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The role of intestinal bacterial heat production in confounding postmortem temperature measurements

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Summary

To assess the influence of anaerobic bacterial heat production in human stools as a confounding factor in postmortem rectal temperature measurements, in vitro experiments were carried out with human stools incubated at 37°C for 6h and at decreasing temperatures simulating a postmortem body cooling. Although a statistical significant heat production was observed, it was not relevant enough to explain a postmortem temperature plateau or a substantial rise in the postmortem body temperature. The experiments suggest that stools merely reflect the environmental thermal changes rather than producing bias and confounding by a bacterial heat production.

Zusammenfassung

Proben menschlicher Faeces wurden anaërob für 6h bei 37°C und bei abnehmenden Temperaturen in vitro untersucht, um festzustellen, ob eine etwaige postmortale Wärmeproduktion in den Exkrementen einen Einfluß haben kann bei postmortalen rektalen Temperaturmessungen. Obwohl eine signifikante Wärmeproduktion beobachtet wurde, reicht sie nicht aus, um ein postmortales Temperaturplateau oder eine Zunahme der Körpertemperatur zu erklären. Die Experimente zeigen, daß die Faecesproben vielmehr die durch Umgebungsfaktoren bestimmte Temperaturänderungen widerspiegeln, als daß sie aufgrund ihrer bakteriellen Wärmeproduktion zu Irrtümern und Fehlern bei der postmortalen Temperaturmessung führen.

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Hooft, P., van de Voorde, H. The role of intestinal bacterial heat production in confounding postmortem temperature measurements. Z Rechtsmed 102, 331–336 (1989). https://doi.org/10.1007/BF00200222

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