Which organism causes lesions called abscesses?

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Abscesses are localized pus-filled lesions formed when neutrophils and bacteria are walled off by tissue, creating a pocket of neutrophil-dominated inflammation and liquefactive necrosis. The classic culprit behind skin and soft-tissue abscesses is Staphylococcus aureus. Its virulence factors, including coagulase and toxins, promote rapid pus formation and tissue destruction, helping the infection to localize into an abscess. The other organisms listed tend to cause different disease patterns: Streptococcus pneumoniae is mainly linked to pneumonia and meningitis; Neisseria gonorrhoeae causes gonorrhea with possible disseminated infection rather than typical abscess formation; Mycobacterium tuberculosis forms granulomatous lesions with caseous necrosis rather than organized abscess cavities. Therefore, Staphylococcus aureus is the organism most closely associated with abscess lesions.