Normal flora and Infectious Diarrhea Quiz L2
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Questions and Answers

Which of the following is a potential pathogen found in the mouth microbiota?

  • Lactobacillus
  • E.coli
  • Streptococci
  • Neisseria spp (correct)

    • What is the most common cause of acute diarrheal illness worldwide?

  • Viral etiology (correct)
  • Protozoan etiology
  • Altered bowel movement
  • Bacterial etiology

    • Which of the following is NOT a characteristic of acute diarrheal illness?

  • $ ext{Watery stools for more than 14 days}$ (correct)
  • $ ext{Alteration in normal bowel movement}$
  • $ ext{Increased frequency of bowel movements}$
  • $ ext{Stool weight in excess of 200 gm/day}$

    • What is the predominant cause of severe diarrhea requiring treatment?

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

    Which microorganism is NOT listed as a potential pathogen in the mouth microbiota?

    <p>$ ext{Lactobacillus}$ (B)</p> Signup and view all the answers

    $ ext{E.coli, Salmonella, Shigella, and Yersinia enterocolitica}$ are able to cause diseases in which part of the body?

    <p>$ ext{Intestinal tract}$ (C)</p> Signup and view all the answers

    What is the predominant cause of infectious diarrhea in developed countries?

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

    Which microorganism can enter the blood from the oral cavity and infect damaged heart valves?

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

    Which part of the body has limited microbiota due to hydrochloric acid (HCL) and peptic enzymes?

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

    Which microorganism is listed as a potential pathogen in the nasopharynx microbiota?

    <p>S.pneumoniae (B)</p> Signup and view all the answers

    Which microorganism is NOT found in the stomach microbiota?

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

    What is the main role of the microbiota of the gastrointestinal tract (GIT)?

    <p>Inhibit competing intruders and benefit the host (C)</p> Signup and view all the answers

    Where are normal flora commonly found in the GIT?

    <p>Colon, small intestine, and stomach (D)</p> Signup and view all the answers

    What is the approximate number of bacteria per gram of stool in the GIT?

    <p>$10^{10}$ org/g stool (D)</p> Signup and view all the answers

    Which bacteria constitute over 90% of the normal flora in the GIT?

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

    What is the main characteristic of microbiota in normal healthy individuals?

    <p>They have a symbiotic relationship that benefits the host (A)</p> Signup and view all the answers

    In which individuals can microbiota cause disease?

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

    What body sites do microbiota frequently inhabit in normal healthy individuals?

    <p>Skin, oral cavity, and respiratory tract (B)</p> Signup and view all the answers

    Which microorganism is NOT found in the stomach microbiota?

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

    What is the approximate number of bacteria per gram of stool in the GIT?

    <p>$10^{10}$ org/g stool, &gt;90% are Bacteroides (anaerobic) (C)</p> Signup and view all the answers

    What is the predominant cause of infectious diarrhea in developed countries?

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

    Where are normal flora commonly found in the GIT?

    <p>Colon and small intestine (C)</p> Signup and view all the answers

    $E.coli$, Salmonella, Shigella, and $Yersinia$ $enterocolitica$ are able to cause diseases in which part of the body?

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

    Which of the following is NOT a characteristic of acute diarrheal illness?

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

    $70-80%$ of infectious diarrhea in developed countries is caused by:

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

    $Acute$ $diarrheal$ $illness$ is characterized by:

    <p>$Altered$ normal bowel movement (A)</p> Signup and view all the answers

    $\text{E.coli, Salmonella, Shigella, and Yersinia enterocolitica}$ are able to cause diseases in which part of the body?

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

    $\text{Campylobacter, Yersinia, and Clostridium difficile}$ are known pathogens that cause which condition?

    <p>$\text{Infectious diarrhea}$ (D)</p> Signup and view all the answers

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