An increase in eosinophils is associated with which condition?

An increase in eosinophils, a type of white blood cell, is typically associated with asthma. Eosinophils are involved in the body's immune response, particularly in the context of allergic reactions and parasitic infections. In asthma, these cells contribute to inflammation and airway hyper-reactivity, which are hallmark features of the condition. Patients with asthma often experience elevated eosinophil levels due to the chronic inflammatory processes that occur in the airways, leading to symptoms such as wheezing, coughing, and difficulty breathing.

While other conditions can also be associated with an increase in eosinophils, such as bone marrow disorders and certain types of leukemia, asthma is the most common clinical context where eosinophils play a significant and direct role in the disease process.