Merck Manual

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Professional Version

Overview of Inflammation in Animals

By

Scott H. Edwards

, BVMS, PhD, School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt University

Medically Reviewed Nov 2021 | Modified Nov 2022

Inflammation is the complex pathophysiologic response of vascularized tissue to injury. The injury may result from various stimuli, including thermal, chemical, or physical damage; ischemia; infectious agents; antigen-antibody interactions; and other biologic processes. After tissue injury, the process of tissue healing includes three distinct phases: an inflammatory phase, a repair phase, and a remodeling phase. The desired outcome of the inflammatory response is isolation and elimination of the injurious agent to prepare for the repair of tissue damage at the site of injury and restoration of function. Finally, new tissue formed during the repair phase (eg, scar tissue) may be remodeled over several months.

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