A healthy gut microbiome may protect against severe sepsis, experts say, as new research links certain gut bacteria to stronger inflammatory responses.
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Instead, her condition spiraled into a severe case of sepsis that left her in the ICU for 10 days, including five days in a medically induced coma. Potentially deadly sepsis may be more likely in certain patients due to problems in the gut. Researchers from the Korea Research Institute of Bioscience and Biotechnology's Infectious Disease Research Center used female mouse models to investigate why sepsis outcomes can vary so dramatically.
The study, published in the journal Nature, looked at genetically similar mice with different gut microbiomes. The mice were infected with Acinetobacter baumannii — a highly resilient, examining differences in their gut microbiomes, the amount of bacteria in their blood and organs, and other cellular markers, according to the study press release. Although some mice were genetically similar, the more vulnerable mice had a higher concentration of Muribaculaceae bacteria in the gut.
In one comparison, these bacteria made up about 28% of the microbiome in poor surviving mice, but only 0.15% in better surviving mice. Mice with worse survival showed an early and strong inflammatory response, which later led to more bacteria in the blood, lungs and spleen.
This suggests that the microbiome causes theGUT MICROBES COULD BE KEY TO FIGHTING TOXIC, LONG-LASTING 'FOREVER CHEMICALS,' RESEARCH SAYS In the microbiome of mice with worse survival, the researchers also noticed that one strain of bacteria — Sangeribacter muris KT1-3 — was most prominent. The mice that typically survived at high rates fared much worse when housed with KTI-3 mice, with their survival falling to 10%.
Andrew Fleming, MD, section chief of Infectious Diseases & Immunology at NYU Langone Hospital, Brooklyn, said it has been"known for years" that"This process is particularly important in septic shock, where the intestinal wall becomes more permeable to translocation of bacterial products," Fleming said.
"But there is mounting evidence that a diverse and healthy gut microbiome – the community of bacteria that lives in a person's gut – is protective in some ways against severe sepsis," he went on. "And a dysregulated microbiome – for example, one severely alteredScientists are starting to think of the gut microbiome"almost as a living organ," according to Fleming, much like the heart, kidneys or liver, all serving"multiple functions" toAn unhealthy microbiome can have"detrimental effects across a range of health issues," he added – including how the body responds to infections.
"Compared to our other organs, we currently have fewer readily available tests in the doctor's office to measure the health of our microbiome," Fleming said. "However, this should not prevent us from thinking about our gut microbiome and how to keep it healthy. "The use of antibiotics has"major and long-lasting effects" on the microbiome, Fleming noted.
Up to 80% of adults in the U.S. are prescribed"Antibiotics deplete the diversity of the microbiome and create a void in the gut microbial community that can be filled by harmful bacteria from the environment," the doctor told Fox News Digital. Antibiotics"deplete the diversity of the microbiome and create a void in the gut microbial community that can be filled by harmful bacteria from the environment," the doctor said.
"We must begin to think much more critically about our antibiotic use and overuse, both to maintain our gut health and to reduce the spread of antibiotic resistance. ""Sangeribacter muris is not typically found in humans, so the exact mechanism of this bacterial strain worsening sepsis that is demonstrated in this study cannot be directly extrapolated to people," he said.
"Well-designedDespite these limitations, the doctor said he supports the hypothesis that maintaining a healthy gut microbiome can help keep the immune system well-regulated while reducing the risk of developing severe sepsis.
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