Saprophytic Molds Flashcards
considered clinical contaminants
saprophytic molds
dematiaceous
darkly pigmented on top and bottom
what species do you need to be careful working with because spores will fly everywhere and contaminant surfaces
aspergillus species
all aspergillus species have what hyphae
septate
3 characteristics of aspergillus species
- Very long conidiophores that arise off of septate hyphae
- Conidiophores will open up into what is called a vesicle
- Coming off the vesicle is a secondary supporting structure known as phialide; off these will come the conidia
what else may be present at bottom of aspergillus?
foot cell
what is a foot cell
point where the conidiophore attached to the hyphae
what is most common aspergillus?
fumigatus
what is seen on bread, fruits, in the air, in soil, and very commonly seen in nature?
Aspergillus fumigatus
-everyone is exposed to this
-can also be very invasive
how is Aspergillus fumigatus differentiated from other ones in the species?
fumigatus can grow at 42 degrees
-greenish
describe Aspergillus fumigatus phialides?
covering upper 2/3 of vesicles and pointing in upward fashion
Aspergillus niger color
black but not dematiaceous because bottom is white
describe Aspergillus niger philades
all the way around the vesicles
conidia are darkly pigmented
Aspergillus flavus infection
causes pulmonary infections locally and systemic
can produce aflatoxins and is deadly if ingested in large amounts
-common contaminant so be careful eating food
Aspergillus flavus color
top= yellow, green, or browish
reverse= yellowish to brown-red
