Which type of leukocyte is mainly involved in allergic reactions?

Eosinophils play a crucial role in allergic reactions and are primarily involved in responding to allergens. These white blood cells are particularly effective against parasites and also help mediate inflammatory responses during allergic reactions. They release substances like histamines and cytokines that can contribute to the symptoms of allergies, such as asthma and hay fever.

While basophils also have a role in allergic responses, especially through the release of histamine, they are generally present in smaller quantities compared to eosinophils and are not the main type of leukocyte associated with the responsiveness observed in allergic reactions. Neutrophils are primarily involved in responding to infections and do not play a significant role in allergic processes. Lymphocytes are essential for immune responses but tend to be involved more in chronic allergic conditions rather than the immediate allergic response.

Thus, the involvement of eosinophils in the pathology of allergic reactions makes them the primary leukocyte associated with these types of immune responses.