Despite the fact that microwave ovens are found in 90% of U.S. households, a concerning one in three Americans neglect to clean them weekly as recommended.

A recent study led by Alba Iglesias at the University of Valencia discovered a staggering 747 different genera of bacteria from 30 sampled microwaves.

Researchers employed next-generation sequencing and cultivation techniques to identify these bacteria, which spanned 25 bacterial phyla, with Firmicutes, Actinobacteria, and Proteobacteria being the most prevalent.

Belinda Ferrari from the University of New South Wales emphasizes the importance of regular cleaning, supporting the study's findings on the adaptability of bacteria to various environments.

Co-author Daniel Torrent advises that promptly cleaning any spills and regularly sanitizing the microwave can help maintain hygiene.

The study found that while microwaves are not sterile, they are not significant reservoirs of pathogens, although they can harbor nearly 750 different species of bacteria, some of which may pose health risks.

Among the identified bacterial strains, 101 were specifically noted, with dominant genera including Bacillus, Micrococcus, and Staphylococcus, which are commonly found on human skin.

Notably, Klebsiella, a bacterium typically found in human feces, can cause serious infections and is increasingly becoming antibiotic-resistant.

Porcar also stresses that regular cleaning is essential, as microwaves do not eliminate microbial contamination on their own.

Experts recommend disinfecting microwaves with diluted bleach or disinfectant spray and cleaning surfaces after each use to minimize bacterial growth.

The research suggests that these resilient microorganisms could have potential applications in cleaning up toxic waste, highlighting their adaptability.

Further research is needed to explore the adaptations of these strains and their potential applications in industrial processes or as biocatalysts.