What does the eos blood count of 1 mean?

An eosinophil count of 1 means that there is 1 eosinophil in 100 white blood cells. Eosinophils are a type of white blood cell that helps the body fight off infection and inflammation. A normal eosinophil count is between 0 and 4 percent of total white blood cells. A count of 1 is within the normal range.

However, a high eosinophil count (eosinophilia) can be a sign of an underlying medical condition, such as an allergic reaction, an infection, or a parasitic infection. If you have an eosinophil count of 1 and you are experiencing any symptoms, such as rash, itching, swelling, or difficulty breathing, it is important to see a doctor to determine the cause.