What is leptospirosis?
Leptospirosis is a bacterial disease of dogs that can affect the blood, liver,
or kidneys. It is caused by bacteria that are spiral shaped.
How do dogs acquire the infection?
The bacteria are carried mainly by rats and other rodents, but infected dogs
can also act as a source of the infection. Ingestion of infected urine is the
most important means of transmission, but some forms of the bacteria can penetrate
damaged or very thin skin. The incubation period (from infection to onset of
clinical signs) is usually 4-12 days.
What are the signs of leptospirosis?
Many infections go undetected, but many other cases can be life-threatening.
There are three main forms of the disease: hamorrhagic (bleeding), icteric or
jaundiced form (liver), and renal (kidney). In the hemorrhagic disease there
is early high fever with lethargy and loss of appetite. Multiple small hemorrhages
occur in the mouth and on the whites of the eyes. Bloody diarrhea and vomiting
may occur. This form is often fatal. The jaundice form begins much like the
hemorrhagic form, and many of the signs are the same. It differs in the presence
of a yellow color (jaundice or icterus) in the mucous membranes of the mouth.
The whites of the eyes are also a good place to look for the yellow color In
severe cases in dogs with white hair, the skin will turn yellow. The renal form
causes kidney failure. These dogs are very lethargic, anorectic, and experience
vomiting. There may be a characteristic offensive odor from the mouth and ulcers
often develop on the tongue and inside the lips. This form may be fatal, but
recovered dogs often have chronic kidney disease.
What is the treatment?
Antibiotics are reasonably effective if they are begun early enough in the
course of the disease. However, often dogs are so ill when presented that hospitalization
and intensive nursing care, including intravenous fluids, are usually necessary.
How can leptospirosis be prevented?
The vaccine for leptospirosis is generally part of the routine vaccination
program. Annual boosters are needed to maintain proper immunity.
Can the vaccine cause reactions?
The vaccine used is a killed vaccine and although, as with any vaccine, individual
reactions can occur, vaccination even of young puppies is unlikely to result
in any reaction to cause concern.
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