Gram-negative — Flashcards

Flashcard 101: What is the gram stain of Brucella? _____

Answer: Gram negative

Flashcard 102: Moraxella catarrhalis are gram _____ _____

Answer: negative

Flashcard 103: Gram Negative Algorithm: Bacilli who are not lactose fermenters and are Oxidase _____ are further split based on H2S production on TSI agar

Answer: Negative

Flashcard 104: Is Vibrio cholerae motile? _____

Answer: Yes

Flashcard 105: Shigella secretes effector proteins via a(n) _____ secretion system

Answer: type III

Flashcard 106: Which part of Lipopolysaccharide is a target for antibodies? _____

Answer: O antigen

Flashcard 107: What color pigment is associated with Pseudomonas aeruginosa? _____

Answer: Blue-green

Flashcard 108: Bordetella pertussis is a gram _____ coccobacillus

Answer: negative

Flashcard 109: _____ is a component of gram negative bacteria cell walls

Answer: Endotoxin

Flashcard 110: Which agar detects the production of hydrogen sulfide (H2S)? _____

Answer: Hektoen agar

Extra: Hektoen enteric (HE) agar is used to differentiate Salmonella and Shigella species. - Salmonella: H2S (+) → Black colonies - Shigella: H2S (-) → Green/colorless colonies