Staphylococci

• Q1.A 29 year old male was brought to ED with complaints of nausea, vomiting and abdominal cramps 3-4 hours after eating a meat in dinner. What is the likely cause of this condition?

  • ASalmonella Enteritidis
  • BStaphylococcus aureus
  • CClostridium botulinum
  • DClostridium perfringens
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• Q2.Test to differentiate staphylococci from micrococci:

  • ACatalase test
  • BCoagulase test
  • CNovobiocin sensitivity
  • DOxidation fermentation
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• Q3.Which of the following is most useful to differentiate micrococci from staphylococci?

  • ACatalase test
  • BHugh-Leifson test
  • CCoagulase test
  • DAll of the above
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• Q4.Panton-valentine leukocidin is produced by:

  • AStaphylococcus epidermidis
  • BPseudomonas
  • CVibrio cholerae
  • DStaphylococcus aureus
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• Q5.A 12 year old boy presents with vomiting within 3 hours of consumption of food at a party. What is the likely causative organism responsible for the symptoms ?

  • AStaphylococcus aureus
  • BSalmonella
  • CClostridium botulinum
  • DClostridium perfringens
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• Q6.a 25 year old female presented to the hospital on 3rd day of menstruation with complaints of high fever vomiting and rash on her trunk and extremities. on investigations she had leukocytosis and negative blood culture. she is diagnosed as :

  • Astaphylococcal food poisoning
  • Bscalded skin syndrome
  • Ctoxic shock syndrome
  • Dvaricella zoster infection
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• Q7.Virulence factors of Staphylococcus aureus include all of the following except one. Which one is the exception?

  • ABeta-lactamases
  • BCoagulase
  • CEnterotoxins
  • DM Protein
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• Q8.A 12yr old boy presents with vomiting within 3 hours of consumption of food at a party. What is the likely causative organism

  • AStaphylococcus aureus
  • BSalmonella
  • CClostridium botulinum
  • DClostridium perfringens
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• Q9.Which of the following is known to cause Pedal Botryomycosis -

  • AActinomyces somaliensis
  • BNocardia asteroides
  • CStaphylococcus aureus
  • DAll of the above
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• Q10.Gene responsible for semisynthetic penicillin resistance in Methicillin resistant Staph aureus (MRSA)?

  • AMec A
  • BMec B
  • CMec D
  • DMec C
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Answer key

Q1: B. Staphylococcus aureus; Q2: D. Oxidation fermentation; Q3: B. Hugh-Leifson test; Q4: D. Staphylococcus aureus; Q5: A. Staphylococcus aureus; Q6: C. toxic shock syndrome; Q7: D. M Protein; Q8: A. Staphylococcus aureus; Q9: C. Staphylococcus aureus; Q10: A. Mec A.

Other topics in Microbiology

• Principles of General Microbiology
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• Immune System: Organisation, Function and Response
• Hypersensitivity
• Disorders of Immunity
• Streptococci and Enterococci
• Corynebacterium, Listeria and Actinomyces
• Clostridium and Bacillus
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• Escherichia, Proteus and Klebsiella
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• Vibrio and Campylobacterales
• Pseudomonas and Burkholderiales
• Haemophilus
• Yersinia, Brucella, Bartonella and Legionella
• Gram-Negative Cocci
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• Virus Structure and General Properties
• DNA Viruses
• Hepatitis
• HIV
• Myxoviruses and Rhabdoviruses
• Arboviruses and Picornaviruses
• Rubella, Coronaviruses, Prions, Rotavirus, Filovirus, Zika Virus and Nipah Virus
• Superficial and Systemic Fungal Infections
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• Principles of Parasitology
• Protozoa: Amoebae, Ciliates and Flagellates
• Protozoa: Sporozoa
• Helminths: Cestodes and Trematodes
• Helminths: Nematodes
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