MCQ Bacteriology (51-60): Question with Answers

MCQ Bacteriology 51 : 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 52: Which of the following species of Pasteurella species has been associated with infections of the female genital tract and a newborn?

a)      Pasteurella multocida
b)      Pasteurella pneumotropica
c)       Pasteurella ureae
d)      Pasteurella bettyae

MCQ Bacteriology 53: 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 54: An 8-year boy was bitten by a stray cat. Two days later, the wound was red, swollen, and drained with 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 55: 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 ingesting food or drinks contaminated by animal 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 56: 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 57: Which of the following subspecies of Francisella tularensis is the most virulent for humans?

a)      Tularensis
b)      Holarctica
c)       Mediasiatica
d)      novicida

MCQ Bacteriology 58: 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 grows 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 59: 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 60: 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

TRY MCQ Bacteriology (61-70): Sexually Transmitted Infections and Spiral Bacteria

Answer Keys

51.c) Streptococcus pyogenes
52. a) Pasteurella multocida
53.try yourself
54.try yourself
55.try yourself
56.e) Doxycycline. Preferred antibiotics for prophylaxis against plague include doxycycline 100 mg PO q12h for 14-21 days (for patients >8 y) or full-dose ciprofloxacin for 7 days.
57.a) tularensis
58.d) On Gram stain of lesions, the organism occurs in strands
59.d) Outer membrane porin protein
60.a) Vibrio vulnificus

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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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