MCQs Bacteriology: Bacterial Skin Infections

By Acharya Tankeshwar •  Updated: 06/07/21 •  2 min read

You can find the answer of these multiple choice questions related to bacterial skin infections at the end of this blog post. Write down your answers and cross check with the answer key provided.  

MCQ Bacteriology 39:  A massive lesion caused by the spread of Staphylococcus aureus infection (often on the neck and upper back) is called:
a. Boil
b. Abscess
c. Furuncle
e. Pustule

MCQ Bacteriology 40: Scalded skin syndrome is caused by exotoxin (exfoliatins) produced by:
a. Streptococcus pyogens
b. Pseudomonas aeruginosa
c. Staphylococcus aureus
d. Propionibacterium acne
e. Demodex folliculorum  

MCQ Bacteriology 41: Which of the following microorganisms causes scarlet fever?
a. Streptococcus pyogens
b. Pseudomonas aeruginosa
c. Staphylococcus aureus
d. Propionibacterium acne
e. Demodex folliculorum

MCQ Bacteriology 42: The pus producing skin infections (pyoderma) can be caused by
a. Staphylococci
b. Streptococci
c. Corynebacteria
d. A combination of staphylococci, streptococci and corynebacteria
e. All of these  

MCQ Bacteriology 43: Which of the following is not the characteristics of impetigo?
a. Common in children
b. Can be caused by Staphylococcus aureus
c. Can be caused by Streptococcus pyogenes
d. Is highly contagious
e. Can be caused by pseudomonads

MCQ Bacteriology 44: Burn patients often develop nosocomial infection caused by:
a. Staphylococcus epidermis
b. Corynebacterium spp.
c. Staphylococcus aureus
d. Candida albicans
e. Pseudomonas aeruginosa

MCQ Bacteriology 45: The bacteria that multiply in blocked skin pores, metabolize sebum, and can lead to the development of acne are:
a. Pseudomonas aeruginosa
b. Propionibacterium spp.
c. Serratia marcescens
d. Streptococcus pyogenes
e. Acne is not caused by bacterial infection  

MCQ Bacteriology 46: Bacterial conjunctivitis (inflammation of the eye conjunctiva) can be caused by:
a. Staphylococcus aureus
b. Streptococcus pneumoniae
c. Neisseria gonorrhoeae
d. Pseudomonas aeruginosa
e. All of the above bacteria can cause conjunctivitis  

MCQ Bacteriology 47: The leading cause of preventable blindness in the world is caused by:
a. Chlamydia trachomatis
b. Haemophilus influenzae
c. Neisseria gonorrhoeae
d Staphylococcus aureus
e. Streptococcus pneumoniae

MCQ Bacteriology 48: Gas gangrene is most likely associated with infection with:
a. Staphylococcus aureus
b. Clostridium perfringenes
c. Streptococcus pneumoniae
d. Neisseria gonorrhoeae
e. Pseudomonas aeruginosaa

Answer Key: 

39. c. Furuncle

40.c. Staphylococcus aureus

41.a. Streptococcus pyogens

42.e. All of these

43.e. Can be caused by pseudomonads

44.e. Pseudomonas aeruginosa

45.b. Propionibacterium spp.

46. e. All of the above bacteria can cause conjunctivitis

47.a.Chlamydia trachomatis

48. b. Clostridium perfringenes  

Test your understanding in Bacteriology. Try our dedicated MCQ Quiz section for Bacteriology. 

Acharya Tankeshwar

Hello, thank you for visiting my blog. I am Tankeshwar Acharya. Blogging is my passion. As an asst. professor, I am teaching microbiology and immunology to medical and nursing students at PAHS, Nepal. I have been working as a microbiologist at Patan hospital for more than 10 years.

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7 responses to “MCQs Microbiology: Bacteriology with Answers”

  1. periplasm says:

    2.b (but, as i have known, Gram stain doesn’t give color because of Peptidoglycan layer. Gram stain stains cell on the basis of lipid content on cell wall.)
    4. i think it’s a. But option d is also susceptible.
    6.c (is it correct?)

  2. Hythm Bkry says:

    1.d 2.d 3.a 4.c 5.a 6.c 7.c 8d. 9.d 10. b

  3. Abdullah says:

    The blood exam of a patient with brucellosis and toxoplasmosis positive results required by physician for blood culture and in culture proteous has been grown why the real factor of brucellosis which is brucella not grown and this has been repeated many times. I do need your consults regarding the issue.
    Thanks for your attention

    • Zain Mumtaz says:

      Proteus give blood culture positive within 24 hours of incubation. While brucella required long incubation period as up to 14 days. Patient may have bacterimia with both bacteria and proteus overcome brucella growth in blood bottle.

  4. narayan says:

    you are provide wrong answers

    • Tankeshwar Acharya says:

      Dear Narayan
      Sorry for the inconvenience caused. Can you please help me by providing specific information, which key is wrong. We will correct it ASAP.

  5. Pradepha Davis says:

    Hi Sir
    Could you please let me know the name of the book where you got these questions ?

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