* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Saturday, September 6, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    ITV Studios Launches New Entertainment Label – Global Bulletin – IMDb

    ITV Studios Unveils Exciting New Entertainment Label

    TS Entertainment bringing Malibu Jack’s to former Owensboro mall – Lane Report

    TS Entertainment Launches Malibu Jack’s at Former Owensboro Mall Location

    Jenny Han Dropped a Major ‘The Summer I Turned Pretty’ Easter Egg Revealing [SPOILER] – yahoo.com

    Jenny Han Just Unveiled a Huge ‘The Summer I Turned Pretty’ Easter Egg That Changes Everything [SPOILER]

    Liam Payne’s Cousin Ross Harris Honors Late Singer With Emotional Song ‘Bones’ – yahoo.com

    Liam Payne’s Cousin Ross Harris Honors Late Singer with Emotional New Song ‘Bones

    Country music star apologizes after drunken show ends with cops taking him down: ‘I’m not OK’ – PennLive.com

    Country Music Star Apologizes After Drunken Show Ends in Police Intervention: ‘I’m Not OK

    Comanche Nation Entertainment closes casino near Devol – KSWO 7News

    Comanche Nation Entertainment Closes Casino Near Devol in Surprising Move

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Coherent Joins LLNL’s STARFIRE Diode Technology Working Group to Advance Inertial Fusion Energy – GlobeNewswire

    Coherent Partners with LLNL’s STARFIRE Team to Drive Breakthroughs in Inertial Fusion Energy

    Gene Associated With Deadly Heart Disease in Golden Retrievers Identified – Technology Networks

    Breakthrough Discovery Uncovers Gene Behind Deadly Heart Disease in Golden Retrievers

    Monkey Island LNG Picks ConocoPhillips’ Liquefaction Technology – Hart Energy

    Monkey Island LNG Selects ConocoPhillips’ Advanced Liquefaction Technology for Next-Gen Energy Solutions

    Credo Technology Group Holding Ltd. (CRDO) Surpasses Q1 Earnings and Revenue Estimates – Yahoo Finance

    Credo Technology Group Surpasses Q1 Earnings and Revenue Expectations

    The Economist is hiring a science and technology correspondent – The Economist

    Exciting Opportunity: Become Our Next Science and Technology Correspondent!

    Blockchain lender Figure Technology seeks to raise up to $526M in IPO (FIGR:Pending) – Seeking Alpha

    Blockchain Lender Figure Technology Sets Sights on $526M in Thrilling IPO Launch

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    ITV Studios Launches New Entertainment Label – Global Bulletin – IMDb

    ITV Studios Unveils Exciting New Entertainment Label

    TS Entertainment bringing Malibu Jack’s to former Owensboro mall – Lane Report

    TS Entertainment Launches Malibu Jack’s at Former Owensboro Mall Location

    Jenny Han Dropped a Major ‘The Summer I Turned Pretty’ Easter Egg Revealing [SPOILER] – yahoo.com

    Jenny Han Just Unveiled a Huge ‘The Summer I Turned Pretty’ Easter Egg That Changes Everything [SPOILER]

    Liam Payne’s Cousin Ross Harris Honors Late Singer With Emotional Song ‘Bones’ – yahoo.com

    Liam Payne’s Cousin Ross Harris Honors Late Singer with Emotional New Song ‘Bones

    Country music star apologizes after drunken show ends with cops taking him down: ‘I’m not OK’ – PennLive.com

    Country Music Star Apologizes After Drunken Show Ends in Police Intervention: ‘I’m Not OK

    Comanche Nation Entertainment closes casino near Devol – KSWO 7News

    Comanche Nation Entertainment Closes Casino Near Devol in Surprising Move

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Coherent Joins LLNL’s STARFIRE Diode Technology Working Group to Advance Inertial Fusion Energy – GlobeNewswire

    Coherent Partners with LLNL’s STARFIRE Team to Drive Breakthroughs in Inertial Fusion Energy

    Gene Associated With Deadly Heart Disease in Golden Retrievers Identified – Technology Networks

    Breakthrough Discovery Uncovers Gene Behind Deadly Heart Disease in Golden Retrievers

    Monkey Island LNG Picks ConocoPhillips’ Liquefaction Technology – Hart Energy

    Monkey Island LNG Selects ConocoPhillips’ Advanced Liquefaction Technology for Next-Gen Energy Solutions

    Credo Technology Group Holding Ltd. (CRDO) Surpasses Q1 Earnings and Revenue Estimates – Yahoo Finance

    Credo Technology Group Surpasses Q1 Earnings and Revenue Expectations

    The Economist is hiring a science and technology correspondent – The Economist

    Exciting Opportunity: Become Our Next Science and Technology Correspondent!

