Subcutaneous Mycoses

Question 1

Four major groups of subcutaneous fungal infections:

Answer 1

 Chromoblastomycosis
 Mycetoma
 Phaeohyphomycosis
 Sporotrichosis

Question 2

 Is caused by infection with dematiaceous fungi.

Answer 2

Chromoblastomycosis

Question 3

 Identification begins with a biopsy and histological exam. Of the lesions (cauliflower like lesion) for the presence of sclerotic bodies, which are copper-colored, septate cells present in

Answer 3

chromoblastomycosis.

Question 4

 The fungi associated with__________typically produce heaped, folded, and darkly pigmented (gray, olive, or black) colonies with a velvety black underside.

Answer 4

chromoblastomycosis

Question 5

 ______ is the species most common cause of chromoblastomycosis

Answer 5

Fonsecaea pedrosoi

Question 6

Different type of spores in Fonsecaea pedrosoi:

Answer 6

• Acrotheca, Cladosporium, Phialophora

Question 7

 _________ is another important species which rapidly grows producing olive-gray to black cottony or wooly colonies.

Answer 7

Phialophora verrucosa

Question 8

 Microscopically, ________ has septate hyphae with short conidiophores with flask-shaped phialides with collarette; oval to cylinder conidia form clusters at the ends of the phialides

Answer 8

Phialophora

Question 9

 The ___and ____ are described as resembling a vase with the conidial clusters resembling flowers.

Answer 9

phialides and collarettes

Question 10

Microscopic Morphology:
Conidiogenous cells, phaeoid, flask-shaped
phialides, with collarettes

Conidia oval, one celled, occur in balls at
tips of phialides

Answer 10

Phialophora verrucosa

Question 11

Microscopic morph:

Primary one-celled conidia formed on
sympodial conidiophores

Primary conidia function as conidiogenous
cells to form secondary one-celled conidia.

Answer 11

Fonsecaea pedrosoi

Question 12

Some conidia are similar to those seen in
Cladophialophora sp., some are similar to
those in Rhinocladiella sp., and some are
similar to those in Phialophora sp.

Answer 12

Fonsecaea pedrosoi

Question 13

Similar to F. pedrosoi but with more compact

conidial heads

Answer 13

Fonsecaea compactum

Question 14

Conidia are subglobose rather than ovoid

Answer 14

Fonsecaea compactum

Question 15

Erect conidiophores bearing branched chains
of one-celled, brown blastoconidia

Conidium close to tip of conidiophore,
termed shield cell

Answer 15

Claudophialaphora carrionii

Question 16

Conidiophores erect, dark, bearing conidia
only on upper portion near the tip

Conidia elliptic, one celled, produced
sympodially

Answer 16

Rhinocladiella aquaspersa