BACT 211 Week 9: Enterobacteriaceae General Characteristics
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Questions and Answers

Which virulence factor is associated with Proteus, Morganella, and Providencia?

  • Prodigiosin production
  • Lipase production
  • Fimbriae (correct)
  • ONPG positivity

    • Which bacterial species is responsible for acute gastroenteritis and food poisoning?

  • Serratia
  • Proteus (correct)
  • Morganella
  • Citrobacter

    • Which bacterial genus appears as metallic colonies with a black ring in Bismuth sulfite agar?

  • Enterobacter
  • Yersinia (correct)
  • Salmonella
  • Shigella

    • Which bacterial species produces a red pigment called prodigiosin?

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

    Which bacterial genus is characterized by being non-motile and H2S negative?

    <p>Shigella (B)</p> Signup and view all the answers

    Which bacterial group is associated with a carrier state where organisms are harbored in the gallbladder?

    <p>Proteus, Morganella, and Providencia (B)</p> Signup and view all the answers

    Which of the following characteristics is NOT true about Enterobacteriaceae?

    <p>Oxidase Positive (Except Plesiomonas shigelloides) (B)</p> Signup and view all the answers

    Which of the following Enterobacteriaceae members is NOT motile at body temperature?

    <p>Klebsiella (A)</p> Signup and view all the answers

    What is the most common disease syndrome caused by Uropathogenic E.coli?

    <p>Urinary Tract Infection (UTI) (A)</p> Signup and view all the answers

    What is the virulence factor of Enterotoxigenic E.coli (ETEC) for attachment to cells of the small bowel?

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

    Which disease is commonly associated with Enterohemorrhagic E.coli (EHEC)?

    <p>Dysentery and Bloody stools (B)</p> Signup and view all the answers

    What characteristic test is positive for Uropathogenic E.coli (UPEC)?

    <p>Sereny test (+) (A)</p> Signup and view all the answers

    Which virulence factor is associated with Enteropathogenic E.coli (EPEC)?

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

    What disease is caused by Serotype O157:H7 strain of E.coli?

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

    Which type of E.coli is associated with UTI and diarrheal disease?

    <p>Diffusely adherent E.coli (DAEC) (B)</p> Signup and view all the answers

    What characteristic is common to Klebsiella and Enterobacter colonies?

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

    Which of the following is a primary intestinal pathogen?

    <p>Salmonella (A)</p> Signup and view all the answers

    What characteristic helps in the laboratory diagnosis of Proteus?

    <p>&quot;Swarming motility&quot; (D)</p> Signup and view all the answers

    What is the clinical manifestation associated with Shigella dysenteriae infection?

    <p>Bloody and mucoid stools (D)</p> Signup and view all the answers

    What is a characteristic feature of Yersinia pestis in laboratory diagnosis?

    <p>Cauliflower appearance at 48 hrs in SBA (A)</p> Signup and view all the answers

    Which of the following is a disease caused by Yersinia pseudotuberculosis?

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

    What is a typical characteristic of Plesiomonas shigelloides in laboratory diagnosis?

    <p>White to pink in inositol brilliant green bile salt agar (D)</p> Signup and view all the answers

    Which group is categorized as OPPORTUNISTIC pathogens among the given options?

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

    What is a key differentiating factor for Salmonella compared to the other bacteria mentioned?

    <p>Grows preferentially at 25°C to 30°C (A)</p> Signup and view all the answers

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