Candida,Cryptococcus,Geotrichum, Trichosporon, Rhodotorula
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| What significance would a scant/light growth of yeast have if grown from a culture? | Generally normal flora or a "colonizer" if grown in small amount and is considered non-pathogenic.
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| What other organism can be confused with a culture of yeast on a BAP? How would you differentiate the two? | Young yeast colonies (mainly Candida glabrata) grow in very small pin-point colonies and can easily be confused with Lactobacillus. To quickly differentiate the two you could perform a gram stain to observe morphology or a wet mount.
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| Most yeasts grow well at what temperature? What species would be an exception? | Most grow well between 30-37 C
- C. krusei - 42C
- Geotrichum - 25C
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| What can be used to presumptively identify certain yeast species? | Colony morphology on ChromAgar - most species have distinct pigmentation that can be used to identify:
- C. albicans - green
- C. glabrata - mauve
- C. krusei - rose-pink, spready
- C. tropicalis - blue, sometimes metallic
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| What does Geotrichum look like on a gram stain? | - Has true hyphae that almost look like GPR
- Looks similar to Clostridium perfringens when stained
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