Fungi Profiles

Question 1

Ringworm (Tinea)

• Layer infected
• Organsims typically responsible
• morphology
• Reservoirs

Answer 1

CUTANEOUS
- only infect keritinized structures skin, hair, or nails

Suspect Organisms

• Epidermophyton
• Microsporum
• Trichophyton

ALWAYS MOLDS

DOGS and CATS = Reservoir

Question 2

How do we characterize different ringworms? why is this?

Answer 2

We characterize them by where they occur because a single tinea (ringworm) may contain many different species of fungi

Question 3

What tool can we use to quickly dertermine if an infection is caused by a fungi or bacteria?

Answer 3

UV lamp (aka Wood Lamp) - many fungi fluoresce under this type of light

Question 4

What do you call ringworm on the head?

- arm?

Answer 4

Head - Tinea Capitis

Arm - Tinea Corpris

Question 5

Sprotrichosis

• Layer infected
• Organsims typically responsible
• morphology
• Reservoirs
• Diagnostic Characteristic

Answer 5

Layer Infected: 
Subcutaneous Mycoses (Dermis or Bone)

Organism:
Sporothrix Schenckii

Morphology:
- Dimorphic Fungus

Reservoirs:
- Soil or Vegetation (roses)

Dx:
Roset Canida under microscope

**Often occurs at the site of trauma

Question 6

What are the two forms of Sprotrichosis?

Answer 6

Fixed

Lymphocutaneous

Question 7

Histoplasmosis

• Layer infected
• Organsims typically responsible
• morphology
• Reservoirs
• Diagnostic Characteristics

Answer 7

Layer:
- Systemic

Organism:
- Capsulatum Conidia

Morphololgy:
- Dimorphic (converts to yeast form in host)

Reservoirs:
- Bat or Bird Excrement

Diagnosistic Characteristic:
- Intracellular Yeast that Replicates inside of Macrophages