Eosinophilic asthma is a form of asthma associated with high levels of a white blood cell called eosinophils. In the United States (U.S.), an estimated 25.7 million people have some form of asthma, and 15 percent of these people have severe asthma that is difficult to control with standard medications. Eosinophilic asthma is considered a leading cause of severe asthma, affecting 50 to 60 percent of people with the severe form of the disease. In the population as a whole, eosinophilic asthma is rare, affecting only 5 percent of adults with asthma. Eosinophilic asthma is like other forms of asthma in that people with the condition suffer from inflamed airways, blocked by fluid and mucus and experience spasms that make it difficult to breathe. Unlike other kinds of asthma, however, eosinophilic asthma involves abnormally high levels of a particular type of white blood cell called eosinophils. Eosinophils are part of the immune system and help the body fight off infection. However, high levels of eosinophils can cause inflammation in the airways, affecting the sinuses and nasal passages as well as the lower airways. In general, as the level of eosinophils increases, inflammation and other symptoms of asthma become more severe…. Read full this story
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