Eosinophilic infiltration typically occurs as a response to various stimuli, including parasitic infections, allergens, and certain types of chronic inflammation. The eosinophils are attracted to the site of inflammation by chemotactic factors such as eotaxin and interleukins (IL-5). This infiltration can also be seen in certain diseases such as eosinophilic esophagitis, eosinophilic pneumonia, and some forms of vasculitis.
