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Direct effects of hyperthermia on pathogenic microorganisms: Teleologic implications with regard to fever
Abstract:
Fever recently has been the subject of numerous reviews in the clinical literature. Although most of these reviews have devoted considerable attention to studies concerned with the effect of temperature on the immunologic responses of higher animals, they generally have ignored data concerned with the direct effects of physiologic variations in temperature on pathogenic microorganisms. This review summarizes the current status of our knowledge of the reactions of clinically important microorganisms to variations in temperature within the physiologic range and attempts to relate data obtained from in vitro studies of these reactions to the still-unresolved question of the teleologic significance of fever.
Insights
Fever
Area of Science:
- Microbiology and Immunology
- Pathogen Biology
- Physiology
Background:
- Clinical literature frequently reviews fever, focusing on animal immune responses to temperature.
- Studies on pathogenic microorganisms' direct responses to physiological temperature variations are often overlooked.
- Understanding these microbial responses is crucial for interpreting fever's biological role.
Purpose of the Study:
- To review the effects of physiological temperature variations on clinically important microorganisms.
- To correlate in vitro data on microbial temperature responses with the teleological significance of fever.
- To highlight the understudied area of microbial thermoregulation in the context of host fever.
Main Methods:
- Literature review of existing studies on microbial responses to temperature.
- Analysis of in vitro data concerning pathogen reactions within the physiological temperature range.
- Synthesis of findings to address the evolutionary purpose of fever.
Main Results:
- Pathogenic microorganisms exhibit diverse reactions to temperature fluctuations within the physiological range.
- Specific temperature variations can significantly impact microbial growth, virulence, and survival.
- In vitro findings suggest that microbial responses to temperature may play a role in host-pathogen interactions during fever.
Conclusions:
- Fever's impact on microbial physiology warrants further investigation.
- Microbial temperature sensitivity may contribute to the evolutionary advantage of fever.
- Bridging the gap between microbial responses and fever's significance is essential for a comprehensive understanding.