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QUESTIONS TO SOLVE MANY STAPHYLOCOCCUS QUESTIONS FOR ANY TYPE OF EXAM TO CLEAR, Cheat Sheet of Microbiology

Gujarat Technological University Microbiology

7 multiple choice question with answers and detail cheat sheet of Staphylococcus to clear any exams

Typology: Cheat Sheet

2024/2025

Available from 05/14/2025

hb14 🇮🇳

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QUESTIONS TO SOLVE MANY

MICROBIOLOGY QUESTIONS FOR

ANY TYPE OF EXAM TO CLEAR

IF YOU CAN SOLVE THIS QUESTION

THAN YOUR POWER TO CLEAR EXAM

IS VERY HIGH BUT IF YOU CANNOT

THEN KINDLY REFER TO SUMMARY

WHICH IS VERY SHORT AND EXAM

FOCUSED

At the end of page answers with solution

present

1. Which of the following tests best differentiates Staphylococcus aureus from other

staphylococci?

A. Catalase test

B. Gram stain

C. Coagulase test

D. Mannitol fermentation

2. Staphylococcus aureus is known for producing all of the following virulence factors

EXCEPT:

A. Protein A

B. Exfoliative toxin

C. Streptolysin O

D. Coagulase

3. Which Staphylococcus species is a common cause of urinary tract infections in young

women?

Partial preview of the text

Download QUESTIONS TO SOLVE MANY STAPHYLOCOCCUS QUESTIONS FOR ANY TYPE OF EXAM TO CLEAR and more Cheat Sheet Microbiology in PDF only on Docsity!

QUESTIONS TO SOLVE MANY

MICROBIOLOGY QUESTIONS FOR

ANY TYPE OF EXAM TO CLEAR

IF YOU CAN SOLVE THIS QUESTION

THAN YOUR POWER TO CLEAR EXAM

IS VERY HIGH BUT IF YOU CANNOT

THEN KINDLY REFER TO SUMMARY

WHICH IS VERY SHORT AND EXAM

FOCUSED

At the end of page answers with solution

present

1. Which of the following tests best differentiates Staphylococcus aureus from other staphylococci? A. Catalase test B. Gram stain C. Coagulase test D. Mannitol fermentation 2. Staphylococcus aureus is known for producing all of the following virulence factors EXCEPT: A. Protein A B. Exfoliative toxin C. Streptolysin O D. Coagulase 3. Which Staphylococcus species is a common cause of urinary tract infections in young women?

A. S. epidermidis B. S. saprophyticus C. S. aureus D. S. haemolyticus

4. Methicillin resistance in Staphylococcus aureus is due to: A. Beta-lactamase production B. Alteration of ribosomal subunits C. Mutation in DNA gyrase D. Altered penicillin-binding protein (PBP2a) 5. What medium is commonly used to isolate and differentiate Staphylococcus aureus****? A. MacConkey agar B. Mannitol Salt Agar C. Blood agar D. Chocolate agar 6. Which of the following is a major cause of prosthetic device infections due to biofilm formation? A. S. aureus B. S. pyogenes C. S. epidermidis D. S. agalactiae 7. Which of the following toxins is responsible for toxic shock syndrome caused by S. aureus****? A. Enterotoxin B. Exfoliative toxin C. TSST- 1 D. Hyaluronidase

! Summary Table: Staphylococcus aureus

Feature Details Introduction - Gram-positive coccus , arranged in grape-like clusters

Facultative anaerobe
Normal flora of skin and nose; opportunistic pathogen
Major cause of hospital- and community-acquired infections Morphology - Gram-positive cocci (~0.5–1.5 μm in diameter)

1 Answer: C. Coagulase test

# S. aureus is coagulase-positive , while other staph species (e.g., S. epidermidis , S.

saprophyticus ) are coagulase-negative.

2 Answer: C. Streptolysin O

# Streptolysin O is produced by Streptococcus pyogenes not S. aureus.

3 Answer: B. S. saprophyticus

$ S. saprophyticus is coagulase-negative and commonly causes UTIs in sexually active young women. 4 Answer: D. Altered penicillin-binding protein (PBP2a)

# MRSA has mecA gene , which produces PBP2a , reducing binding of β-lactam

antibiotics.

5 Answer: B. Mannitol Salt Agar (MSA)

# MSA selects for salt-tolerant staphylococci and differentiates S. aureus (ferments

mannitol → yellow colonies).

6 Answer: C. S. epidermidis

$ S. epidermidis forms biofilms and infects catheters, prosthetic valves, and joints. 7 Answer: C. TSST-1 (Toxic Shock Syndrome Toxin- 1 )

QUESTIONS TO SOLVE MANY STAPHYLOCOCCUS QUESTIONS FOR ANY TYPE OF EXAM TO CLEAR, Cheat Sheet of Microbiology

Related documents

Partial preview of the text

Download QUESTIONS TO SOLVE MANY STAPHYLOCOCCUS QUESTIONS FOR ANY TYPE OF EXAM TO CLEAR and more Cheat Sheet Microbiology in PDF only on Docsity!

QUESTIONS TO SOLVE MANY

MICROBIOLOGY QUESTIONS FOR

ANY TYPE OF EXAM TO CLEAR

IF YOU CAN SOLVE THIS QUESTION

THAN YOUR POWER TO CLEAR EXAM

IS VERY HIGH BUT IF YOU CANNOT

THEN KINDLY REFER TO SUMMARY

WHICH IS VERY SHORT AND EXAM

FOCUSED

At the end of page answers with solution

present

! Summary Table: Staphylococcus aureus

1 Answer: C. Coagulase test

# S. aureus is coagulase-positive , while other staph species (e.g., S. epidermidis , S.

saprophyticus ) are coagulase-negative.

2 Answer: C. Streptolysin O

# Streptolysin O is produced by Streptococcus pyogenes not S. aureus.

3 Answer: B. S. saprophyticus

# MRSA has mecA gene , which produces PBP2a , reducing binding of β-lactam

antibiotics.

5 Answer: B. Mannitol Salt Agar (MSA)

# MSA selects for salt-tolerant staphylococci and differentiates S. aureus (ferments

mannitol → yellow colonies).

6 Answer: C. S. epidermidis

# TSST-1 is a superantigen that leads to massive cytokine release → toxic shock.