What Are the Histological Changes in Infected Tissues?

Infected tissues exhibit characteristic histological changes depending on the type of pathogen and the body's immune response. Common histological features include:

Inflammation: The accumulation of immune cells such as neutrophils, macrophages, and lymphocytes is a hallmark of infection.
Necrosis: Cell death due to direct pathogen damage or immune-mediated mechanisms.
Granuloma formation: A chronic inflammatory response often seen in infections like tuberculosis, resulting in a structured mass of immune cells.
Fibrosis: The deposition of collagen and other extracellular matrix components as a result of chronic inflammation.