anti-hog-cholera serum.]

THE VACCINATION OF HOGS WITH ANTI-HOG-CHOLERA SERUM.--The vaccination of a
hog by the single method consists in injecting hypodermically or
intramuscularly anti-hog-cholera serum. The immunity conferred may not last
longer than three or four weeks.

The vaccination of a hog by the _double method_ consists in injecting
hypodermically or intramuscularly anti-hog-cholera serum and hog-cholera
blood.

_The vaccination or treatment_ of a cholera hog showing noticeable
symptoms, or a high body temperature, consists in injecting hypodermically
or intramuscularly anti-hog-cholera serum (Fig. 87).

[Illustration: FIG. 86.--Preparing the hog for vaccination by washing the
part where the serum is injected with a disinfectant.]

[Illustration: FIG. 87.--Vaccinating a hog.]

_The region_ into which the serum and cholera blood may be injected are the
inside of the thigh, within the arm, flank and side of the neck (Fig. 86).
Two hypodermic syringes, holding about twenty cubic centimetres and six
cubic centimetres, and having short, heavy, seventeen or eighteen-gauge
slip-on needles, should be used. The small syringe is used for injecting
the virulent or cholera blood which is injected into a different part than
the serum. The quantity of serum and virus injected varies with the size
and condition of the animal. _Young hogs_ should receive one-half cubic
centimetre of serum for each pound of body weight, and _cholera hogs_
should be given one-half more to twice the dose that is recommended for