Culture media, staining techniques, and molecular diagnostic methods (PCR, serology) used to identify microorganisms, one technique per card.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What does the Gram stain differentiate bacteria based on?
Show answer
The thickness of their peptidoglycan cell wall layer.- What color do gram-positive bacteria appear after Gram staining?
Show answer
Purple (violet).- What color do gram-negative bacteria appear after Gram staining?
Show answer
Pink (red).- Which stain is used to identify Mycobacterium species?
Show answer
Ziehl-Neelsen (acid-fast) stain.- What cell wall component makes Mycobacterium resistant to acid decolorization?
Show answer
Mycolic acid.- What staining method uses fluorescence for rapid screening of acid-fast bacilli?
Show answer
Auramine-rhodamine stain.- Which stain visualizes the polysaccharide capsule of Cryptococcus neoformans?
Show answer
India ink stain.- Which stain is used to detect blood parasites like Plasmodium and Borrelia?
Show answer
Giemsa stain.- Which stain identifies Pneumocystis jirovecii cysts in lung tissue?
Show answer
Methenamine silver stain (GMS).- Which stain is used to diagnose Whipple disease?
Show answer
Periodic acid-Schiff (PAS) stain.- Which stain highlights fungal cell walls under fluorescence microscopy?
Show answer
Calcofluor white stain.- Which stool stain is used to identify ova and parasites?
Show answer
Trichrome stain.- What finding on a Tzanck smear suggests herpesvirus infection?
Show answer
Multinucleated giant cells.- What is MacConkey agar used to differentiate?
Show answer
Lactose-fermenting from non-lactose-fermenting gram-negative bacteria.- What color does E. coli produce on eosin methylene blue (EMB) agar?
Show answer
A green metallic sheen.
FlashKeepers