Well, if you had worms, then this can be the cause of eosinopihilia. Treating worms can bring down the eosinophil levels. Other causes of raised eosinophils are asthma, or allergic reactions, and tropical eosinophilia. High eosinophils can cause infiltrates into the lung, and this can make your breathless. Do discuss this with your doctor and get yourself examined. Take care!