Microbiology Testing Trivia Questions

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  • 1/25 Questions

    The most likely causative organism in community-acquired UTI is:

    • Klebsiella species
    • Proteus mirabilis
    • E. coli
    • Staph saprophyticus
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Microbiology Testing Trivia Questions - Quiz

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  • 2. 

    A 36-year-old afebrile woman with no health problems presents with dysuria and frequency of urination. Her urinalysis findings include results positive for nitrites and leukocyte esterase. You evaluate these results and consider that she likely has:

    • Purulent vulvovaginitis

    • A gram-negative UTI

    • Cystitis caused by Staph saprophyticus

    • Urethral syndrome

    Correct Answer
    A. A gram-negative UTI
  • 3. 

    Which of the following is a gram-negative diplococcus?

    • Strep. pneumoniae

    • Neisseria meningitidis

    • Staph aureus

    • H. influenzae

    Correct Answer
    A. Neisseria meningitidis
  • 4. 

    The primary mechanism of antimicrobial resistance of H. influenzae is through the organism's

    • Beta-lactamase production

    • Hypertrophy of cell membrane

    • Alteration in protein-binding sites

    • Failure of DNA gyrase reversal

    Correct Answer
    A. Beta-lactamase production
  • 5. 

    A Tzanck smear that is positive for giant multinucleated cells was taken from a lesion caused by:

    • Herpes virus

    • S. aureus

    • Streptococci

    • Allergic reaction

    Correct Answer
    A. Herpes virus
  • 6. 

    The most common causative organism in ABRS is:

    • M. pneumoniae

    • S. pneumoniae

    • M. catarrhalis

    • H. influenzae

    Correct Answer
    A. S. pneumoniae
  • 7. 

    The likely causative organism of nonbullous impetigo in a 6-year-old include:

    • H. influenzae and S. pneumoniae

    • Group A strep and S. aureus

    • M. catarrhalis and select viruses

    • P. aeruginosa and select fungi

    Correct Answer
    A. Group A strep and S. aureus
  • 8. 

    Which of the following organisms is not gram-negative?

    • E. coli

    • K. pneumoniae

    • P. mirabilis

    • S. saprophyticus

    Correct Answer
    A. S. saprophyticus
  • 9. 

    The most common causative organisms in cellulitis are:

    • E. coli and H. influenzae

    • Bacteroides species and other anaerobes

    • Group A beta-hemolytic streptococci and S. aureus

    • Pathogenic viruses

    Correct Answer
    A. Group A beta-hemolytic streptococci and S. aureus
  • 10. 

    Clindamycin is most effective against which of the following organisms?

    • S. pneumonia

    • H. influenzae

    • M. catarrhalis

    • Adenovirus

    Correct Answer
    A. S. pneumonia
  • 11. 

    Which of the following is an oral antimicrobial option for the treatment of a commonly acquired MRSA cutaneous lesion?

    • Amoxicillin

    • Dicloxacillin

    • Cephalexin

    • Trimethoprim-sulfamethoxazole

    Correct Answer
    A. Trimethoprim-sulfamethoxazole
  • 12. 

    Which of the following pathogens is often implicated in a COPD exacerbation caused by bacterial respiratory tract infection?

    • Legionella species

    • Strep. pyogenes

    • H. influenzae

    • Staph aureus

    Correct Answer
    A. H. influenzae
  • 13. 

    Incubation period for S. pyogenes is usually:

    • 1-3 days

    • 3-5 days

    • 6-9 days

    • 10-13 days

    Correct Answer
    A. 3-5 days
  • 14. 

    Which of the following is a characteristic of S. pneumoniae?

    • Mechanism of antimicrobial resistance primarily through the production of beta-lactamase

    • Mechanism of antimicrobial resistance primarily through altered protein-binding sites held within the microbe's cell.

    • Organisms most commonly isolated from mucoid middle ear effusion

    • Gram-negative organisms

    Correct Answer
    A. Mechanism of antimicrobial resistance primarily through altered protein-binding sites held within the microbe's cell.
  • 15. 

    The spectrumof antimicrobial activity of mupirocin (Bactroban) includes:

    • Primarily gram-negative organisms

    • Select gram-positive organisms

    • Pseudomonas species and anaerobic organisms

    • Only organisms that do not produce beta-lactamase

    Correct Answer
    A. Select gram-positive organisms
  • 16. 

    With regard to pharyngitis caused by group C streptococci, the NP considers that:

    • Potential complications include glomerulonephritis

    • Appropriate antimicrobial therapy helps to facilitate more rapid resolution of symptoms

    • Infection with these organisms carries a significant risk of subsequent rheumatic fever

    • Acute infectious hepatitis can occur if not treated with an appropriate antimicrobial.

    Correct Answer
    A. Appropriate antimicrobial therapy helps to facilitate more rapid resolution of symptoms
  • 17. 

    An organism often associated with COPD exacerbation in a person with advanced disease and repeated exacerbations is:

    • Pseudomonas aeruginosa

    • Chlamydophila pneumoniae

    • Strep pneumoniae

    • H. influenzae

    Correct Answer
    A. Pseudomonas aeruginosa
  • 18. 

    The mechanism of resistance of DRSP is through the cell's

    • Beta-lactamase production

    • Hypertrophy of cell membrane

    • Alteration in protein-binding sites

    • Failure of DNA gyrase reversal

    Correct Answer
    A. Alteration in protein-binding sites
  • 19. 

    Which of the following is a characteristic of H. influenzae?

    • Newer macrolides are ineffective against the organism

    • Its antimicrobial resistance results from altered protein-binding sites within the wall of the bacteria

    • Some isolates exhibit antimicrobial resistance via production of beta-lactamase

    • This is a gram-positive organism

    Correct Answer
    A. Some isolates exhibit antimicrobial resistance via production of beta-lactamase
  • 20. 

    Characteristics of M. catarrhalis include:

    • High rate of beta-lactamase production

    • Antimicrobial resistance resulting from altered protein-binding sites

    • Often being found in middle ear exudate in recurrent otitis media

    • Gram-positive organisms

    Correct Answer
    A. High rate of beta-lactamase production
  • 21. 

    The most sensitive and specific test for H. pylori infection from the following list is:

    • Stool Gram stain, looking for the offending organism

    • Serological testing for antigen related to the infection

    • Organism-specific stool antigen testing

    • Fecal DNA testing

    Correct Answer
    A. Organism-specific stool antigen testing
  • 22. 

    A man presents with otitis externa. The likely causative pathogens include all of the following except:

    • Fungal agents

    • P. aeruginosa

    • S. aureus

    • M. catarrhalis

    Correct Answer
    A. M. catarrhalis
  • 23. 

    The likely causative organism in AOM include:

    • Certain gram-positive and gram-negative bacteria

    • Gram-negative bacteria and pathogenic viruses

    • Rhinovirus and S. aureus

    • Predominantly beta-lactamase-producing organisms

    Correct Answer
    A. Certain gram-positive and gram-negative bacteria
  • 24. 

    Which of the following WBC forms is an ominous finding in the presence of severe bacterial infection?

    • Neutrophil

    • Lymphocyte

    • Basophil

    • Metamyelocyte

    Correct Answer
    A. Metamyelocyte
  • 25. 

    The notation of alkaline urine in a patient with a UTI may point to infection caused by:

    • Klebsiella species

    • P. mirabilis

    • E.coli

    • S. Saprophyticus

    Correct Answer
    A. P. mirabilis

Quiz Review Timeline (Updated): Mar 22, 2022 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 30, 2010
    Quiz Created by
    Ctichy84
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