TY - JOUR
T1 - Rapidly declining body temperature in a tropical human population
AU - Gurven, Michael
AU - Kraft, Thomas S.
AU - Alami, Sarah
AU - Adrian, Juan Copajira
AU - Linares, Edhitt Cortez
AU - Cummings, Daniel
AU - Rodriguez, Daniel Eid
AU - Hooper, Paul L.
AU - Jaeggi, Adrian V.
AU - Gutierrez, Raul Quispe
AU - Suarez, Ivan Maldonado
AU - Seabright, Edmond
AU - Kaplan, Hillard
AU - Stieglitz, Jonathan
AU - Trumble, Benjamin
N1 - Publisher Copyright:
© 2020 The Authors.
PY - 2020/10/28
Y1 - 2020/10/28
N2 - Normal human body temperature (BT) has long been considered to be 37.0°C. Yet, BTs have declined over the past two centuries in the United States, coinciding with reductions in infection and increasing life expectancy. The generality of and reasons behind this phenomenon have not yet been well studied. Here, we show that Bolivian forager-farmers (n = 17,958 observations of 5481 adults age 15+ years) inhabiting a pathogen-rich environment exhibited higher BT when first examined in the early 21st century (∼37.0°C). BT subsequently declined by ∼0.05°C/ year over 16 years of socioeconomic and epidemiological change to ∼36.5°C by 2018. As predicted, infections and other lifestyle factors explain variation in BT, but these factors do not account for the temporal declines. Changes in physical activity, body composition, antibiotic usage, and thermal environment are potential causes of the temporal decline.
AB - Normal human body temperature (BT) has long been considered to be 37.0°C. Yet, BTs have declined over the past two centuries in the United States, coinciding with reductions in infection and increasing life expectancy. The generality of and reasons behind this phenomenon have not yet been well studied. Here, we show that Bolivian forager-farmers (n = 17,958 observations of 5481 adults age 15+ years) inhabiting a pathogen-rich environment exhibited higher BT when first examined in the early 21st century (∼37.0°C). BT subsequently declined by ∼0.05°C/ year over 16 years of socioeconomic and epidemiological change to ∼36.5°C by 2018. As predicted, infections and other lifestyle factors explain variation in BT, but these factors do not account for the temporal declines. Changes in physical activity, body composition, antibiotic usage, and thermal environment are potential causes of the temporal decline.
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U2 - 10.1126/sciadv.abc6599
DO - 10.1126/sciadv.abc6599
M3 - Article
C2 - 33115745
AN - SCOPUS:85094826882
SN - 2375-2548
VL - 6
JO - Science Advances
JF - Science Advances
IS - 44
M1 - abc6599
ER -