usually swell.

It is sometimes difficult to diagnose the disease. The ulcers on the nasal
mucous membranes and elsewhere are very characteristic, and when present
enable the examiner to form a diagnosis. In cases of doubt, a
bacteriological examination of the nasal discharge may be made, or we may
resort to one or several of the various diagnostic tests. The Mallein test
is quite commonly used. The sterilized products of a culture of the _B.
mallei_ are injected beneath the skin of the suspected animal. This causes
a rise in body temperature and a hot, characteristic swelling at the point
of injection in glandered animals.

[Illustration: FIG. 116.--_Streptococcus pyogenes equi_.]

_Treatment is not recommended_ at the present time. Nearly all of the
States have laws which aim to stamp out the disease wherever found by
killing all affected animals, and thoroughly disinfecting the stables,
harness and everything which has been near the animal. Diseased animals
should be carefully isolated until slaughtered, and all animals exposed to
them should be subsequently tested for glanders.

CONTAGIOUS PLEUROPNEUMONIA (STABLE PNEUMONIA).--This is an infectious
disease of solipeds that usually results in a fatal inflammation of the
lungs and pleural membrane.

Many writers have described this disease as associated with influenza, but
it is frequently seen as a separate disease, usually involving only the
lungs and pleurae. It is prevalent in several parts of the United States,
more particularly the horse centers or large markets, where it appears in
the form of epidemics. In several of these localities it is known as