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Infectious Causes With infectious causes of cryptic fever, many animals have evidence of some abnormality on physical examination or routine laboratory screening. However, even diskospondylitis, pyelonephritis, leptospirosis, and the deep mycoses may present with no specific abnormalities. 4,6-10
Apr 1, 2010 · Cryptic fever, or fever of unknow origin, is defined in the human medical field as either a fever of greater than 3 weeks duration and an undetermined cause after one week of extensive in-hospital evaluation or a fever of greater than 2 weeks duration with no apparent diagnosis after routine diagnostics.
However, in a small percentage of patients, the cause of fever is not readily apparent, and the problem becomes persistent or recurrent. These patients are said to have fever of unknown origin (FUO). When the fever persists and a diagnosis is not obvious, these cases can become a challenge for both the veterinarian and the animal's owner.
UNCOVERING THE CAUSE OF FEVER IN DOGS Peer Reviewed 31 Infectious Causes With infectious causes of cryptic fever, many animals have evidence of some abnormality on physical examination or routine laboratory screening. However, even diskospondylitis, pyelonephritis, leptospirosis, and the deep mycoses may present with no specific abnormalities.4 ...
Often, a fever resolves on its own or in response to antibiotic therapy. However, in a small percentage of animals, the fever continues or keeps coming back and the cause cannot be determined. This is called fever of unknown origin. In dogs, the most common causes of fever of unknown origin are infections, immune-mediated diseases, and cancer.
- Andrew J. Allen
There are a large number of different diseases that can cause fever in dogs and cats. Some of these conditions are rare and can be hard to diagnose. In some cases the diagnosis may be a relatively common one, but the disease has presented in an unusual manner. In dogs we typically group the causes of fever (or FUO) into the following groups:
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Mar 8, 2019 · Dogs with true fever typically have body temperatures between 103°F and 106°F (39.5°C to 41.1°C). 2 Prolonged body temperatures above 106°F are dangerous and can result in organ failure, disseminated intravascular coagulation, systemic inflammatory response syndrome, and death. 1,3 Such temperatures are usually seen with nonfebrile causes of hyperthermia rather than with true fever. 4 ...
