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Kaplan Qbank USMLE



Author6 Posts
  #1

6. A 50-year-old man who recently immigrated to the USA from Russia develops fever, swelling of the neck, and difficulty swallowing. His vaccination history is uncertain. Examination of the throat shows a gray membrane across the pharynx. The pathogen responsible for this infection most likely acquires its virulence through which of the following genetic events?



A) Acquisition of a transposon



B) Chromosomal mutation



C) Conjugation



D) Recombination
E) Transduction



D or C??

Corynebacterium diptheriae pseudomembrane, correct?


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Our greatest glory is not in never falling, but in rising every time we fall.

  #2

thats E DrVirgo
remember the bacteriophages in lysogenic conversion
O Salmonella toxin
B otulinum Toxin
E rytrogenic toxin of strep pyo
D iphteria toxin!!

  #3

Thanks for explanation, I review them, I read them but do not understand, now I got.


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  #4

You are right r_al. This is lysogenic conversion, so the bacteria will acquire new bacteria from a phage and not undergo lysis but will become a new phenotype.
OBED... Yes... thanks for reminding me! smiling face


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Our greatest glory is not in never falling, but in rising every time we fall.

  #5

O is for O Antigen of Salmonella (not toxin)...

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Our greatest glory is not in never falling, but in rising every time we fall.

  #6

Chioce E

Thanks







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