Microbiologist warns black mould in lunchbox seals poses serious health hazards

Dubai microbiologist Neethu Sureshkumar warned global consumers that dark fungal accumulations developing underneath container coverings present significant biological hazards. The dark spots commonly found beneath the rubber seals of food storage containers represent hidden mould growth. These living organisms thrive in warm, damp environments by feeding on trapped moisture and microscopic food debris. The resulting contamination presents severe physical threats to vulnerable groups, including young children, older adults, and individuals possessing weakened immune systems.

An Instagram broadcast published on July 8, 2026, highlighted how these unaddressed fungi compromise daily food safety. HT.com reported that Sureshkumar urged the public not to ignore visible dark blemishes inside their food and beverage gear. Sureshkumar explained that continuing to utilise contaminated items without proper sanitisation allows mobile reproductive particles to shift directly onto fresh provisions. Swallowing the affected provisions subsequently triggers digestive distress, respiratory sensitivities, or additional clinical complications.

Sanitation and Prevention

To maintain proper food safety, Sureshkumar directed consumers to routinely disinfect all flexible components with boiling water or soapy water. The sanitation routine requires individuals to extract the flexible seal frequently, cleanse it thoroughly, and ensure it dehydrates completely prior to rebuilding the container assembly. Sustaining a completely dehydrated storage space by keeping the container stored slightly unsealed operates as a vital final phase to obstruct subsequent biological contamination.

The expert recommended the following steps for thorough cleaning:

• Remove the rubber gasket regularly.
• Wash it with hot, soapy water.
• Dry it completely before putting it back.
• Store your lunchbox with the lid slightly open.

Component Replacement

Sureshkumar observed that if dark blemishes remain visible after vigorous brushing, owners must substitute the flexible components or the complete covering immediately to halt the propagation of damaging particles. The professional asserted that maintaining an unblemished storage system ensures safer nourishment consumption.

Note: This article is based on user-generated content from social media, and the claims have not been independently verified. It is for informational purposes only and is not a substitute for professional medical advice. Readers should consult a doctor with any questions about a medical condition.