Hyperthermia and pyrexia

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A raised rectal temperature is a common finding on physical examination. It is important for the clinician to determine the cause of the raised rectal temperature and to differentiate pyrexia from hyperthermia. This chapter considers history, clinical signs, physical examination, diagnosis and differential diagnoses and treatment.

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18.2 A dog’s body temperature can increase rapidly if it is locked in a car, even on relatively cool days.
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18.3 Examples of digital rectal thermometers with rigid and soft tips.
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18.5 Suggested diagnostic work-up in a dog with pyrexia of unknown origin. If all tests are negative, referral should be considered. ANA = antinuclear antibody; CBC = complete blood count; CSF = cerebrospinal fluid; FNA = fine-needle aspiration.
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18.6 A 6-month-old Labrador Retriever being rapidly cooled with wet towels after being trapped in a hot car.
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