Arneth count is counting of:
Lymphocytes
Lobes in neutrophils
Granules in eosinophils
WBC in bone marrow
Counting the number of neutrophils with different nuclear lobes and expressing the count as percentage of cells with different number of nuclear lobes is called Arneth count. Clinical significance: The Arneth count is useful in judging the rate of formation of neutrophils. Individuals who have a larger percentage of neutrophils with fewer lobes have a left shift which can be indicative of disease processes such as infection, malignant tumors, hemolytic crises, myocardial infarction, acidosis, etc. Individuals with a larger percentage of neutrophils with more lobes have a right shift and most commonly have diseases such as vitamin B12 or folate deficiency, chronic uremia, liver disease, etc Ref: Textbook Of Medical Physiology By Khurana Page 178