Histology is a valuable tool in diagnosing infections. Tissue samples can be stained using various techniques to highlight different cellular components and pathogens. Special stains like Gram stain, PAS stain, and silver stain can be used to identify bacteria, fungi, and parasites, respectively. Immunohistochemistry can detect specific antigens, providing precise identification of pathogens. Electron microscopy can reveal ultrastructural details of pathogens within tissues.