Abstract
Identifying hyperthermia or hypothermia as the cause of death in an animal can be a diagnostic challenge to a veterinary pathologist. A complete history and prompt presentation of the animal for necropsy are very important. Deaths due to either hypothermia or hyperthermia have lesions which are sometimes nonspecific or mimic other disease conditions such as sepsis or disseminated intravascular coagulation or even postmortem change. Determining the cause of death in an animal which is presented frozen or was found dead in the sun in the backyard warrants close examination to document lesions including body condition and intercurrent diseases. The pathologist should request the complete history including where and when the body was found, diet, exercise routine, treatment, and available bloodwork. This in combination with gross and microscopic lesions can help to support a diagnosis of death due to heatstroke, sepsis, or other disease conditions. Morphological findings due to hypothermia are variable. Hyperthermia due to heatstroke usually has more definitive lesions of hemorrhage and necrosis in the intestines, heart, and lungs, but postmortem autolysis can hinder microscopic examination if the body is not examined promptly after death due to the elevated body temperature and intestinal permeability/sepsis which can develop quickly prior to death.
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Miller, D.M. (2018). Environmental Injuries. In: Brooks, J. (eds) Veterinary Forensic Pathology, Volume 2. Springer, Cham. https://doi.org/10.1007/978-3-319-67175-8_4
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