Can Aspergillus flavus spread into the air?

Dec 12, 2025 Source: Cainiu Health
Dr. Li Feng
Introduction
Under normal circumstances, Aspergillus flavus can spread through airborne spores. In daily care, it is important to keep the environment dry and well-ventilated, frequently open windows for ventilation to reduce indoor humidity, and minimize conditions favorable for the growth of Aspergillus flavus spores. Store grains, nuts, and other foods in sealed, moisture-proof containers to prevent dampness and mold. Promptly dispose of any items showing signs of mold.

Under normal circumstances, Aspergillus flavus can spread through airborne spores. The detailed explanation is as follows:

 

Aspergillus flavus is a type of fungal microorganism. During its growth and reproduction, it produces numerous microscopic spores. These spores are lightweight and can remain suspended in the air, allowing them to be carried by air currents and thus spread through the air. When environmental conditions such as temperature and humidity are favorable, Aspergillus flavus proliferates extensively on moldy grains, nuts, damp wooden materials, or wall surfaces. Mature spores detach from the mycelium and disperse into surrounding areas via everyday air movement—sometimes traveling considerable distances. Upon landing on a suitable new substrate, these spores may germinate and grow again, causing new contamination.

To prevent this, daily precautions should include maintaining a dry and well-ventilated environment. Regularly opening windows for ventilation helps reduce indoor humidity and limits conditions favorable for spore growth. Store food items such as grains and nuts in sealed, moisture-proof containers to prevent dampness and mold. Promptly dispose of any items showing signs of mold, wearing a mask during cleanup to minimize direct inhalation of spores. Regularly clean household corners to prevent hidden mold buildup. Observing these details effectively reduces the spread and accumulation of Aspergillus flavus spores, thereby lowering the risk of exposure and contamination.

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