Infectious Diseases Overview

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Questions and Answers

What is the role of EAEC pili (AAF) in adherence?

  • Mediate A/E lesions on the intestinal mucosa
  • Prevent adherence to the intestinal mucosa
  • Cause mild adherence to the intestinal mucosa
  • Mediate tight adherence to the intestinal mucosa (correct)

How is E coli typically diagnosed in culture according to the text?

  • Blood agar culture
  • MacConkey agar culture (correct)
  • Sabouraud agar culture
  • Chocolate agar culture

What is a disadvantage of using immunoassay and nucleic acid amplification methods for diagnosing intestinal diseases?

  • Low cost
  • Limited positive predictive value due to positive results in healthy persons (correct)
  • Easy availability
  • High sensitivity and specificity

What is the recommended treatment for acute uncomplicated UTIs due to widespread resistance to earlier agents?

<p>Bactrim (TMP-SMX) and fluoroquinolones (A)</p> Signup and view all the answers

What is usually the treatment approach for most cases of E coli diarrheas?

<p>Rehydration and supportive measures (B)</p> Signup and view all the answers

Which E coli infection can be treated with TMP-SMX or fluoroquinolones to reduce the duration of diarrhea?

<p>ETEC, EIEC, and EPEC infection (D)</p> Signup and view all the answers

What makes sorbitol fermentation useful in detecting EHEC?

<p>Detects the most common EHEC serotype (C)</p> Signup and view all the answers

What do immunoassay and nucleic acid amplification methods aim to detect?

<p>Toxins (LT, ST, Stx) or genes associated with virulence (B)</p> Signup and view all the answers

Which type of antibiotic should be selected based on antimicrobial susceptibility testing of the patient’s isolate?

<p>The antibiotic with the highest resistance rate in the community (A)</p> Signup and view all the answers

In what type of UTI are Bactrim (TMP-SMX) and fluoroquinolones commonly used due to resistance?

<p>Uncomplicated UTIs (C)</p> Signup and view all the answers

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