Microbiology Quiz: Streptococcus & Enterococcus
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Questions and Answers

Which characteristic is NOT associated with Streptococcus spp. and Enterococcus spp.?

  • Gram positive cocci
  • Catalase positive (correct)
  • Facultatively anaerobic
  • Nonmotile

What is a common symptom of rheumatic fever?

  • Proteinuria
  • Fever (correct)
  • Hypertension
  • Hematuria

S.pneumoniae is primarily associated with which of the following infections?

  • Rheumatic fever
  • Acute glomerulonephritis
  • Otitis media (correct)
  • Polyarthritis

Which of the following Streptococcus species is known for its beta-hemolytic pattern?

<p>S.pyogenes (A)</p> Signup and view all the answers

What type of infection does 'flesh-eating bacteria' commonly refer to?

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

Which of the following is NOT a typical cause of otitis media?

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

What is a primary characteristic of Enterococcus spp.?

<p>Nonmotile Gram positive cocci (D)</p> Signup and view all the answers

What type of hemolysis is characteristic of viridans streptococci?

<p>Alpha-hemolytic (C)</p> Signup and view all the answers

What condition is characterized by a superficial blister covered with pus or a honey-colored crust?

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

Which of the following methods is NOT commonly used for laboratory diagnosis of skin infections?

<p>Blood smear analysis (B)</p> Signup and view all the answers

What is a common characteristic of Erysipelas?

<p>It presents as acute superficial cellulitis. (C)</p> Signup and view all the answers

Which test is used to assess antibodies for respiratory disease in laboratory diagnoses?

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

Which of the following conditions typically follows surgical wounds or trauma?

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

What is a feature of Necrotizing fasciitis?

<p>It is highly virulent. (B)</p> Signup and view all the answers

Which of the following organisms is associated with chronic otitis media in children?

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

What type of infection can be characterized by high fever alongside purulent exudates?

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

What is the appearance of Bacillus anthracis colonies on agar?

<p>Dry and irregular with a ground glass look (D)</p> Signup and view all the answers

Which of the following characteristics is NOT associated with Bacillus anthracis?

<p>It is catalase negative (B)</p> Signup and view all the answers

What type of environments are Bacillus species primarily associated with for causing disease?

<p>Wild and domestic herbivore populations (A)</p> Signup and view all the answers

What kind of infections are associated with the handling of animal products like hides and hair?

<p>Respiratory infections from endospores (A)</p> Signup and view all the answers

Which toxin is identified as a virulence factor of Bacillus anthracis?

<p>Lethal Toxin (LT) (D)</p> Signup and view all the answers

What symptoms can Bacillus anthracis infections lead to in humans?

<p>Diarrhea and abdominal pain (B)</p> Signup and view all the answers

Why is penicillin indicated in the treatment of Bacillus anthracis infections?

<p>Bacillus anthracis is sensitive to penicillin (D)</p> Signup and view all the answers

What type of hemolysis is associated with streptolysin O produced by S.pyogenes?

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

Which virulence factor helps Listeria monocytogenes escape the phagosome?

<p>Listeriolysin O (A), Phospholipases (D)</p> Signup and view all the answers

What is the role of the bacterial surface protein Act A?

<p>Induces host cell actin polymerization (A)</p> Signup and view all the answers

Which of the following tests is positive for identifying Listeria monocytogenes?

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

What is the purpose of cold enrichment in the recovery of Listeria monocytogenes?

<p>To enhance growth of L. monocytogenes (D)</p> Signup and view all the answers

Which characteristic indicates Listeria monocytogenes has a narrow zone of B-hemolysis?

<p>Fermentation of glucose (C)</p> Signup and view all the answers

What does the positive Voges-Proskauer test indicate about Listeria monocytogenes?

<p>Production of acetoin (A)</p> Signup and view all the answers

What challenge is faced when isolating Listeria monocytogenes from placental tissues?

<p>High concentration of normal flora (D)</p> Signup and view all the answers

Which of these factors does NOT contribute to the virulence of Listeria monocytogenes?

<p>High antibiotic susceptibility (C)</p> Signup and view all the answers

What is a clinical indicator for enhanced recovery of Listeria monocytogenes?

<p>Isolation from normally sterile sites (D)</p> Signup and view all the answers

Which method is NOT typically used for the presumptive identification of Listeria monocytogenes?

<p>Blood agar culture (B)</p> Signup and view all the answers

What is a notable characteristic of C. jeikeium and C. urealyticum?

<p>Resistance to multiple antibiotics (D)</p> Signup and view all the answers

Which of the following is a potential consequence of listeriosis?

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

What is the significance of the Listeriolysin O (hly gene) in clinical diagnostics?

<p>It indicates the presence of Listeria monocytogenes. (B)</p> Signup and view all the answers

What is recommended for the storage of leftover ready-to-eat food items?

<p>Heat before consumption and limit storage duration. (C)</p> Signup and view all the answers

Which characteristic can lead to misidentification of bacteria in the API CORYNE STRIP method?

<p>Generation of an incorrect code (D)</p> Signup and view all the answers

What kind of isolation is acceptable for diagnosing a urinary tract infection if present as pure culture?

<p>Isolation from urine (C)</p> Signup and view all the answers

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