Agar Colors Flashcards
(20 cards)
Is C. Diff gram positive?
yes
C. diff Tx
Metro, Vanco, Fidaxo
C. diff etiology
ampicillin, clidamycin, cephalosporin
C. diff complication
Toxic megacolon
Campylobacter Tx
Erythromycin
Is Salmonella a lactose fermenter?
No
Is Salmonella gram positive?
NO
Can Salmonella use lactose?
No. Lactose neg
H2S producer
Salmonella
Cholera toxin is similar to
E.coli’s L toxin
Hektoen agar inhibits which grams?
gram positive
Hektoen differentiates which species?
Salmonella and Shigella
E.coli is lactose fermenter and is what color on Hektoen?
red
Shigella is H2S producer and what color on Hektoen?
black
Which one ferments lactose, salmonella or shigella?
neither
Hektoen differentiate shigella from salmonella based on which fermentation ability?
H2S production -salmonella
- turns black
Eosin Methylene Blue agar inhibits which grams?
Gram positives
What color is EHEC on MacConkey Sorbitol agar?
colorless
What color is a lactose fermenter on MacConkey agar?
pink
What color is lactose fermenter on Eosin Methylene Blue?
E.coli is metallic green, any other lactose fermenter will turn it dark purple or black
