Bacteria with Antibiotic Resistance Mutations Reproduce Faster than Non-mutated Bacteria



By naturalsciencenews.com

A team of researchers has recently discovered that bacteria reproduce rapidly when exposed to antibiotics. This allows the bacterial colony to develop mutations for antibiotic resistance faster, speeding up evolution. The details are in a paper that was just published in the journal Nature Ecology & Evolution.

Antibiotic resistance is a growing problem that can be incredibly harmful to people with bacterial infections. When bacteria develop a resistance to modern drugs, doctors are left with fewer options for treating their patients. In some cases, bacteria become immune to all common antibiotics and these strains are a serious public health risk. Scientists have frequently studied the evolution of antibiotic resistance in an attempt to solve the problem.

Scientists from the University of Exeter utilized funding from the Engineering and Physical Sciences Research Council (EPSRC) to study how Escherichia coli bacteria develop resistance to antibiotics. The E.coli strain used in the study is harmful to humans, causing symptoms such as severe diarrhea and kidney failure. The team exposed the bacteria to doxycycline, one of the most common antibiotics for treating bacterial infections. The E.coli bacteria were exposed for four days while the researchers measured how quickly they developed mutations for doxycycline resistance. As expected, the bacteria quickly developed these types of mutations. However, the researchers noticed something that they didn’t expect; the bacteria containing the mutations were multiplying faster than non-mutated bacteria. They were reproducing so quickly that their population tripled within the four days of antibiotic exposure. This rapid evolution continued even after the researchers stopped dosing the population with the antibiotics.

The research team’s findings show that bacteria are capable of reproducing quickly when they gain antibiotic resistance mutations, even after they’re no longer exposed to the drug. Once they develop these mutations, they can focus their energy on reproduction instead of survival. The authors note that according to their findings, it’s important to begin antibiotic treatments immediately to avoid this rapid evolution.

REFERENCE

Reding-Roman et al. The unconstrained evolution of fast and efficient antibiotic-resistant bacterial genomes. Nature Ecology & Evolution (2017).


Source: http://naturalsciencenews.com/2017/01/30/bacteria-with-antibiotic-resistance-mutations-reproduce-faster-than-non-mutated-bacteria/


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Friday, May 8, 2026

How Seasonal Allergies Quietly Increase Household Spending

Seasonal allergies do not always look expensive at first. Many of the costs arrive in small pieces that seem harmless on their own: a box of tissues, a replacement filter, a skin care product, or another quick trip to the pharmacy. Over time, though, those small choices can turn a recurring symptom problem into a steady drain on the household budget. One reason this happens is that people tend to think about allergy spending one item at a time. Medication gets the most attention, but it is usually only one part of the picture. Extra laundry, additional cleaning supplies, eye drops, saline products, and even lost productivity from poor sleep can all add to the true cost of getting through a difficult season. A better approach is to look at the pattern across an entire month. When people write down what they buy during heavy symptom periods, they often notice repeated purchases that were made more out of frustration than strategy. That kind of review can help separate what is truly useful from what simply felt urgent in the moment. Medication prices still matter, of course, especially for products that may be used repeatedly. Someone researching zyrtec cetirizine price details should also think about whether the product fits the actual symptom pattern, how often it is needed, and whether it supports the person's normal routine. A lower price is not always a better value if the product leads to more trial and error later. Prevention can reduce cost as much as treatment. Lowering exposure to pollen, washing bedding consistently, and keeping outdoor irritants out of sleeping spaces may decrease how often extra products seem necessary. Planning ahead for known trigger periods is usually cheaper than reacting after symptoms escalate. There is also a point where continued spending signals the need for better information. If a household keeps buying new products without meaningful relief, professional guidance may provide more value than another round of guesswork. Spending smarter often starts with understanding the real cause of symptoms. People who want a more realistic view of symptom management can also review broader allergy resources on prevention and treatment choices. A little planning can reduce both the physical discomfort of allergies and the hidden costs that often come with them.

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