قالب وردپرس درنا توس
Home / Health / Since 2002, the body temperature of the indigenous people of the Amazon has dropped

Since 2002, the body temperature of the indigenous people of the Amazon has dropped



Tsimane’s residence, a group of indigenous people living in the tropical rural areas of Bolivia, South America.

Tsimane’s residence, a group of indigenous people living in the tropical rural areas of Bolivia, South America.
photo: Michael Gulvin/St. Luke’s Health System Kansas City (Associated Press)

A new study has found interesting changes in the average body temperature of the Tsimane people, an indigenous foraging and farming group in the Amazon region of Bolivia, which has recently begun to interact more with industrialized communities. In the past 16 years, Tsimane’s body temperature has dropped slightly, but rapidly, which is similar to the decline in Americans in the past century and a half.

In January this year, a study Find Evidence from well-maintained medical records shows that since the 1860s, Americans’ body temperature has dropped by approximately 0.05 degrees Fahrenheit every ten years.These findings are not the first, but they seem to be the clearest proof that these declines in body temperature are real, at least in places comparable to the United States.

One suggested explanation for the decline is changes in environmental health and public health, which have reduced the risk and incidence of infectious diseases in modern life. In theory, infections are reduced, and the immune system does not need to cause too much inflammation to fight off bacteria, thus cooling the body on average.

Anthropologist Michael Gurven of the University of California, Santa Barbara and his team decided to study body temperature trends in a unique way through long-term research work with the people of Tsimane in Bolivia.

Gulvin said in an email: “Reports about body temperatures below 98.6 degrees Fahrenheit are mainly from high-income countries such as the United States and the United Kingdom.” “I saw an opportunity to first assess in a very different context (rural What are the body temperatures in the tropics and whether they also drop over time.”

Tsimane is one of the few communities on earth that still live on small crops, foraging and hunting as before the crops were planted. However, in recent years, Tsimane has begun to further integrate with its industrialized neighbors, even sending her children to nearby schools. In other words, their journey can be seen as an accelerated version of the overall change of humanity over the past few centuries.

Gurven said: “Although the Tsimane environment today is similar to when we started working there 20 years ago, access to medicines, markets and other amenities has improved.” “So this gives us the opportunity to test. Will the body temperature in rural Bolivia also drop?”

Looking at medical records collected from 5,000 Timani Aboriginals from 2002 to 2018, Gulvin’s team found that Timani’s average body temperature has ranged from approximately 98.6 degrees Fahrenheit (37 degrees Celsius)ius) reached 97.7 degrees Fahrenheit (36.5 degrees Celsius) in 2002ius) in 2018.The research result is Published In scientific progress.

Although these changes echo the situation in the United States and other places, Gurven and his team believe that the explanation behind them is more complicated than simply reducing infections. On the one hand, despite the recent increase in life expectancy by more than ten years, the disease in Texas is still more common and widespread compared with other populations.

He said: “Our findings indicate that not only is the likelihood of a particular infection less likely to occur, but that our own body’s own infection experience may now be different from the past.” Such over-the-counter anti-inflammatory drugs, or our current state is better than in the past.”

The researchers said that the cause of the drop in body temperature in some parts of the world may be different from the cause of the drop in body temperature in other regions. The reduction in daily physical activity may lead to lower body temperature in some places, but this does not explain the trend in the Tsimane population, because they are still as active as before. Not all changes recently introduced to Tsimane are positive.Other research by the Gulvin team display With the introduction of edible oils to their communities, obesity rates have begun to climb in Tsimane (the average higher body weight has been proposed as a possible factor for cold bodies, but they found no evidence for this here).

In general, lower body temperature seems to be a reliable indicator of population health improvement over a period of time, just like life expectancy, Gulvin said, although more research is needed to determine.

Gurven said: “I want to see other people exploring whether similar patterns of body temperature drop are consistent with improved conditions, and whether these conditions can be extended to many other environments.” “It may also be the case, if the situation worsens, we may look Until the body temperature rises.”


Source link