A Phase 3 clinical trial enrolled 840 children aged 18 to 59 months who came to eight pediatric emergency departments with wheezing. Children were randomly assigned to receive azithromycin or a placebo for five days, and researchers tracked symptoms with the Asthma Flare-up Diary for Young Children (ADYC), a parent-report tool for breathing, coughing, appetite and mood.
Investigators found no improvement in ADYC scores for children given azithromycin, and the trial was stopped early after an interim analysis. Many children carried respiratory bacteria in the nasopharynx; 521 of the 840 tested positive for at least one potentially harmful species. Most children also had respiratory viruses, and 72.5% were infected with a cold virus.
Lead researcher Fernando Martinez said clinicians should not give azithromycin or any antibiotic for severe wheezing episodes. The study raises concerns about antibiotic overuse, drug resistance and effects on immune development.
Difficult words
- azithromycin — an antibiotic drug used to treat bacterial infections
- wheeze — a noisy breathing sound when someone breatheswheezing
- placebo — a fake medicine used to compare treatments
- interim analysis — a quick study check before a trial finishes
- nasopharynx — the upper part of the throat behind the nose
- clinician — a doctor or healthcare professional who treats patientsclinicians
- antibiotic — a medicine that kills or stops bacteria growth
- resistance — ability of bacteria to survive antibiotic treatment
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Why do you think many children still had viruses even when bacteria were present?
- How could concerns about antibiotic resistance affect decisions in an emergency department?
- If a child has wheezing, what information would you want before giving medicine?
Related articles
Vitamin D may slow diabetes for some people
A new analysis of a large US trial suggests vitamin D supplements might delay progression from prediabetes to type 2 diabetes for people with certain vitamin D receptor gene variations. Researchers warn against taking high doses without medical advice.
Wastewater surveillance reveals antibiotic resistance across Indian cities
A study of sewage from four Indian cities found many antibiotic resistance genes and similar resistance patterns. The 2025 National Action Plan and experts promote wider wastewater surveillance, but critics warn of weak implementation.
