Is there an incubation period for poisoning from eating wood ear mushrooms?
Nov 25, 2025
Source: Cainiu Health
Dr. Huang Yuhong
Introduction
Under normal circumstances, poisoning from consuming black fungus (wood ear mushroom) usually has an incubation period, the duration of which varies depending on factors such as the type of toxin, amount ingested, individual differences, and cooking methods. When rehydrating dried black fungus, use clean lukewarm water for no more than 2 hours; if room temperature is high, it can be refrigerated. Thoroughly wash and fully cook the fungus before consumption—avoid eating it raw or undercooked.
Generally, poisoning from consuming wood ear mushrooms (Auricularia auricula-judae) usually has an incubation period, the length of which varies depending on factors such as the type of toxin, amount ingested, individual differences, and cooking methods. A detailed analysis is as follows:
The incubation period for wood ear mushroom poisoning largely depends on the type of toxin and the quantity consumed. Improper soaking of dried wood ear mushrooms can promote the growth of Pseudomonas cocovenenans, which produces a toxin called bongkrekic acid. Symptoms typically appear only after this toxin accumulates to a certain dose in the body, and because it is slowly metabolized, illness usually develops several to dozens of hours after consumption. Fresh wood ear mushrooms contain porphyrin compounds that become toxic only after exposure to sunlight following ingestion, leading to a certain incubation period. The length of this period also varies with individual metabolic capacity—those with slower metabolism may experience delayed onset of symptoms.
To safely rehydrate wood ear mushrooms, use clean, warm water for no more than 2 hours; if room temperature is high, store them in the refrigerator during soaking. Thoroughly wash and cook the mushrooms before eating—never consume them raw or undercooked. If symptoms such as nausea or abdominal pain occur after consumption, stop eating immediately, induce vomiting, and seek medical attention promptly, informing healthcare providers about what was consumed. For daily storage, keep dried wood ear mushrooms in a dry, well-ventilated place to prevent moisture absorption. Avoid consuming mushrooms that have an unusual odor or abnormal texture. Including light, fresh vegetables and fruits in the diet can support the body’s detoxification and metabolic processes.
