There is a reason for warmth, "The most economical temperature" is found to be 36.7 degrees

The body temperature of most mammals, not limited to humans, is basically about 37 degrees C, although there are exceptions. I keep on burning energy at all times to keep this body temperature,Hyperthermic animalsIt is very bad fuel economy when compared with. Despite this, why is it so warm, as a merit of high body temperature,FungiIt is difficult to proliferate. The reason for getting a fever due to a cold is to raise the body temperature and try to reach a temperature at which bacteria as pathogens can not grow.

Yesever UniversityAlbert Einstein School of MedicineThe study found that "the most economical temperature" optimized for cost (energy) to raise body temperature and effect (inhibition of bacterial growth) is 36.7 degrees, which is found to be nearly consistent with the human heat .

Details are as below.News Capsules | 98.6 ° F Ideal Temperature for Keeping Fungi Away and Food at Bay

There may be some people who have experienced cleaning up cleaning mushrooms in the room, but because they did not wash their bodies and hair for a long time, mushrooms grew on their heads and molds fell under their armpits I have not heard such a story?

Ringworm(Athlete's foot and paddy rice) and so on, it is a state where mold has grown on the skin, but fundamentally, molds and mushrooms that you usually imagine do not grow on living human bodies. The type of fungus (fungus) that gets sick (infected) when it inhales and invades the body is also very limited. Even for mammals such as humans, harmful insects and amphibians cause harmless diseases. In fact, there are so many types of fungus, body temperature is its part.


Professor of Microbiology and Immunology at Albert · Einstein School of Medicine A previous study by Dr. Arturo Casadevall showed that each time the animal's body temperature rises the type of bacteria (fungi) that can grow (become pathogens) is 6% It is known to decrease. For this reason, thermocycles such as reptiles are infected with tens of thousands of bacteria, whereas homeothermic infections result in only a few hundred species. Professor Casadevall considers this would have greatly boosted the terrestrial sweeping by the mammals after the dinosaurs were destroyed.

MBioIn the latest research published in the magazine, Professor Casadevall also created a calculation model with Professor Aviv Bergman of System Calculation Biology at the Albert Einstein School of Medicine to estimate the cost (energy) versus effect of raising body temperature By analyzing), 36.7 degrees C conducted "the most economical temperature".


This calculation model is based on the principle that "type of infecting bacteria decreases by 6% when body temperature goes up by 1 degree" derived by the previous study, but this 6% parameter is in the range of 4% to 8% Even if it is replaced, the optimization temperature is 37.7 degrees to 35.9 degrees and it seems that it was in the range close to the body temperature of mammals. Moreover, this temperature is not influenced by the size of the animal's body.

"Why the body temperature is so high compared to other animals was one of the big mysteries related to evolved mammals including humans.The results of this study show that the body temperature of mammalian species is all close to 37 degrees It will be useful for explaining why it is, "Professor Casadevall says.

By the way, human sperm can not be made well unless it is at a temperature of 34 to 35 degrees lower than body temperature,TestesIt seems that it is cooling to the right temperature by hanging it out of the body, but when it gets attacked by this it has become a vital point of great damage. However, the risk of making a vital point may be insignificant compared to the risk that "12% increase in the type of bacteria that infects by lowering body temperature twice". Also, as you heat eggs, they solidify so that the tissues of the human body such as the brain and internal organsproteinAlso by heatDenaturationAnd it is said that there is a danger of life from around body temperature exceeding 42 degrees.