Venoms: Venomous Animals and Antivenomous Serum-therapeuticsCalmette, A. (Albert)
Science
Venoms: Venomous Animals and Antivenomous Serum-therapeutics
Calmette, A. (Albert)
Antitoxins; Poisonous snakes; Toxins; Venom
The chemical reagent most to be recommended is _hypochlorite of lime_,
in a fresh solution of 2 grammes per cent., and containing about 90
c.c. of chlorine per 100 grammes. It immediately and surely destroys
the venom by simple contact, and the chlorine gas that it gives off,
owing to its great diffusibility, acts at a fairly long distance from
the point of inoculation on the venom which is already beginning to be
absorbed.
Professor Halford, of Melbourne, advises the direct injection into the
patient’s veins of from 10 to 20 drops of ammonia, diluted with an
equal quantity of distilled water. This is a means of reviving nervous
excitability in certain subjects at the commencement of intoxication;
but torpor soon reappears, and, if the dose of venom inoculated is
sufficient to cause death, a fatal ending takes place notwithstanding.
Experimentally the effects of ammonia are _nil_.
No better results are obtained by injections of strychnine, as
recommended by Dr. Mueller, in Australia. Moreover, the statistics
published by Raston Huxtable[106] positively condemn this therapeutic
method. They show that, in 426 cases of snake-bite, out of 113 treated
by strychnine 15 proved fatal, the ratio of mortality being 13·2 per
cent., while the 313 cases not treated by strychnine only resulted in
13 deaths, or a mortality of 4·1 per cent.
In the case of animals intoxicated by venom, injections of strychnine,
morphia, nicotine, or curare in small doses always prove ineffective;
they even considerably assist the progress of the intoxication and
hasten death. The use of these drugs in the case of human beings should
therefore be absolutely forbidden.
It appears, on the other hand, that alcohol and coffee, or tea,
absorbed by ingestion, are very often beneficial. Indeed, it was
long ago observed that the swallowing of alcohol until symptoms of
drunkenness appear retards or diminishes the phenomena of torpor and
paresis that precede the ultimate phase of the intoxication. Its use
may therefore be recommended when it is impossible to have recourse
to the only treatment really specific that modern science places in
our hands--_antivenomous serum-therapy_. It is important, however, to
state that, _when serum is used, alcohol must be forbidden_. The latter
hinders the effects of the former.
In practice, the rational treatment of the bite of a venomous snake
must be directed towards:--
(1) Preventing the absorption of the venom.
(2) Neutralising, by the injection of a sufficient quantity of
antitoxic serum, the effects of the venom already absorbed.
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