Dark spots on the skin are a natural indication of a banana's ripening - a result of an enzymatic process that breaks down chlorophyll, leading to the appearance of antioxidants.
The color alterations not only impact how sweet the fruit becomes, but they also boost its nutritional value. However, it's vital to pay attention to the fruit's texture. If a banana is tender but not overly mushy, it is safe for consumption.
If the banana has a foul odor, is excessively soft, showcases mold on its skin, or has cloudy or sticky pulp, it is likely spoiled and should not be eaten. It's always better to err on the side of caution and avoid consuming fruit of questionable quality.
Nigrospora fungus - a hidden menace A specific type of fungus known as microspore can pose issues. This naturally occurring fungus is responsible for the dark spots on the fruit's skin.
Strong immune systems can tolerate microspore fungal infections. The fungus can cause respiratory issues and other issues in people with compromised immune systems. Even though such occurrences are rare, knowing about the risk is beneficial.
One issue concerning the fungus is that it's often hard to detect, and its infection symptoms, which include fever and digestive troubles, can easily be mistaken for other illnesses or types of intoxication.
The reddening of the seeds inside the fruit indicates the fungus's presence within a banana. So, before eating a banana that's been sitting in your kitchen for a while, it's prudent to slice it open to check for any red filaments inside.