Leukocytes are eosinophilic in the midst of an inflammatory reaction and are markers of allergies and parasitic diseases. An increase in eosinophils can be observed during infections, autoimmune processes, parasitosis, and bronchopulmonary diseases.
Eosinofolia is one of the most important inflammatory mechanisms directed against antigens. Eosinophilopenia (decrease in the content of these blood cells) is a consequence of both primary immune deficiency and anemia after infectious diseases, with aplastic anemia.