Fungi Flashcards
1
Q
Dematiaceous
A
Dark colored
2
Q
Agent of ringworms
A
Trichophyton Microsporum
3
Q
Dimorphic fungi
30 degrees- yeast
25 degrees- mould
A
Blastomyces
Histoplasma
Coccidioides
Sporothrix
Paracoccidioides
4
Q
Hyaline
A
Clear
5
Q
Septate hyphae
A
Cross walls with fairly regular width
6
Q
Nonseptate hyphae
A
No cross walls, broad hyphae with irregular width, broad branching angle
7
Q
Conidia
A
Asexual spores formed off of hyphae, airborne
8
Q
Blastoconidia
A
Buds on yeast ( asexual budding daughter yeast cells)
9
Q
Arthroconidia
A
Asexual spores formed by a joint
10
Q
Spherules and endospores
A
Spores inside spherules in tissues, common to Coccidioides
11
Q
Culture media for recovering fungi
A
- Sabouraud agar
- blood agar
- both of these with antibiotics
12
Q
- Caused by malassezia furfur
- Superficial infection of keratinized cells
- Likes warm, moist climates
- Hypopigmented spots on chest/back
- KOH mount shows spaghetti and meatball appearance
- Yeast clusters with short curved septate hyphae
- Coppery- orange under woods lamp
- Treat with topical selenium sulfide
- Causes fungemia in premature infants on I’ve lipid supplements
- Inhibits pigment production by interfering with tyrosinases
A
Tinea versicolor or pityriasis
13
Q
Agent of Black piedra
A
Piedra horti Rare in US, more in tropical areas
14
Q
- Infection of hair shafts
- Hard black nodules along shaft that weaken hair
- Broken hair shaft may resemble Tinea capitis
- Tx: haircut and topical salicylic acid, oral terbinafine or clotrimazole
- Caused by piedra hortai
A
Black piedra
15
Q
Agent of white piedra
A
- Trichsporon beigelii
- Seen in semitropics, southern US
