Your Microwave Hosts Radiation-Resistant Bacteria

Researchers from Spain have discovered a specialized community of highly adapted microbes residing in microwaves. Published in Frontiers in Microbiology, the study found that domestic microwaves exhibit a more 'anthropized' microbiome similar to kitchen surfaces, while laboratory microwaves contain bacteria that are more resistant to radiation. The research, conducted by sampling 30 microwaves from various environments, identified 747 different genera within 25 bacterial phyla. The most frequently encountered phyla were Firmicutes, Actinobacteria, and especially Proteobacteria.

The study suggests that these microbes, some of which are highly resistant to radiation, high temperatures, and desiccation, could have potential biotechnological applications, such as in bioremediation or the production of biofuels and chemicals. However, some strains found in domestic microwaves may pose health risks, including urinary tract infections and gastrointestinal issues. The researchers recommend regularly disinfecting microwaves with a diluted bleach solution or a commercially available disinfectant spray to mitigate any potential health risks.