Microbiology Test: Questions And Answers

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Microbiology Test: Questions And Answers

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Questions and Answers
  • 1. 
    The PAP test is useful in the diagnostics of infections caused by:
    • A. 

      Hepatitis C

    • B. 

      Hepatits B

    • C. 

      Molluscum contagiosum virus

    • D. 

      Human papilloma virus

    • E. 

      Herpes virus

  • 2. 
    Debridement, penicillin G, clindamycin, metronidazole, and hyperbaric oxygen may be used in the treatment of infections caused by:
    • A. 

      Clostridium perfringens

    • B. 

      Streptococcus pneumoniae

    • C. 

      Streptococcus pyogenes

    • D. 

      Staphylococcus epidermidis

    • E. 

      Mycobacterium tuberculosis 

  • 3. 
    Common cold is most often caused by:
    • A. 

      Rhinovirus

    • B. 

      Sars-Cov-1

    • C. 

      Sars-coV-2

    • D. 

      Influenza virus

    • E. 

      Streptococcus pyogenese

  • 4. 
    Which of the following toxins causes vascular damage in the colon, kidneys, and central nervous system, what may result in hemorrhagic colitis or more severe conditions such as a hemolytic uremic syndrome?
    • A. 

      Shiga toxin

    • B. 

      Vacuolating cytotoxin VacA

    • C. 

      Enterotoxin from Staphylococcus aureus 

    • D. 

      Listeriolysin O

    • E. 

      Cereulide

  • 5. 
    A 46-year-old sexually active woman is suffering from an infection caused by long spiral bacteria. Point at the most probable species:
    • A. 

      Mycoplasma hominis

    • B. 

      Streptococcus agalactiae

    • C. 

      Haemophilus ducreyi

    • D. 

      Treponema pallidum

    • E. 

      Chlamydia tranchomatis

  • 6. 
    Which of the following UTI pathogens often leads to kidney stones formation?
    • A. 

      Klebsiella pneumoniae

    • B. 

      Acintobacter baumannii

    • C. 

      Pseudomonas aeruginosa

    • D. 

      Staphylococcus saprophyticus

    • E. 

      Proteus mirabillis

    • F. 

      Enterococcus faecalis

  • 7. 
    A 49-year-old man was hospitalized because of a high fever, most probably related to large wounds localized on his left leg. He suffered from diabetes mellitus, during his hospital stay the wounds were cleaned and a swab was taken. The culture was positive for Acinetobacter baumannii, bacteria that are:
    • A. 

      Gram-negative rods

    • B. 

      Sensitive to cephalosporins

    • C. 

      Thermophilic 

    • D. 

      Strictly anaerobic

    • E. 

      Coagulase-positive 

  • 8. 
    A 22-year-old reported fever and headache, paroxysms of stabbing pain in the muscles of the chest and abdomen. The slightest movement of the rib cage caused a sharp increase of pain, which makes it very difficult to breathe. He was diagnoses with Bornholm disease caused by Coxsackie B virus, the pathogen that contains:
    • A. 

      DsDNA

    • B. 

      SsDNA

    • C. 

      Nucleoid

    • D. 

      RNA

    • E. 

      Plasmids

  • 9. 
    Point at the virulence factor playing an important role In the pathogenesis of infections caused by S.aures:
    • A. 

      Streptolysin

    • B. 

      Listeriolisn

    • C. 

      Beta-haemolysin

    • D. 

      LPS

    • E. 

      Shiga toxin

  • 10. 
    If the TPHA test confirms the suspected infection, the following disease has developed:
    • A. 

      Syphillis

    • B. 

      Chancre

    • C. 

      Chancroid

    • D. 

      Gonorrhea

    • E. 

      Herpangina

  • 11. 
    Which of the following species is the common cause of bacterial gastroenteritis and is considered as a major triggering agent of Guillain-Barre Syndrome (GBS)?
    • A. 

      Campylobacter jejuni

    • B. 

      Escherichia coli

    • C. 

      Shigella sonnei

    • D. 

      Salmonella Enteritidis

    • E. 

      Salmonella typhi

    • F. 

      Listeria monocytogenes

    • G. 

      Clostridium perfringens

  • 12. 
    The surgical wound of a 48-year-old patient worsened, pus appeared, cellulitis was observed. Culture of a swab revealed small colonies on Coccosel agar. Under the microscope Gram(+) cocci were observed, Sensitivity tests revealed that they were VRE and HLAR. Infection may be treated with:
    • A. 

      Linezolid

    • B. 

      Vancomycin

    • C. 

      Teicoplanin

    • D. 

      Streptomycin

    • E. 

      Gentamicin

  • 13. 
    Which of the following diarrheagenic pathotypes of E.coli caused diarrhea by producing heat-stable (LT) and /or heat-stable (ST) enterotoxins, which are plasmid-encoded?
    • A. 

      EPEC

    • B. 

      EHEC

    • C. 

      EIEC

    • D. 

      ETEC

    • E. 

