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Antibiotic resistant bacteria inside a biofilm, 3D illustration. Realistic scientific background

Do Bacteria Warn Others While Dying from Antibiotics?

Scientists are learning more about the complex ways bacteria overcome efforts to control them

That’s what we learn from a new open-access paper in Nature titled “Dead cells release a ‘necrosignal’ that activates antibiotic survival pathways in bacterial swarms.” It’s sometimes described as “screams,” but it’s actually a release of chemicals, which amounts to the same thing: a warning to prepare for an onslaught of antibiotics. The scientists also noted another curious factor: The cascade of genes turned on by necrosignals not only protected the surviving swarm from antibiotics, but promoted future resistance to the compounds that killed their comrades. What’s more, the scientists realized that subpopulations of swarm bacteria were genetically variable; some were more susceptible to the antibiotics than others. Swarms of bacteria may collectively cultivate different subpopulations as an evolutionary survival…

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Antibiotic resistant bacteria inside a biofilm, 3D illustration. Biofilm is a community of bacteria where they aquire antibiotic resistance and communicate with each other by quorum sensing molecules

In What Ways Are Bacteria Intelligent?

As antibiotic resistance grows, researchers are discovering that these microbes are not just single, simple cells

Recently, Princeton University physicist Robert Austin challenged his graduate student Trung Phan to design a maze that he (Austin) couldn’t solve: Austin, Phan discovered, tended to retrace his steps when he encountered a dead end. So Tran decided on a maze without dead ends. The true purpose of the experiment, as Sophia Chen recounts at Wired, was to design a maze that bacteria can solve with remarkable skill based on their colony organization which, if you like, stands in for a brain: Curiously, bacteria—single-celled organisms that are among the simplest living things—are well known for working together, creating problem-solving units that are more than the sum of their parts. For example, to protect themselves from your immune system, the bacteria…

gloved hands with the laboratory tubes
Bacteria in Petri dish

Even Bacteria Are Purpose-Driven

The recent finding that bacteria can make individual decisions may help design better antibiotics

Does this mean that bacteria have free will? Not really; as Michael Egnor reminds us, free will is an immaterial quality of the reasoning mind. Life forms that lack a reasoning mind make decisions based only on their needs or desires.

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