Flashcards in 8. Clinically Significant Yeasts Deck (35):
Causative agent of thrush
Indicator of immunosuppression
Most common cause of yeast infection
Germ tube result of Candida albicans
Germ tube positive
Sucrose reaction of C. albicans
Candida spp. that is sucrose negative
Second most common Candida spp.
Macroscopic: creamy, glabrous, with mycelial fringe colonies
Major cause of nosocomial infections; in indwelling catheters
Rarely isolated as a cause of endocarditis and vaginitis
Microscopic: pseudohyphae and elongated blastoconidia, branch-like trees
Most commonly found as fungemia
Torulopsis glabrata/Candida glabrata
The "working yeast"
Causative agent of meningitis and pulmonary disease
A major cause of opportunistic infection in patients with AIDS
Found in soil contaminated with pigeon excreta
Responsible for the mucoid appearance of colonies of Cryptococcus spp.
Stain for Cryptococcus spp. capsule
India ink (negative stain)
Today, India ink stain for Cryptococcus is being replaced with
Latex agglutination detects
Urease reaction of Cryptococcus spp.
Phenol oxidase reaction of C. neoformans
Phenol oxidase positive
Media used to detect phenol oxidase production
Caffeic acid agar
Bird seed agar
Closely related to Cryptococcus
Differentiating characteristic of Rhodotorula spp. from Cryptococcus spo.
Rhodotorula spp. are inositol negative
Urease reaction of T. beigelii
Seen in catheter-related infections in patients on long-term intravenous lipids
Most often recovered from environmental samples.
Microscopic: oval, elongated yeast cells, projectile spores
Causative agent of Pneumocystis pneumonia
Disease caused by Pneumocystis jiroveci
Commonly used stain for P. jiroveci
Appearance of P. jiroveci in GMS stain
Deflated ball appearance in GMS stain
Media used for culture of P. jiroveci