Fungi Microbiology Exam Review Quiz

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Questions and Answers

What is the structure of yeasts?

Multicellular filaments
Unicellular spheres or ovals (correct)
Long hyphae with mycelium
Chains of spores

Where are most human pathogens located among fungi?

Multicellular fungi
Molds
Yeasts
Dimorphic (correct)

What predisposes someone to an opportunistic mycosis?

Geographical location, climate, gender, education level
Genetic factors, environmental factors, dietary factors, age
Vaccination history, exercise habits, blood type, occupation
Medical procedures, medical therapies, preexisting conditions, lifestyle factors (correct)

Why are fungal infections sometimes difficult to treat?

<p>Drug must attack them without attacking host tissue, which is also eukaryotic (C)</p> Signup and view all the answers

How are fungal spores different from bacterial spores?

<p>Fungal spores are airborne while bacteria spores are transmitted through air, water or contact with contaminated surfaces (C)</p> Signup and view all the answers

Flashcards

Yeast Structure

Single-celled fungi with spherical or oval shapes.

Location of most human fungal pathogens

Fungi that can exist in two forms, often as mold in the environment and as yeast in the body.

Predisposition to Opportunistic Mycosis

Medical procedures, Immunocompromising therapies, preexisting medical conditions, and certain lifestyle choices.

Difficulty of Treating Fungal Infections

Fungal and human cells are both eukaryotic, so drugs must selectively target fungal structures without harming human tissues.

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Fungal Spores vs. Bacterial Spores

Usually airborne. Bacterial spores are transmitted through air, water or contact with contaminated surfaces

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Study Notes

Yeast Structure

Yeasts are single-celled fungi
They reproduce by budding, where a small outgrowth forms on the parent cell and separates

Human Pathogens

Most human pathogens are located within the Ascomycota phylum
Ascomycota are known for their characteristic sac-like structures called asci

Opportunistic Mycosis

Opportunistic mycoses occur when fungi take advantage of a weakened immune system
Factors that predispose individuals include:
- HIV/AIDS
- Organ transplantation
- Cancer treatments
- Prolonged antibiotic therapy
- Diabetes

Fungal Infection Treatment

Fungal infections are sometimes difficult to treat due to:
- Fungi being eukaryotic organisms
- Antifungal drugs often target eukaryotic structures found in human cells as well

Fungal vs. Bacterial Spores

Bacterial spores are dormant, highly resistant structures that allow bacteria to survive harsh conditions.
Fungal spores, on the other hand, are reproductive structures, capable of germinating and producing new fungi.