Ira Shah
Normal Body Temperature
The hypothalamus is the heat-regulating center of the body and helps in maintaining a stable body temperature. The normal body temperature ranges from 37.0 degree C and 37.5 degree C with evening temperatures being 0.5-1.0 degree C higher than in the morning. Oral temperature is about 0.4 degree C below as compared to rectal temperature and axillary temperature is about 1 degree C below rectal temperature.

Persistent elevation of body temperature above the normal levels in an individual.

Due to infection, inflammation or immunologic reaction, there is release of endogenous pyrogens by phagocytic cells. The pyrogen acts on the thermoregulatory center increasing heat generation. Prostaglandins released act on the vasomotor center and prevent heat loss. Thus body temperature rises.

Intermittent fever - Fever that touches normal for a few hours during the day. It is seen in malaria, acute pyelonephritis, local boils and furuncles.

Remittent fever - Fever that fluctuates between 1.5 degree F in 24 hours without touching normal.

Continuous fever - Fever that does not touch normal and fluctuates less than 1.5 degree F in a day. It is seen in enteric fever, Bacterial endocarditis, viral pneumonia.

Fever Fever 02/28/2001
Characteristic Features of Different Types of Fever >>
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