Tremella, also known as silver ear fungus, is a traditional and nutritious delicacy. However, once it spoils, it becomes unsafe to consume. The primary harmful bacteria found in spoiled Tremella is *Flavobacterium zephyricum*, which currently has no effective medical treatment. Therefore, it's crucial to be able to identify whether the Tremella you're about to eat is still safe.
**Visual Inspection**: Spoiled Tremella often turns dark yellow or brown. Its flower-like structure may appear incomplete, with visible residue or dirt. The base of the mushroom might not be clean, and there could be dark spots or foreign materials present. If the white fungus appears yellow, it might simply be due to drying after rain or humidity, but this won’t affect its nutritional value—though it may lower its market appeal.
**Touch Test**: Fresh Tremella should feel dry and crisp. If it feels damp or wet to the touch, it may have started to spoil.
**Smell and Taste**: When exposed to moisture, healthy Tremella remains fresh. However, if it starts to mold or spoil, it will emit a sour or foul odor. The taste may become spicy or bitter, indicating deterioration.
**Water Test**: When soaked in warm water, good-quality Tremella should expand quickly by 5 to 10 times its original size. If it doesn't swell much, it may have already spoiled. Additionally, if the pieces break apart easily or become overly sticky after soaking, this is another sign that the Tremella is no longer safe to eat.
By carefully checking these characteristics, you can better ensure that the Tremella you consume is both safe and of high quality. Always store it properly in a cool, dry place to prevent spoilage.
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