Escherichia coli (E.coli) Characteristics Quiz
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Questions and Answers

Which bacterial genus does the text primarily focus on?

  • Salmonella
  • Escherichia (correct)
  • Staphylococcus
  • Clostridium

What is the main virulence factor associated with E.coli?

  • Capsular K antigen (correct)
  • Flagellar antigens
  • Toxin production
  • Catalase enzyme

Which type of agar would E.coli grow pink on?

  • MacConkey's agar (correct)
  • Blood agar
  • EMB agar
  • Chocolate agar

What is the significance of the 'Green Coasters' associated with E.coli?

<p>Metallic green sheen on agar (C)</p> Signup and view all the answers

Which virulence factor of E.coli is particularly responsible for causing neonatal meningitis?

<ul> <li>K antigen (C)</li> </ul> Signup and view all the answers

How does EHEC cause severe Hemorrhagic Colitis?

<p>Inhibition of ribosomes by a toxin (A)</p> Signup and view all the answers

What is the mechanism by which damaged endothelial lining causes thrombocytopenia?

<p>Platelets adhere to the damaged lining, decreasing platelet count and causing thrombocytopenia. (B)</p> Signup and view all the answers

Which E. coli serotype is associated with outbreaks and is commonly referred to as the 'E. coli Burger'?

<p>O157:H7 (B)</p> Signup and view all the answers

What is the mechanism of action of the heat-labile toxin produced by ETEC (Enterotoxigenic E. coli)?

<p>Increases cAMP levels (A)</p> Signup and view all the answers

Which E. coli pathotype is associated with infantile diarrhea and attaches to and effaces the mucosa?

<p>EPEC (Enteropathogenic) (D)</p> Signup and view all the answers

Which E. coli pathotype is characterized by biofilm formation and is associated with endemic persistent diarrhea, acute traveler's diarrhea, and sporadic acute diarrhea?

<p>EAEC (Enteroaggregative) (D)</p> Signup and view all the answers

What is the recommended treatment for E. coli infections, according to the text?

<p>TMP/SMX or fluoroquinolones (C)</p> Signup and view all the answers

What is the main virulence factor of E. coli that leads to neonatal meningitis?

<ul> <li>K antigen (D)</li> </ul> Signup and view all the answers

Which agar type results in E. coli appearing with a metallic green sheen?

<p>EMB Agar (C)</p> Signup and view all the answers

What is the most common cause of UTIs attributed to E. coli?

<p>Bladder Drink with long fimbriae (C)</p> Signup and view all the answers

Which E. coli strain is responsible for severe Hemorrhagic Colitis from consuming undercooked meat?

<p>EHEC (D)</p> Signup and view all the answers

Which virulence factor of E. coli inhibits protein synthesis at the 60s ribosomal subunit?

<p>Toxin inhibiting 28s ribosomes (B)</p> Signup and view all the answers

In which population does Shiga-like Toxin produced by E. coli cause hemolytic uremic syndrome (HUS) more commonly?

<p>Children under 10 years (A)</p> Signup and view all the answers

What is the mechanism by which ETEC (Enterotoxigenic E. coli) causes traveler's diarrhea?

<p>It produces a heat-labile toxin that increases cAMP levels. (C)</p> Signup and view all the answers

Which E. coli pathotype is characterized by attaching to and effacing the mucosa, and is associated with infantile diarrhea?

<p>EPEC (Enteropathogenic) (C)</p> Signup and view all the answers

What is the characteristic feature of the E. coli O157:H7 serotype?

<p>It is associated with outbreaks and is commonly referred to as the 'E. coli Burger'. (C)</p> Signup and view all the answers

Which E. coli pathotype is characterized by inflammatory dysentery and cell invasion?

<p>EIEC (Enteroinvasive) (D)</p> Signup and view all the answers

What is the significance of the mnemonic 'LASG' in the context of E. coli pathotypes?

<p>It represents the mechanisms of action of toxins produced by ETEC. (D)</p> Signup and view all the answers

What is the characteristic feature of EAEC (Enteroaggregative E. coli)?

<p>It forms biofilms and is associated with endemic persistent diarrhea. (A)</p> Signup and view all the answers

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