Bacteria — Flashcards

Flashcard 741: _____ of High Frequency bacterial strains allows us to perform genetic mapping

Answer: Conjugation

Flashcard 742: Which gram-variable bacteria has a fishy odor?_____

Answer: Gardnerella vaginalis

Flashcard 743: Which form of E. coli presents with dysentery (bloody, mucousy diarrhea)?

Answer: Enteroinvasive E. coli (EIEC)

Extra: EIEC invades the intestinal mucosa (clinically similar to Shigella), leading to inflammation and necrosis. This presents as dysentery (fever, abdominal cramps, and blood/mucus in the stool). In contrast, Enterohemorrhagic E. coli (EHEC) causes hemorrhagic colitis (bloody diarrhea) via Shiga-like toxin but does not invade the mucosa, so it typically lacks fever and mucus/leukocytes in the stool.

Flashcard 744: During the _____ phase of bacterial growth, there is no increase in number of cells since you added them to the culture

Answer: lag

Flashcard 745: IgA protease is a virulence factor used by Neisseria that allows bacteria to colonize and adhere to _____.

Answer: mucous membranes

Flashcard 746: What proteins cross-link peptidoglycan on bacterial cell walls?_____

Answer: Penicillin binding protein transpeptidases (PBPs)

Flashcard 747: What is the etiology of Lyme Disease?_____

Answer: Borrelia burgdorferi

Flashcard 748: _____ is normal flora of the skin and thus can contaminate blood cultures.

Answer: Staph epidermidis

Flashcard 749: What bacteria releases a toxin that cleaves SNARE proteins in Renshaw cells? _____

Answer: Clostridium tetani

Flashcard 750: Asplenia can result in an increased risk of sepsis from _____ bacteria due to loss of splenic phagocytes

Answer: encapsulated