Mycetismus is caused by _______.
a. inhalation of fungal allergens
b. ingestion of mushrooms
c. traumatic inoculation of fungi beneath the skin
d. close contact with infected individuals

Verified step by step guidance

1. Step 1: Understand the term 'Mycetismus'. It refers to a type of poisoning caused by the consumption of certain toxic mushrooms.
2. Step 2: Analyze each option in the context of Mycetismus: (a) inhalation of fungal allergens typically causes allergic reactions, not poisoning; (b) ingestion of mushrooms can lead to poisoning if the mushrooms are toxic; (c) traumatic inoculation of fungi beneath the skin usually causes localized infections, not systemic poisoning; (d) close contact with infected individuals is related to contagious infections, not poisoning.
3. Step 3: Recognize that Mycetismus specifically involves the ingestion of toxic mushrooms, leading to poisoning symptoms.
4. Step 4: Conclude that the correct cause of Mycetismus is the ingestion of mushrooms, particularly toxic ones.
5. Step 5: Remember that Mycetismus is a form of mushroom poisoning, which is important in clinical microbiology and toxicology.

Key Concepts

Mycetismus

Mycetismus refers to poisoning caused by the ingestion of toxic mushrooms. It involves the absorption of fungal toxins that can affect various organs, often leading to severe symptoms or even death if untreated.

Fungal Allergens and Inhalation

Inhalation of fungal allergens typically causes allergic reactions or respiratory issues, such as asthma or hypersensitivity pneumonitis, rather than poisoning. This concept helps differentiate allergic responses from toxic ingestion.

Modes of Fungal Infection and Exposure

Fungal infections can occur through traumatic inoculation (skin injury), inhalation, or contact with infected individuals. Understanding these modes clarifies that mycetismus is not caused by infection but by toxin ingestion.