Bacteria — Flashcards

Flashcard 791: Why doesn't Rickettsia spp. gram stain well?_____

Answer: Obligate Intracellular bacteria

Flashcard 792: The flaccid paralysis in Clostridium botulinum is a _____ paralysis (ascending or descending)

Answer: descending

Flashcard 793: _____ mRNA can be polycistronic, meaning one mRNA codes for several proteins

Answer: bacterial

Flashcard 794: Which form of E. coli presents with watery diarrhea?_____

Answer: Enterotoxigenic E. coli (ETEC)

Flashcard 795: _____ is the transfer of random DNA between bacteria using bacteriophages

Answer: Generalized transduction

Flashcard 796: Is *Leptospira interrogans* visible on Gram stain?

Answer: No

Extra: *Leptospira* (like most spirochetes) is too thin to be visualized by light microscopy or standard Gram staining. It is visualized using **dark-field microscopy** or **silver stains** (e.g., Warthin-Starry stain).

Flashcard 797: Conjugation of normal bacteria involves transfer of _____ only

Answer: plasmids

Flashcard 798: The incubation period for Rickettsia rickettsii is somewhere between _____ days

Answer: 2-14

Flashcard 799: Shigella is acid-_____ (stable or labile)

Answer: stable

Flashcard 800: What exotoxin is secreted by Vibrio Cholera?_____

Answer: Cholera toxin