eosinofiilisiä

Eosinophils are a type of white blood cell that play a crucial role in the immune system, particularly in response to parasitic infections and certain allergic reactions. They are characterized by their large, bilobed nucleus and distinctive pink or red granules, which contain enzymes and proteins involved in immune responses. Eosinophils are produced in the bone marrow and circulate in the bloodstream, where they can be found in small numbers under normal conditions. However, their numbers can increase significantly in response to various stimuli, such as parasitic infections, allergic reactions, and certain cancers.

Eosinophils are involved in several immune functions. They can directly kill parasites by releasing toxic substances from their granules. They also produce cytokines, which are signaling molecules that help coordinate the immune response. Eosinophils can also modulate the activity of other immune cells, such as mast cells and basophils, which are involved in allergic reactions. In addition, eosinophils can contribute to tissue repair and remodeling by releasing growth factors and other molecules.

Eosinophilia, an elevated number of eosinophils in the blood, can be a sign of various conditions, including parasitic infections, allergic diseases, and certain cancers. It can also be a side effect of certain medications, such as some antibiotics and antimalarials. Eosinophilia can be diagnosed through a complete blood count (CBC) or other blood tests. Treatment depends on the underlying condition and may include medications to control the immune response or to treat the underlying infection or disease.