Discussion
Which of the following microorganism causes lesions in the form of abscesses?
Answer: A
Correct answer: Staphylococcus aureus
The walled-off abscess is the characteristic staphylococcal lesion: coagulase clots the surrounding plasma into a fibrin barrier that keeps phagocytes and antibiotics out while the organism multiplies inside. Streptococcal infection spreads diffusely instead, through tissue planes, because streptokinase and hyaluronidase break down exactly the barriers that staphylococci build.
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