Gram-negative — Flashcards

Flashcard 51: Give examples of G- spirochetes.

Answer: Leptospira, Borrelia, Treponema

Flashcard 52: Give examples of G- pleomorphic bacteria.

Answer: Rickettsiae, Chlamydiae

Flashcard 53: Give examples of G- bacilli.

Answer: MANY; if in doubt, guess G- rod

Flashcard 54: Give examples of G- cocci.

Answer: Neisseria

Flashcard 55: Which cellular structures are unique to G- bacteria?

Answer: outer membrane, LPS, periplasm

Flashcard 56: periplasm

Answer: space between cytoplasmic membrane and outer membrane in G- bacteria

Extra: many hydrolytic enzymes, notably β-lactamase

Flashcard 57: outer membrane in G-

Answer: major surface antigen

Extra: LPS

Flashcard 58: Which curved gram negative rod is invasive and can thus cause bacteremia? _____

Answer: Campylobacter jejuni

Extra:   Watch Campylobacter jejuni [https://dashboard.sketchy.com/study/medical/courses/medical-microbiology/units/medical-microbiology-bacteria/videos/medical-microbiology-bacteria-gram-negative-bacilli-enteric-tract-campylobacter-jejuni?utm_source=anki&utm_medium=partnership&utm_campaign=february_update&utm_content=medical] https://onlinemeded.org?ref=anki 

Flashcard 59: Shigella forms _____ colonies on Hektoen agar

Answer: green

Extra:   Watch Shigella spp. [https://dashboard.sketchy.com/study/medical/courses/medical-microbiology/units/medical-microbiology-bacteria/videos/medical-microbiology-bacteria-gram-negative-bacilli-enteric-tract-shigella-spp?utm_source=anki&utm_medium=partnership&utm_campaign=february_update&utm_content=medical] https://onlinemeded.org/spa/infectious-disease?ref=anki 

Flashcard 60: _____ activates guanylyl cyclase in the gut, thereby increasing cGMP secretion

Answer: Heat stable toxin

Extra:  https://onlinemeded.org/spa/infectious-disease?ref=anki