    Blockchain lender Figure Technology seeks to raise up to $526M in IPO (FIGR:Pending) – Seeking Alpha

    Blockchain Lender Figure Technology Sets Sights on $526M in Thrilling IPO Launch

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

How do fevers kill germs?

February 1, 2024
in Science
How do fevers kill germs?
Share on FacebookShare on Twitter

close up of an adult's hand holding a thermometer that reads 100.4. A young boy can be seen in the background under a blanket, as if ill

Fevers help spur a variety of immune processes in the body that help it fight infections.
(Image credit: Milan_Jovic via Getty Images)

They’re the hallmarks of cold and flu season: a sore throat, a blocked nose and, sometimes, a dreaded fever.

You may have heard that the warmth of a fever helps the body recover from illness. But how, exactly, do fevers help kill germs in the body?

Scientists know that elevated body temperatures play a role in helping the immune system fight infection: “The enhanced immune function during fever is at least partly caused directly by the fever because it can also be elicited by hyperthermia — that is, increased body temperature in the absence of an infection,” Anders Blomqvist, a neuroscientist who studies fever at Linköping University in Sweden, told Live Science in an email.

But just cranking up the heat might not be enough to thwart an illness, so other immune factors must also be involved.

Related: What’s the hottest temperature the human body can endure?

Fevers begin when immune cells at the site of an infection secrete pro-inflammatory cytokines — proteins that ramp up the immune response. To generate a fever, some cytokines travel to the brain and mess with the hypothalamus, which, among regulating other bodily functions, acts as the body’s thermostat. There, the cytokines boost the production of enzymes that synthesize fever-triggering chemical signals called prostaglandins.

In fact, fever-suppressing drugs such as acetaminophen (Tylenol) and ibuprofen (Advil) are thought to work by blocking these enzymes from making prostaglandins. 

Prostaglandins initiate several changes in the body that trigger a fever, which is often defined as a body temperature of at least 100.4 degrees Fahrenheit (38 degrees Celsius). Acting through the chemical messengers of the nervous system, they boost heat generation within brown fat reserves, which burn sugar. They also induce muscle shivering to build heat, and they limit heat loss by constricting blood vessels, especially near the extremities, like the hands and feet.

But how does turning up the heat affect the scuffle between pathogens and the immune system?

“Febrile temperatures have been shown to increase the immune response by stimulating both the innate and adaptive compartments of the immune system,” Blomqvist said. The former controls generalized immune reactions, while the latter “learns” to fight new pathogens as they enter the body. “But the underlying mechanisms are not fully understood,” he noted.

However, there are specific elements of the immune system that fevers are thought to boost. First-responder immune cells called neutrophils are recruited to the front lines at an infected site; these cells die shortly after service, so fevers may encourage a larger number to be drafted to the battlefield.

There’s also evidence that, during a fever, so-called dendritic cells develop a stronger tendency to engulf harmful microbes. By gobbling up germs, the cells can then present fragments of the microbes to adaptive immune cells, giving them intel on how to mount an attack tailored toward the invader.

Related: Can you catch a cold and the flu at the same time?

computer illustration of a large cell with long projections sticking out of it next to a smaller cell with little bumps on its surface

Dendritic cells (large cells) activate cells of the adaptive immune system (small cells) to fight specific germs. (Image credit: ARTUR PLAWGO / SCIENCE PHOTO LIBRARY via Getty Images)

Researchers have also proposed that fevers might hamper a pathogen’s chances of winning the battle by putting it in the hot seat. If a foreign invader evolves to infect the body at normal temperatures, its performance may dwindle when overheated as its enzymes might start to “cook,” losing shape and functionality. But, if the pathogen evolves to withstand fevers, it might then become less adept at infecting people at normal body temperatures. In essence, the pathogen might find itself in a catch-22 scenario.

Scientists face a major challenge in figuring out how fevers fight infection: The cytokines that trigger fevers also enhance other immune functions, so it’s difficult to tease apart the effect of the fever from these other immune boosts. For example, pro-inflammatory cytokines promote the migration of immune cells around the body. This ushers them to the infected site as well as immune tissues, like lymph nodes, where adaptive immune cells are trained to fight an infection.

