induces narcotic
poisoning, with symptoms resembling those caused by Coniine, with
central nervous paralysis.
Cornevin gives the symptoms as similar to those due to _C. Laburnum_.
REFERENCES.
4, 16, 82, 128, 203.
=Indian Peas= (_Lathyrus sativus_ L.). A type of poisoning that deserves
attention here is that known as _Lathyrism_, since it is due to the
consumption of peas of the genus _Lathyrus_, the most dangerous being
the “Indian Pea,” _L. sativus_. The peas of this plant (see
Frontispiece) are small and dark-coloured, and are imported largely from
India and other countries under the general name of Mutter peas, a name
which they share with the ordinary pea _Pisum sativum_. In addition to
the seeds of this species the seeds of two South European and North
African species—_L. Cicera_ and _L. Clymenum_—have commonly caused
poisoning both in man and in animals, not infrequently leading to fatal
results. Horses, cattle, sheep and pigs have been affected—horses
particularly so—and many cases have been recorded in the veterinary
journals since 1885. Very heavy losses have occasionally resulted from
the use of the raw peas as a food for stock. For example, in 1884
Messrs. Leather of Liverpool had 35 out of 74 cart horses ill through
eating Indian peas at the rate of 3 to 4 lb. per head per day. Of the 35
no less than 19 died, and 2 were slaughtered, while 14 recovered. In the
famous Bristol Tramways case (1894) 123 out of 800 horses became ill
owing to being fed on the peas of _L. sativus_, and many died. There are
few records of harm to cattle, sheep and pigs, and Watt quotes Don to
the effect that pigeons lose their power of flight by feeding on the
peas.
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