MCQ Bacteriology Question with Answers

Last updated on May 13th, 2021

MCQ Bacteriology 49: Which of the following is generally not considered a potential agent of bioterrorism and biologic warfare?

a.      Yersinia pestis

b.      Botulinum toxin

c.       Streptococcus pyogenes

d.      Brucella species

e.       Bacillus anthracis

You can find the complete list of Bio-terrorism agents here

MCQ Bacteriology 50: Which of the following species of Pasteurella species has been associated with infections of the female genital tract and of a newborn?

a)      Pasteurella multocida

b)      Pasteurella pneumotropica

c)       Pasteurella ureae

d)      Pasteurella bettyae

MCQ Bacteriology 51: In a patient who has bubonic form of plague, all of the following specimens are acceptable for diagnosis except:

a)      Stool culture on hektoen enteric agar

b)      Blood culture using routine laboratory media

c)       Culture of a lymph node aspirate on blood or MacConkey agar

d)      Acute and convalescent serology

e)      Immunohistochemical staining of lymph node tissue

MCQ Bacteriology 52: An 8-year boy was bitten by a stray cat. Two days later, the wound was red and swollen and drained purulent fluid. Pasteurella multocida was cultured from the wound. The drug of choice to treat this infection is

a)      Amikacin

b)      Erythromycin

c)       Gentamicin

d)      Penicillin G

e)      Clindamycin

MCQ Bacteriology 53: All of the following statements regarding the epidemiology of infections caused by Yersinia enterocolitica are correct except:

a)      Most human infections are caused by serotype O: 1

b)      Humans acquire the infection from ingestion of food or drinks contaminated by animals or animal products.

c)       Person to person spread is quite common

d)      A large inoculum is required to cause infection

e)      Infection is more prevalent in persons with histocompatibility antigen HLA-B27.

MCQ Bacteriology 54: Intimate contacts of patients with suspected plague pneumonia should receive which of the following agents as chemoprophylaxis?

a)      Gentamicin

b)      Cefazolin

c)       Rifampin

d)      Penicillin

e)      Doxycycline

MCQ Bacteriology 55: Which of the following subspecies of Francisella tularensis is the most virulent for humans?

a)      Tularensis

b)      Holarctica

c)       Mediasiatica

d)      novicida

MCQ Bacteriology 56: All the following statements regarding etiologic agents of chancroid are correct except:

a)      The organism is a small gram negative rod

b)      The organism requires X factor but not V factor

c)       The organism grow well on standard chocolate agar

d)      On Gram stain of lesions the organism occurs in strands

e)      The organism is susceptible to erythromycin

MCQ Bacteriology 57: Which of the following cell components produced by Neisseria gonorrhoeae is responsible for attachment to host cells?

a)      Lipooligosaccharide

b)      Pili (Fimbriae)

c)       IgA1 protease

d)      Outer membrane porin protein

e)      Iron binding protein

MCQ Bacteriology 58: A 8-year girl was playing in a slowly moving stream when she cut her foot on a sharp object. Three days later she was brought to the emergency room of Tribhuvan University Teaching Hospital because of pain and swelling at the site of the wound and drainage of pus from it. The most likely cause of the infection is
a. Vibrio vulnificus
b. Escherichia coli
c. Aeromonas hydrophila
d. Proteus mirabilis
e. Salmonella typhimurium

Answer Keys

49.c) Streptococcus pyogenes
50. a) Pasteurella multocida
51.try yourself
52.try yourself
53.try yourself
54.try yourself
55.a) tularensis
56.d) On Gram stain of lesions the organism occurs in strands
57.d) Outer membrane porin protein
58.a) Vibrio vulnificus

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