Listeria Monocytogenes

Welcome to this week’s spotlight! Get ready to meet Listeria monocytogenes, a bacterium that’s as fascinating as it is formidable. This week, we’re showcasing this resilient microorganism known for its ability to survive in challenging environments, making it a major concern in food safety. Listeria isn’t just another bacterium—it’s a master of adaptation, often found lurking in foods where you’d least expect it. Dive in to discover what makes Listeria monocytogenes a key player in microbiology and why understanding its behaviour is crucial for public health.

Electron micrograph of a Listeria bacterium in tissue Photographed by Elizabeth White

What is Listeria Monocytogenes?

Listeria monocytogenes, a hidden threat in everyday foods, mainly targets pregnant women, newborns and the elderly, individuals. Found lurking in soil, water, and contaminated foods like unpasteurized dairy, raw vegetables, and ready-to-eat meats, it can lead to serious infections such as meningitis. Under a microscope, this bacterium appears as small rods, deceptively simple in appearance yet dangerously potent.

This is a photomicrograph of a tissue sample harvested from a papular cutaneous lesion, on the skin of a neonate, who had been infected with Listeria monocytogenes, and which revealed masses of the bacterial organisms. Photographed by Charles N. Farmer

To protect yourself and your loved ones, cook meat thoroughly, avoid unpasteurized dairy, wash produce diligently, and maintain impeccable food hygiene.

You can find the original images on this story through this link

Thanks for joining us on this microscopic journey into the world of Listeria monocytogenes. We hope you found this week’s feature as intriguing as we did. Don’t forget to check back next week for another captivating look into the unseen world around us. Until then, stay curious and keep exploring!

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