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  • An abscess is a localized focus of Supperative Inflammation usually caused by pyogenic bacteria such as Staphylococcus aureus. The abscess usually possesses a central areas of liquifactive necrosis that is composed of dead or dying host cells combined with microbes and microbial debris. An intense ring of neutrophilic inflammation is usually observed around this central necrotic area. Over time fibrosis may begin to surround the abscess in an attempt to quarantine the infection.