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Monday, 12 October 2026
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Severe long COVID linked to altered lung and mouth microbiomes

A study of over 700 human participants shows distinct oral and airway bacterial differences in people suffering from very severe long COVID symptoms.

FTMQ Health, written by our newsroom0 views

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Picture: Medical Xpress

People with long COVID show distinct differences in the mix of bacteria living in their mouths and lungs, Medical Xpress reported. The study involved more than 700 people and was published in the European Respiratory Journal. Researchers found that these bacterial variations are most pronounced in patients with very severe cases of the condition. [1]

According to Medical Xpress, the research indicates that changes in the lung microbiome directly connect to respiratory symptoms. The altered bacterial mix in the lungs also links to cognitive and digestive issues, which are known complications associated with long COVID. [1]

COVID-19 is a contagious disease caused by the SARS-CoV-2 coronavirus. The World Health Organization declared the disease a global health emergency in March 2020 before declaring the emergency over on May 5, 2023. [2]

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In short

  • A study of over 700 people links severe long COVID to distinct oral and lung microbiomes.
  • Bacterial changes in the lungs relate to respiratory, cognitive, and digestive long COVID symptoms.
  • The research was published in the European Respiratory Journal.

Sources

Every paragraph above points to the numbered items it rests on. Read the originals here.

  1. [1]Very severe long COVID linked to differences in lung and mouth microbiomesMedical Xpress, 2h ago (the report this story comes from)

Background

  1. [2]COVID-19 on Wikipedia

Our newsroom writes these reports with the help of software, from the 2 sources listed and nothing else, and checks them against those sources. Facts can still be wrong or move on; the originals are the record. Spotted a mistake? Write to daniel@monsterkong.com.

Earlier reports of ours on the same people and subjects.

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