What is esinophils?

Eosinophils are a type of white blood cell that is part of the body's immune system. They are produced in the bone marrow and mature in the thymus gland. Eosinophils are found in the blood and tissues, and they play a role in defending the body against allergens, parasites, and infections.

Eosinophils are characterized by their large, eosinophilic granules, which contain a variety of proteins and enzymes that help them to kill parasites and other foreign invaders. Eosinophils also release cytokines, which are small proteins that help to regulate the immune response.

Eosinophils are involved in a variety of immune responses, including:

* Allergic reactions: Eosinophils are released in response to allergens, and they help to produce the symptoms of allergies, such as sneezing, runny nose, and watery eyes.

* Parasitic infections: Eosinophils are effective at killing parasites, such as worms and protozoa.

* Infections: Eosinophils can also be released in response to infections, and they help to clear the infection.

Eosinophilia, or an increased number of eosinophils in the blood, can be a sign of a variety of conditions, including:

* Allergic reactions

* Parasitic infections

* Infections

* Certain types of cancer

* Autoimmune diseases

If you have eosinophilia, your doctor will likely order tests to determine the cause and recommend treatment.