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  • Title: Endotoxin fever in the rat.
    Author: Székely M, Szelényi Z.
    Journal: Acta Physiol Acad Sci Hung; 1979; 53(3):265-77. PubMed ID: 396758.
    Abstract:
    In rats intravenous injections of E. coli endotoxin at thermoneutral or slightly warmer environmental temperatures resulted in biphasic febrile response: two rises of temperature being separated by a transient fall. At an ambient temperature of 20 degrees C the change in body temperature still had a biphasic pattern, however, the fall was the dominant change. Each part of the response was the result of a coordinated reaction which involved heat production mechanisms (including interscapular and periaortic brown fat thermogenesis) and heat loss effectors (tail vasomotor changes) separately or in combination. Beside ambient temperature, the initial body temperature at the start of endotoxin action exerted an important role in determining which of the effector functions would be involved in the response.
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