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 of 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 and swollen and drained purulent fluid. Pasteurella multocida was cultured from the wound. The drug of choice to treat this infection is
d) Penicillin G
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 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 56: Intimate contacts of patients with suspected plague pneumonia should receive which of the following agents as chemoprophylaxis?
MCQ Bacteriology 57: Which of the following subspecies of Francisella tularensis is the most virulent for humans?
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 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 59: Which of the following cell components produced by Neisseria gonorrhoeae is responsible for attachment to host cells?
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
51.c) Streptococcus pyogenes
52. a) Pasteurella multocida
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.
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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