Eosinophil levels are generally low, with most adults having less than 500 cells per μL of blood. When a person’s numbers are unusually low, the doctor may also check other WBC levels. Overall Complete blood count (CBC) In many blood test results, the first list under the “Test Name” column shows the results of the CBC, or complete blood count. The CBC measures the essential Blood tests are also done. Blood tests show that the number of eosinophils in the blood and the erythrocyte sedimentation rate (ESR) are increased. (The ESR is a test for inflammation and measures the rate at which red blood cells settle to the bottom of a test tube containing blood.) These increases indicate inflammation. Full Blood Count (FBC) – this counts the number of each type of blood cell in a sample. There are also different tests that make up a FBC, each of which looks at how many of a particular type of blood cell is present. It also measures how much haemoglobin (Hb) is in the blood. Samples for an FBC are collected in a test tube with a red top. The differential blood test tells doctors how many of each type of white blood cell are in the body. Knowing these levels can help a doctor to diagnose a variety of acute and chronic illnesses. In High Eosinophil Levels : r/medical. As part of my school requirements, I have to take a blood test every year. For the past three years, my eosinophils have been marked as 'high;' Eos% ranged from 5-8% and Eos (Absolute) ranged from 400-600uL. Since the values weren't too high, my doctor didn't recommend anything - only said brush it off (no Table 1: General features of a mature RBC. When a complete blood count is advised, the following tests related to RBCs are done. RBC count, Hematocrit/ Packed cell volume (PCV), Hemoglobin (Hb), Mean corpuscular Volume (MCV), Mean corpuscular haemoglobin (MCH), Mean corpuscular haemoglobin concentration (MCHC), RDW, Reticulocyte count. 5rzLxjT.