      EAEC

  • 14. 
    A 63-year-old man noticed that he has significant weight loss in about 2 months of time. he reported abdominal pain, episodes of diarrhea, and cough in the last weeks. Culture of sputum revealed the presence of acid-fast bacteria so the treatment should last for:
    • A. 

      6 months

    • B. 

      24 months

    • C. 

      1 week

    • D. 

      2 weeks

    • E. 

      4 weeks

  • 15. 
    A 67-year-old man was diagnosed with pneumonia. Alpha-haemolytic and optochin-sensitive bacteria were isolated, under the microscope you most likely see:
    • A. 

      Gram-postive diplococci

    • B. 

      Gram-positive rods

    • C. 

      Gram-negative diplococci

    • D. 

      Gram-negative rods

    • E. 

      Spirochetes

  • 16. 
    Gonorrhea is most often asymptomatic in:
    • A. 

      Women

    • B. 

      Newborns

    • C. 

      Infants

    • D. 

      Preschool children

    • E. 

      Men

  • 17. 
    Which of the following diarrheagenic pathotypes of E.coli colonizes intestinal mucosa via aggregative adherence fimbriae (AAF), formulates mucoid biofilm, and elaborates various enterotoxins and cytotoxins?
    • A. 

      ETEC

    • B. 

      EAEC

    • C. 

      EHEC

    • D. 

      EPEC

    • E. 

      EIEC

  • 18. 
    A make infant has been delivered prematurely. The boy became septic two days after the birth. The infant's blood culture revealed Gram(+), catalase (-) cocci. The mother's vaginal-rectal swab culture showed glistening grey-white colonies with a narrow zone of beta-hemolysin on Columbia Agar. Which of the following is the most likely cause of the infant's infections?
    • A. 

      Streptococcus agalactiae

    • B. 

      Streptococcus pyogenes

    • C. 

      Streptococcus dysgalactiae

    • D. 

      Streptococcus pneumoniae

  • 19. 
     A female student is admitted to the emergency with symptoms of a severe UTI. Gram-negative. facultative anaerobic, motile, lactose-positive rods have been isolated from the middle-stream urine sample. Point at the most causative agent of this infections:
    • A. 

      Serratia marcescens

    • B. 

      Enterobacter cloacae

    • C. 

      Escherichia coli

    • D. 

      Klebsiella pneumoniae

    • E. 

      Citrobacter freundii

  • 20. 
    A 27-year-old women is suffering from a sexually transmitted bacterial infection caused by the obligatory intracellular parasite. which of the following treatment may be administered?
    • A. 

      Carbapenems

    • B. 

      Penicillins

    • C. 

      Glycopeptides

    • D. 

      Cephalosporins

    • E. 

      Tetracyclines

  • 21. 
    A 3-year-old failed to thrive, lost weight, complaining about abdominal pain. The mother reported that her son had episodes of diarrhea and cough. The sputum culture revealed the presence of acid-fast bacteria, the cell wall of which contains:
    • A. 

      Sulfatides

    • B. 

      Lipid A

    • C. 

      Antigen H

    • D. 

      Antigen 0

    • E. 

      Protein A

  • 22. 
    If the female newborn presents with infectious conjunctivitis, her mother most probably suffers from:
    • A. 

      Gonorrhea

    • B. 

      Meningococcemia

    • C. 

      Bacterial vaginosis

    • D. 

      Syphills

    • E. 

      GBS pneumonia

  • 23. 
    A 56-year-old man is admitted to the emergency with left flank pain (pain in the lumbar region). A CAT scan is being ordered along with a urinalysis and microbiological culture. A CAT scan shows two kidney stones. Urinalysis is positive for blood, nitrites, and bacteria in the urine. Microbiological culture shows Gram-negative lactose-negative rods, Point at the most likely pathogen:
    • A. 

      Proteus penneri

    • B. 

      Acinetobacter baumannii

    • C. 

      Pseudomonas aeruhinosa

    • D. 

      Morganella morganii 

  • 24. 
    The burn wound of the 22-year-old patient worsened, blue-green pus appeared, cellulitis was observed. The culture of a swab revealed Jasmin smelling of the greenish colonies. Gram-negative rods were observed under the light microscope. The most likely species was:
    • A. 

      Pseudomonas aeruginosa

    • B. 

      Acinetobacter baumannii

    • C. 

      Escherichia coli

    • D. 

      Legionella pneumophlia

    • E. 

      Bacteroids fragills

  • 25. 
    Which of the following bacterial colonies will be large and yellow after 24 hours of incubation at 37 celsius on the Thiosulfate-Citrate-Bile Salts-Sucrose (TCBS) Agar?
    • A. 

      Vibrio cholerae colonies

    • B. 

      Campylocabacter jejuni colonies

    • C. 

      Listeria monocytogenes colonies

    • D. 

      Escherichia coli colonies

    • E. 

      Pseudomonas aeruginosa colonies

    • F. 

      Shigella sonnei colonies