These two conditions have a common cause and thus often occur together. In
fact, sore throats usually do not occur in dogs as
isolated infections, the way they do in people. Most sore throats are
associated with infections in the mouth, sinuses, or respiratory tract. They
can also occur with systemic diseases such as parvovirus, distemper,
herpesvirus, and pseudorabies.
Dogs with an anal gland infection may also have a sore
throat from spreading the infection while licking at their glands.
The signs of sore throat are fever, coughing,
gagging, pain on swallowing, and loss of appetite. The throat looks red and
inflamed. A purulent drainage may be seen coating the back of the throat.
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The group A streptococcal sore throat (commonly known as strep throat) that
occurs in young children can produce mild or unapparent sore throat in dogs and
cats, who may then harbor the bacteria in the respiratory tract. Although dogs
usually get the infection from human members of their family, and not vice
versa, to eliminate the bacteria in households with recurrent strep throat,
consider treating pets as well as family members.
The tonsils are aggregates of lymph tissue located at the back of the throat
in dogs, as they are in people. They may not be visible unless they are
inflamed. This generally occurs as a secondary symptom of a sore throat.
Primary bacterial tonsillitis is rare. It occurs in young dogs of the
smaller breeds. Symptoms are similar to those of a sore throat, except that
fever is more pronounced (over 103°F) and the dog appears depressed. The
tonsils are bright red and swollen. Localized abscesses may be visible as white
spots on the surface of the tonsils.
Chronic tonsillitis with tonsil enlargement is caused by persistent
infection or by mechanical irritation from
prolonged coughing, retching, or regurgitation of
stomach acid into the throat. Any dog showing signs of tonsillitis should also
be checked for anal gland problems, as grooming and
licking the anal glands can spread the infection to the mouth.
Treatment: Acute pharyngitis and tonsillitis respond to treatment of the
underlying condition. When a primary cause cannot be identified, treatment
involves giving a broad-spectrum antibiotic for 10 days. Feed a soft diet
consisting of canned dog food
mixed with water to make a mush.
Enlarged tonsils must be distinguished from lymphoma and
squamous cell carcinoma-the most common cancers of the tonsil. This is done
by biopsy. Tonsillectomy for chronically inflamed tonsils is seldom
WebMD Veterinary Reference from "Dog Owner's Home Veterinary Handbook"