Although the cytokines also play their part, Blomqvist argued that fevers play an important role in fighting foreign invaders. 

Studies show that intensive-care patients are more likely to recover from an infection if they develop a fever. The effect of fever-suppressing drugs is also telling: Doctors may feel it’s necessary to administer them if they’re worried a patient’s fever will rise to dangerous temperatures, but in less severe cases, using these drugs might disarm the body’s defenses.

“The most robust evidence for the beneficial effects of fever comes from preclinical and clinical studies showing increased mortality to infections when antipyretics [fever reducers] are given,” Blomqvist noted. Critically ill patients were more likely to survive if they only received fever-reducing acetaminophen at the last minute, before their fever crossed the danger threshold.

This article is for informational purposes only and is not meant to offer medical advice.

Ever wonder why some people build muscle more easily than others or why freckles come out in the sun? Send us your questions about how the human body works to [email protected] with the subject line “Health Desk Q,” and you may see your question answered on the website!

Get the world’s most fascinating discoveries delivered straight to your inbox.

Kamal Nahas is a freelance contributor based in Oxford, U.K. His work has appeared in New Scientist, Science and The Scientist, among other outlets, and he mainly covers research on evolution, health and technology. He holds a PhD in pathology from the University of Cambridge and a master’s degree in immunology from the University of Oxford. He currently works as a microscopist at the Diamond Light Source, the U.K.’s synchrotron. When he’s not writing, you can find him hunting for fossils on the Jurassic Coast.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Live Science – https://www.livescience.com/health/viruses-infections-disease/how-do-fevers-kill-germs

Tags: feversgermsscience
Previous Post

Ingenuity helicopter’s final images reveal fatal rotor damage that brought it down on Mars

Next Post

45,000-year-old bones unearthed in cave are oldest modern-human remains in Central Europe

HHS responds to report about autism and acetaminophen : Shots – Health News – NPR

HHS Addresses New Findings on Autism and Acetaminophen Use

September 6, 2025
September 2, 2025: Trump administration news – CNN

September 2, 2025: Trump administration news – CNN

September 6, 2025
Blending art, culture and native plants at Wakamatsu – Mountain Democrat

Discover the Harmony of Art, Culture, and Native Plants at Wakamatsu

September 6, 2025
The Two-Body Problem for Women in Science – Nautilus | Science Connected

The Two-Body Problem for Women in Science – Nautilus | Science Connected

September 6, 2025
How AI and Automation are Speeding Up Science and Discovery – Berkeley Lab News Center (.gov)

How AI and Automation Are Accelerating Breakthroughs in Scientific Discovery

September 6, 2025

American Trust Investment Services Serves as Exclusive Placement Agent in $9 Million Follow-On Offering for Nova LifeStyle, Inc. – Morningstar

September 6, 2025
Coherent Joins LLNL’s STARFIRE Diode Technology Working Group to Advance Inertial Fusion Energy – GlobeNewswire

Coherent Partners with LLNL’s STARFIRE Team to Drive Breakthroughs in Inertial Fusion Energy

September 6, 2025
EA SPORTS™ and New York City FC Extend Partnership to Power the Future of Football Fandom in NYC – New York City FC

EA SPORTS™ and New York City FC Join Forces to Transform Football Fandom in NYC

September 6, 2025
News – Ancient DNA Pinpoints Culprit Responsible for World’s First Pandemic – Archaeology Magazine

Ancient DNA Reveals the True Cause of the World’s First Pandemic

September 5, 2025
Fears of US recession as economy adds just 22,000 jobs – The Times

Fears of US recession as economy adds just 22,000 jobs – The Times

September 5, 2025

Categories

Archives

September 2025
MTWTFSS
1234567
891011121314
15161718192021
22232425262728
2930 
« Aug    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (809)
  • Economy (827)
  • Entertainment (21,704)
  • General (16,881)
  • Health (9,869)
  • Lifestyle (840)
  • News (22,149)
  • People (829)
  • Politics (835)
  • Science (16,038)
  • Sports (21,326)
  • Technology (15,808)
  • World (808)

Recent News

HHS responds to report about autism and acetaminophen : Shots – Health News – NPR

HHS Addresses New Findings on Autism and Acetaminophen Use

September 6, 2025
September 2, 2025: Trump administration news – CNN

September 2, 2025: Trump administration news – CNN

September 6, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version