title: Eosinophilia.
abstract: Eosinophilia is defined as elevation of eosinophils in the bloodstream (450-550 cell/μL). There are many reasons for eosinophilia to exist, including parasitic disease, allergic disease, autoimmune, connective tissue disease, rheumatologic disease, primary eosinophilia such as hypereosinophilic syndrome, and as part of a malignant state. Primary care physicians should have an understanding of the variety of diseases or situations that can produce eosinophilia and know in what setting referral to specialty care may be warranted.
authors.affiliation: Allergy and Inflammation, Beth Israel Deaconess Medical Center, Harvard Medical School, One Brookline Place Suite 623, Brookline, MA 02445, USA. Electronic address: akovalsz@bidmc.harvard.edu.
authors.forename: Anna
authors.initials: A
authors.lastname: Kovalszki
authors.affiliation: Allergy and Inflammation, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, CLS Building, Room 943, 330 Brookline Avenue, Boston, MA 02215, USA.
authors.forename: Peter F
authors.initials: PF
authors.lastname: Weller
mesh_terms: D004802:Eosinophilia / Q000175:diagnosis* / Q000209:etiology*; D006403:Hematologic Tests; D006801:Humans; D011320:Primary Health Care; D012017:Referral and Consultation; D012307:Risk Factors
keywords: Asthma; Drug allergy; Eosinophilia; Eosinophilic gastrointestinal disease; Hypereosinophilic syndromes; Parasitic disease