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Eosinophilia is a condition in which the eosinophil count in the peripheral blood exceeds 5 × 10 8 /L (500/μL). [1] Hypereosinophilia is an elevation in an individual's circulating blood eosinophil count above 1.5 × 10 9 /L (i.e. 1,500/μL).
Due to the right-skewed distribution of these counts, median values are more informative than mean values for determining normal levels. Few large-scale studies have reported median blood eosinophil counts, with the median for healthy individuals being 100 cells/μL and the 95th percentile at 420 cells/μL.
The diagnosis of familial eosinophilia rest upon a) familial clustering of the disorder; b) exclusion of "family acquired eosinophilia" (i.e. eosinophilia due to chronic parasite or other infestations that afflict multiple members of a family); c) lack of eosinophil-induced tissue destruction such as that which occurs in the hypereosinophilic ...
Leukocytosis can be subcategorized by the type of white blood cell that is increased in number. Leukocytosis in which neutrophils are elevated is neutrophilia; leukocytosis in which lymphocyte count is elevated is lymphocytosis; leukocytosis in which monocyte count is elevated is monocytosis; and leukocytosis in which eosinophil count is elevated is eosinophilia.
A white blood cell differential is a medical laboratory test that provides information about the types and amounts of white blood cells in a person's blood. The test, which is usually ordered as part of a complete blood count (CBC), measures the amounts of the five normal white blood cell types – neutrophils, lymphocytes, monocytes, eosinophils and basophils – as well as abnormal cell ...
Hypereosinophilic syndrome is a disease characterized by a persistently elevated eosinophil count (≥ 1500 eosinophils/mm³) in the blood for at least six months without any recognizable cause, with involvement of either the heart, nervous system, or bone marrow.
The number of granules in an eosinophil can vary because they have a tendency to degranulate while in the blood stream. [17] Eosinophils play a crucial part in the killing of parasites (e.g., enteric nematodes) because their granules contain a unique, toxic basic protein and cationic protein (e.g., cathepsin [ 14 ] ); [ 18 ] receptors that bind ...
The protein encoded by this gene is the predominant constituent of the crystalline core of the eosinophil granule. High levels of the proform of this protein are also present in placenta and pregnancy serum, where it exists as a complex with several other proteins including pregnancy-associated plasma protein A (), angiotensinogen (), and C3dg.