Question:
Which structural component of Group A Streptococcus enables its attachment to pharyngeal epithelium by binding to fibronectin?
Which structural component of Group A Streptococcus enables its attachment to pharyngeal epithelium by binding to fibronectin?
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Group A Streptococcus attaches to pharyngeal epithelium using lipoteichoic acid binding to fibronectin.
Updated On: May 14, 2026
- Lipoprotein
- Lipoteichoic acid
- Capsule
- Flagella
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The Correct Option is B
Solution and Explanation
Concept:
Group A Streptococcus adheres to pharyngeal epithelial cells through surface structures. Lipoteichoic acid helps attachment by binding to fibronectin on epithelial cells.
Step 1: Identify organism.
Group A Streptococcus commonly causes pharyngitis.
Step 2: Recall adhesion factor.
The component involved in attachment to pharyngeal epithelium is: \[ \text{Lipoteichoic acid} \]
Step 3: Mechanism.
Lipoteichoic acid binds to fibronectin and helps colonization of the throat.
Step 1: Identify organism.
Group A Streptococcus commonly causes pharyngitis.
Step 2: Recall adhesion factor.
The component involved in attachment to pharyngeal epithelium is: \[ \text{Lipoteichoic acid} \]
Step 3: Mechanism.
Lipoteichoic acid binds to fibronectin and helps colonization of the throat.
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