Articles on Antibiotic resistance

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Penicillin is a substance produced by penicillium mold. About 80% of people with a penicillin allergy will lose the allergy after about 10 years. Clouds Hill Imaging Ltd./Corbis Documentary via Getty Images

Are you really allergic to penicillin? A pharmacist explains why there’s a good chance you’re not − and how you can find out for sure

As many as 1 in 5 Americans believe they have a penicillin allergy, but just a tiny fraction actually do. In recent years, it’s gotten a lot easier to find out.
Warning signage for suspected cases of measles is seen outside the main entrance of Woodstock General Hospital in Woodstock, Ont., on May 22, 2025. THE CANADIAN PRESS/Nicole Osborne

How falling vaccination rates are fuelling the antibiotic resistance crisis

Measles is a viral infection, so antibiotics don’t treat it directly. But it weakens the immune system, leading to bacterial infections like pneumonia or ear infections, which do require antibiotics.
Current methods of identifying resistance mutations in microbes can miss other ways resistance can develop. koto_feja/iStock via Getty Images Plus

Fighting antibiotic resistance at the source – using machine learning to identify bacterial resistance genes and the drugs to block them

By analyzing the resistance genes and proteins of E. coli, researchers can optimize treatments to address both current and future antimicrobial resistance.
Genetic analysis of the bacteria causing surgical site infections revealed that many were already present on the patient’s skin. Ruben Bonilla Gonzalo/Moment via Getty Images

Infections after surgery are more likely due to bacteria already on your skin than from microbes in the hospital − new research

Most infection prevention guidelines center on the hospital environment rather than the patient. But the source of antibiotic-resistant microbes is often from the patient’s own body.
While antimicrobial resistance is a threat to all humanity, a tale of two worlds emerges, highlighting the heightened vulnerability of low- and middle-income countries. (Shutterstock)

Antimicrobial resistance now hits lower‑income countries the hardest, but superbugs are a global threat we must all fight

The contrasting realities of antimicrobial resistance between high-income countries and low- and middle-income countries demands international co-operation to effectively fight superbugs.

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