Review Fungus, Protozoa, Worms

Question 1

Three categories of fungi

Answer 1

Yeast
Mould
Dimorphic

Question 2

Morphology and types of yeast

Answer 2

Round/oval; bud
Single cell

Candida spp. (C. albicans – germ-tube/pseudohyphae)
Cryptococcus neoformans
Pneumocystis

Question 3

Morphology and types of moulds

Answer 3

Multicellular
True hyphae

Aspergillus spp. aka Hyaline (45° branching septate hyphae)
Mucormycosis (non-septate) (Alternaria [dark]; Pseudallescheria boydii)
Dermatophytes
Dematiaceous

Question 4

Morphology and types of Dimorphic

Answer 4

Different in environment vs body (25° mould/37° yeast)

Histoplasma capsulatum 
Blastomyces dermatididis 
Coccidioides immitis; 
Sporotrichosis
Paracoccidioides brasiliensis

Question 5

What spp are found in order Mucorales, and when should they be suspected?

Answer 5

Rhizopus spp
Rhizomucor spp
Mucor spp

Diabetes mellitus, espc. DKA
Glucocorticoids

Hematologic malignancies
Stem cell transplant
Solid organ transplant
Late HIV

Treatment with deferoxamine
Iron overload

Injection drug use
Trauma/burns
Malnutrition