Dashboard / My courses / Micro 2nd Sem SY 2019 MD2-F,G,H,I,J,W,X / REVIEW EXAMS (2nd Prelims Topics)
/ Staphylococcus/ Streptococcus/ Neisseria
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Question 1
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Tuesday, 19 May 2020, 6 04 AM
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Tuesday, 19 May 2020, 6 06 AM
1 min 48 secs
Group B Streptococcus agalactiae causes neonatal septicemia and meningitis via:
Select one:
a. Transmission through breastmilk
b. Passage thru an infected birth canal 
c. Airborne transmission
d. Transplacental transfer
The correct answer is: Passage thru an infected birth canal
Question 2
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How do you differentiate S. aureus from other Staphylococcus species?
Select one:
a. Coagulase test 
b. Catalase test
c. Hemolysis test
d. Novobiocin sensitivity test
The correct answer is: Coagulase test
Question 3
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During ER rotation, you treated a patient who was later suspected of having Neisseria meningitidis infection. What
should you do?
Select one:
a. Take Rifampicin or Ciprofloxacin prophylaxis single dose 
b. Do nothing. Neisseria is sexually transmitted
c. Be admitted for IV Penicillin G for 5 days
d. Quarantine yourself for 2 weeks at home
The correct answer is: Take Rifampicin or Ciprofloxacin prophylaxis single dose
Question 4
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How do you differentiate Staphylococcus form Streptococcus?
Select one:
a. Novobiocin sensitivity test
b. Coagulase test
c. Catalase test 
d. Hemolysis test
The correct answer is: Catalase test
Question 5
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Antibiotics recommended for Methicillin Resistant Staph. aureus or MRSA:
Select one:
a. Methicillin
b. Vancomycin 
c. Erythromycin
d. Amoxicillin
The correct answer is: Vancomycin
Question 6
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A 4-year-old male came to the ER with the following symptoms - sudden onset fever of 39oC, sand paper like skin
rash, lymphadenopathy and an inflamed tongue. What is the most probable causative agent?
Select one:
a. Staphylococcus aureus
b. Straphylococcus epidermidis
c. Streptococcus pyogenes 
d. Neisseria meningitidis
The correct answer is: Streptococcus pyogenes
Question 7
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Which statement is TRUE regarding Staph. Toxic Shock Syndrome or TSS?
Select one:
a. Caused by the pyrogenic endotoxin
b. Antibiotic treatment is ineffective since this is toxin mediated
c. Rapidly fatal, leading to cardiac and renal failure in a few hours 
d. Associated with young sexually active females
The correct answer is: Rapidly fatal, leading to cardiac and renal failure in a few hours
Question 8
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What is the basis for the Lancefield grouping of Streptococcus?
Select one:
a. Antibiotic sensitivity
b. Growth on high salt and bile culture medium
c. Presence of specific sugar antigens 
d. Hemolysis pattern on BAP
The correct answer is: Presence of specific sugar antigens
Question 9
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A 20-year-old male came to the ER with a one-day history of purulent discharge from both eyes. On PE, you note
bilateral periorbital swelling and conjunctival redness. He also complains of urethral discharge. Sexual history is
unreliable. Gram stain of the eye discharge would most likely reveal:
Select one:
a. No organism seen on gram stain
b. Yeast cells with hyphal structures
c. Gram negative kidney bean shaped intracellular diplococci 
d. Gram positive cocci in clusters
The correct answer is: Gram negative kidney bean shaped intracellular diplococci
Question 10
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A 78-year-old male was seen in the ER with a 4-day history of productive cough, with fever, chills, malaise and pain on
breathing. CXR shows pneumonia on both lungs. CBC shows WBC count of 17000, predominantly PMNs. Sputum
Grams stain would most likely show:
Select one:
a. No organism seen
b. Gram negative bacilli
c. Yeast cells
d. Gram positive cocci in chains 
The correct answer is: Gram positive cocci in chains
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