Q. What is the primary laboratory test used to differentiate Staphylococcus aureus from other Staphylococcus species?
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A.
Coagulase test
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B.
Catalase test
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C.
Oxidase test
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D.
Fermentation test
Solution
The coagulase test is used to differentiate Staphylococcus aureus from other Staphylococcus species.
Correct Answer:
A
— Coagulase test
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Q. What is the primary mode of transmission for Staphylococcus aureus?
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A.
Airborne
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B.
Direct contact
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C.
Vector-borne
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D.
Fecal-oral
Solution
Staphylococcus aureus is primarily transmitted through direct contact.
Correct Answer:
B
— Direct contact
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Q. What is the primary pathogenic species of Staphylococcus associated with skin infections?
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A.
Staphylococcus epidermidis
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B.
Staphylococcus saprophyticus
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C.
Staphylococcus aureus
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D.
Staphylococcus lugdunensis
Solution
Staphylococcus aureus is the primary pathogenic species associated with skin infections.
Correct Answer:
C
— Staphylococcus aureus
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Q. What is the significance of methicillin-resistant Staphylococcus aureus (MRSA)?
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A.
It is more virulent
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B.
It is resistant to multiple antibiotics
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C.
It causes more skin infections
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D.
It is easier to treat
Solution
MRSA is significant because it is resistant to multiple antibiotics, making it harder to treat.
Correct Answer:
B
— It is resistant to multiple antibiotics
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Q. What type of toxin is produced by some strains of Staphylococcus aureus that can lead to toxic shock syndrome?
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A.
Exfoliative toxin
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B.
Enterotoxin
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C.
Superantigen
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D.
Hemolysin
Solution
Superantigens produced by some strains of Staphylococcus aureus can lead to toxic shock syndrome.
Correct Answer:
C
— Superantigen
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Q. Which of the following conditions is NOT typically caused by Staphylococcus aureus?
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A.
Pneumonia
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B.
Meningitis
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C.
Food poisoning
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D.
Osteomyelitis
Solution
Meningitis is not typically caused by Staphylococcus aureus.
Correct Answer:
B
— Meningitis
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Q. Which of the following is a characteristic feature of Staphylococcus species under the microscope?
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A.
Bacilli shape
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B.
Cocci shape
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C.
Spiral shape
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D.
Filamentous shape
Solution
Staphylococcus species are characterized by their cocci shape.
Correct Answer:
B
— Cocci shape
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Q. Which of the following is a common antibiotic resistance mechanism of Staphylococcus aureus?
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A.
Beta-lactamase production
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B.
Altered ribosomal binding
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C.
Efflux pumps
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D.
All of the above
Solution
Staphylococcus aureus can employ all of these mechanisms to resist antibiotics.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common clinical manifestation of Staphylococcus aureus infection?
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A.
Abscess formation
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B.
Rash
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C.
Diarrhea
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D.
Cough
Solution
Abscess formation is a common clinical manifestation of Staphylococcus aureus infection.
Correct Answer:
A
— Abscess formation
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Q. Which Staphylococcus species is most commonly associated with urinary tract infections?
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A.
Staphylococcus epidermidis
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B.
Staphylococcus saprophyticus
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C.
Staphylococcus aureus
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D.
Staphylococcus hominis
Solution
Staphylococcus saprophyticus is most commonly associated with urinary tract infections.
Correct Answer:
B
— Staphylococcus saprophyticus
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