What is the primary function of eosinophils?

What is the primary function of eosinophils?

• A. Phagocytosis
• B. Respond to autoimmune reactions
• C. Initiate an immune reaction
• D. Respond to allergic reactions

Answer: (D)

Eosinophils are specialized for dealing with allergic inflammation and parasitic infections. When an allergen triggers an IgE-mediated response, eosinophils are recruited to the site and release granule contents such as major basic protein and eosinophil cationic protein. These substances can help fight parasites but also contribute to tissue damage and the symptoms of allergies, which is why their prominent clinical association is with allergic reactions. While eosinophils can engage in some phagocytosis and participate in broader immune responses, they are not the primary cells responsible for initiating immune reactions or mounting autoimmune responses. Therefore, the option describing a response to allergic reactions best captures their main function.

Eosinophils are specialized for dealing with allergic inflammation and parasitic infections. When an allergen triggers an IgE-mediated response, eosinophils are recruited to the site and release granule contents such as major basic protein and eosinophil cationic protein. These substances can help fight parasites but also contribute to tissue damage and the symptoms of allergies, which is why their prominent clinical association is with allergic reactions. While eosinophils can engage in some phagocytosis and participate in broader immune responses, they are not the primary cells responsible for initiating immune reactions or mounting autoimmune responses. Therefore, the option describing a response to allergic reactions best captures their main function.