Myoclogy

Question 1

What are 3 classifications for fungi?

Answer 1

• Unicellular (yeasts)
• Filamentous (moulds)
• Dimorphic

Question 2

Features of unicellular fungi

Answer 2

• yeasts
• facultative anaerobes
• reproduce asexually by budding
• produce colonies on agar

Question 3

Features of filamentous fungi

Answer 3

• Moulds
• Aerobes
• reproduce by conidia (asexual spores)
• Produce mycelia on agar

Question 4

Dimorphic fungi

Answer 4

• these are best adapted to grow in our tissue bc they can grow as filamentous fungi when they are in the environment and grow as yeasts when they invade us, bc they can switch forms

Question 5

Dermatophytes

Answer 5

• Cause tinea

- Different species prefer diff host and tissues

Question 6

Subcutaneous mycoses

Answer 6

• mycetoma (maduromycosis)
• can be caused by bact or fungi
• treatment will be diff depending
• Fungi not susceptible to ABs
• fungal cause= madurella spp.

Question 7

Name examples of opportunistic mycoses?

Answer 7

• Candida albicans
• Cryptococcosis
• Apergillus spp.

Question 8

Cryptococcosis

Answer 8

• caused mainly by 2 agents:
  1) C. neoformans
  2) C. gatti

almost always inhaled- but often get very mild infection.

But if it spreads to body via blood can cause meningitis in inmmunocompromised people or in the case of C.gattii- even in someone who is immunocompetent

Types of Diseases:

• meningitis
• pulmonary infection

Antigen test is used a lot for this

Question 9

Apergillus spp.

Answer 9

• filamentous fungi
• can take on diff clinical forms:
  a) Saprophytic (fungus ball)
  b) Allergic
  c) Systemic