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Seagull Sentinels

Risk of human infection by drug-resistant bacteria from seagulls

12 March 2021

Seagull Sentinels

Antibiotic resistance in bacteria is one of the key medical challenges of this century, and monitoring bacterial populations in the wild demonstrates the scope of the problem. Species in close contact with humans, like gulls, known for scavenging our leftovers at the seaside, are likely to share our bacteria, including antibiotic-resistant strains. Following evidence of antibiotic-resistant Escherichia coli in Australian silver gulls, a recent study on yellow-legged and Audouin’s gulls in the Mediterranean also found resistant strains of Campylobacter jejuni and Salmonella Typhimurium (pictured, in red, invading a human cell). Common causes of diarrhoea, these latter bacteria are transmitted mainly through contaminated food and domestic animals. Finding them in multiple gull species highlights both the potential risk for transmission and the extent of contamination from human and agricultural waste, so gulls could serve as useful sentinel species, providing an indicator of the prevalence of antibiotic resistance in the environment.

Written by Emmanuelle Briolat

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BPoD stands for Biomedical Picture of the Day. Managed by the MRC Laboratory of Medical Sciences until Jul 2023, it is now run independently by a dedicated team of scientists and writers. The website aims to engage everyone, young and old, in the wonders of biology, and its influence on medicine. The ever-growing archive of more than 4000 research images documents over a decade of progress. Explore the collection and see what you discover. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.

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