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 pestisb.      Botulinum toxinc.       Streptococcus pyogenesd.      Brucella speciese.       Bacillus anthracis

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

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

a)      Pasteurella multocidab)      Pasteurella pneumotropicac)       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 agarb)      Blood culture using routine laboratory mediac)       Culture of a lymph node aspirate on blood or MacConkey agard)      Acute and convalescent serologye)      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)      Amikacinb)      Erythromycinc)       Gentamicind)      Penicillin Ge)      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: 1b)      Humans acquire the infection from ingesting food or drinks contaminated by animal or animal products.c) Person-to-person spread is quite commond)      A large inoculum is required to cause infectione)      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)      Gentamicinb)      Cefazolinc)       Rifampind)      Penicilline)      Doxycycline

MCQ Bacteriology 57: Which of the following subspecies of Francisella tularensis is the most virulent for humans?

a)      Tularensisb)      Holarcticac)       Mediasiaticad)      novicida

MCQ Bacteriology 58: All the following statements regarding etiologic agents of chancroid are correct except:

a)      The organism is a small gram-negative rodb)      The organism requires X factor but not V factorc)       The organism grows well on standard chocolate agard)      On Gram stain of lesions, the organism occurs in strandse)      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)      Lipooligosaccharideb)      Pili (Fimbriae)c)       IgA1 proteased)      Outer membrane porin proteine)      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 isa. Vibrio vulnificusb. Escherichia colic. Aeromonas hydrophilad. Proteus mirabilise. Salmonella Typhimurium

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

Answer Keys

51.c*)* Streptococcus pyogenes52. a) Pasteurella multocida53.try yourself 54.try yourself55.try yourself56.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) tularensis58.d) On Gram stain of lesions, the organism occurs in strands59.d) Outer membrane porin protein60.a) Vibrio vulnificus

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