Lab Final Flashcards
Which type of fungi has lots of macroconidia?
Microsporum
Which type of fungi has lots of microconidia?
Trichophyton
When do you use TSA agar?
General purpose
When do you use blood agar?
Fastidious organisms (need enriched media)
What diagnostic characteristic does blood agar let us utilize?
Hemolysis
When type of gram bacteria would you use MacConkey agar for?
G –
What diagnostic characteristic does MacConkey agar let us utilize?
Lactose fermentation
What aspects of MacConkey agar inhibit G+ bacteria?
Bile Salts, Crystal Violet
What aspect of MacConkey agar stain the lactose?
neutral red dye
Non lactose fermenters that grow on MacConkey utilize what nutrient?
Peptone
Lac- bacteria that grow on MacConkey?
Salmonella, Proteus, Pseudomonas, Shigella
Lac+ bacteria that grow on MacConkey? (just the three specifically addressed in lab)
E. coli, Enterobacter, Klebsiella
“Primary stain” of Gram Stain process?
Crystal Violet
“Mordant stain” of Gram Stain profess?
iodine
Decolorizer for gram staining?
Alcohol or acetone
“Counterstain” for gram staining?
Safranin/Fuschin
What does crystal violet stain for gram staining?
BOTH G- and G+
What does Safranin/Fuschin stain for gram staining?
G- ONLY (stains pink)
What is catalase used for?
Differentiate Staph from Strept
Is Staph or Strept Cat+?
Staph
What does oxidase test test for?
Cytochrome C Oxidase
What does catalase test for?
conversion of H202 into H20 and 02
Is pseudomonas or strept Ox+?
Pseudomonas
What agent is added for the motility test?
Tetrozolium salts
What are tetrazolium salts converted to by motile bacteria?
Formazan (red color)
What is the indicator for Urease test?
phenol red
What color is negative/positive for the urease test?
Yellow- NegativeRed- Positive
What antimicrobial susceptibility tests allow us to get an MIC?
E-test and Broth Microdilution
Disk diffusion antimicrobial susceptibility test?
Kirby-Bauer
Micro-ID test is used to differentiate which group of bacteria?
Enterobacteriaceae
What McFarland standard is used for antimicrobial susceptibility?
0.5
What is the colony forming units/mL for the 0.5 McFarland?
1.5x10^8
Which antimicrobial susceptibility test utilizes Mueller-Hinton?
Broth Microdilution
Competitive ELISA tests for what?
Antigen
Indirect ELISA tests for what?
Antibody
Sandwich ELISA tests for what?
Antigen
Which IFA test is brighter?
Indirect