Text book of veterinary medicine, Volume 4 (of 5)Law, James
Science
Text book of veterinary medicine, Volume 4 (of 5)
Law, James
Veterinary medicine
_Symptoms._ These vary according to the species affected, and the seat
of the disease, general or local, _internal_ or _external_. In the
latter case the febrile and constitutional disturbance is delayed. In
the _internal_ cases the fever is early and of a high type. Even before
the animal appears to be seriously ill, while still keeping with the
herd and showing life and vigor, there may be high temperature, 104° to
106° F., pulse and breathing accelerated, heart beats tumultuous,
tremors or shivering or perhaps only staring coat, anorexia, and
grinding of the teeth. Later there may be drooping head and ears,
dulness, a disposition to lie, apathy, stupor and somnolence. Nervous
excitement and delirium have been noticed. The patient becomes weak,
especially behind, comatose, and the temperature declines to, it may be,
97° or even 94° F., prior to death. The visible mucosæ becomes dusky,
brownish or yellowish, and streaks of blood may appear in the nose or
elsewhere. The urine may be red, the fæces covered with mucus, or blood
streaked, and the rectal mucosa of a violet tinge, or blackish and blood
gorged. In this the vulvar mucosa often participates. Local swellings
may appear in the tongue or pharynx, even if not on the surface, or
colics indicate implication of the digestive organs. The examination of
the blood early reveals the presence of the bacillus, and as the disease
advances, its black, incoagulable, tarry, or coffee-grounds appearance
becomes characteristic. Pregnant animals are liable to abort. Death
occurs in 12 to 48 hours. Most cases are fatal at the beginning of an
outbreak, while later the great majority often recover.
_Fulminant cases_ (Anthrax acutissimus) occur mostly in cattle or sheep,
in high condition, the victim being found dead in pasture or stall,
without previous observation of illness, or, if seen during life there
is the sudden attack, leaving food, muscular tremors, anxious expression
of countenance, hyperthermia, dyspnœa, dark red mucosæ, it may be
streaks of blood on them, plaintive cries, rolling of the eyes, spasms
or coma, and death in a few minutes to one or two hours. In _sheep_
there may be separation from the flock, pawing, stretching, shaking of
head, turning in circle, dyspnœa, falling, convulsive struggling,
passing of blood by nose, kidneys or bowels and death.
_Local Anthrax in Cattle. Symptoms._ In _cutaneous anthrax_ the
circumscribed swellings appear suddenly, and may grow to considerable
dimensions on different parts of the skin, head, neck, breast,
shoulders, abdomen, axilla, sheath, udder, or flanks. There may be one
or many, and they lack the acute early tenderness, and later crepitation
of black quarter. On white skins they are dark red, or violet, and when
incised, show a gelatinoid, bloody, non-suppurating mass, abounding in
bacilli.
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