A new study in Frontiers in Microbiology has uncovered more than 100 different bacteria living inside microwave ovens found in kitchens, labs, and cafeterias.
Researchers swabbed the interiors of 30 microwave ovens and cultured the samples, revealing a diverse bacterial community.
The study, led by microbiologist, Manuel Porcar from the University of Valencia, identified bacteria from common groups like Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes.
Some strains, such as Klebsiella and Brevundimonas, are known to cause foodborne illness.
Despite this, Porcar notes that these findings are not cause for alarm: “The microorganisms found in microwave ovens are similar to those on kitchen surfaces. There is no greater risk here than with any other kitchen equipment.”
This research is the first of its kind to document bacterial communities in microwave ovens.
The study highlights the importance of regular cleaning but reassures that the risk from these bacteria is similar to other kitchen areas.
