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Kaplan Qbank USMLE



Author10 Posts
  #1

A 24-year-old woman in her third trimester of pregnancy presents with urinary frequency and burning for the past few days. She denies fever, nausea, vomiting, or chills. She takes no medications besides prenatal vitamins and is generally in good health. Physical examination is remarkable for mild suprapubic tenderness, and a urine dipstick is positive for white blood cells, protein, and a small amount of blood. Culture produces greater than 100,000 colonies of gram-negative bacilli.

Which of the following attributes of this uropathogenic organism is most strongly associated with its virulence?

A. Bundle-forming pili
B. GVVPQ fimbriae
C. Heat labile toxins
D. Heat stable toxins
E. P pili
F. Type 1 pili

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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #2

E ( ureaplasma urealyticum )

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I can't change the direction of the wind, but I can adjust my sails to always reach my destination.

  #3

Oops!!!!Sorry guys. Not ureaplasma but our good old E.Coli has P-pili

So my answer is still E and it is E.coli


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I can't change the direction of the wind, but I can adjust my sails to always reach my destination.

  #4

Anyone Else ??

___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #5

E

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Never underestimate the power of prayer.

  #6

NnL , I guess no one else is in a mood to try.

Please tell the right answer. Thanks.


___________________
I can't change the direction of the wind, but I can adjust my sails to always reach my destination.

  #7

I agree P pili - because its E.coli ( i have no idea what the other type of pili are). It needs this Pili to climb up into the kidney which it has, without it,the bact would be washed away in urine.

  #8

unique1 wrote:
NnL , I guess no one else is in a mood to try.

Please tell the right answer. Thanks.

gringringrin

___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #9

The correct answer is E.

Urinary tract infections are the most common bacterial infections encountered during pregnancy, and Escherichia coli is the most commonly isolated organism. 70% of cases in the U.S. are caused by P pili-positive strains.

Bundle-forming pili (choice A) are found in enteroaggregative E. coli (EAEC).

GVVPQ fimbriae (choice B) are found in EAEC.

Heat labile toxins (choice C) are pathogenic factors in enterotoxic strains (ETEC).

Heat stable toxins (choice D) are pathogenic factors in ETEC or EAEC.

Type 1 pili (choice F) are a major pathogenic factor in ETEC.


___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #10

E







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