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Travel Med Infect Dis · Nov 2017
Helminthic infections in returning travelers and migrants with eosinophilia: Diagnostic value of medical history, eosinophil count and IgE.
- Salzer Helmut J F HJF Sections of Infectious Diseases and Tropical Medicine, I. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Ger, Thierry Rolling, Christof D Vinnemeier, Egbert Tannich, Stefan Schmiedel, Marylyn M Addo, and Jakob P Cramer.
- Sections of Infectious Diseases and Tropical Medicine, I. Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Division of Clinical Infectious Diseases and German Center for Infection Research Tuberculosis Unit, Research Center Borstel Borstel, Germany. Electronic address: hsalzer@fz-borstel.de.
- Travel Med Infect Dis. 2017 Nov 1; 20: 49-55.
ObjectivesEosinophilia in travelers and migrants returning from the tropics is often associated with invasive helminthic infections. Total IgE is considered a useful additional diagnostic parameter; however, both parameters are also increased in various other non-helminthic diseases.MethodsWe retrospectively evaluated travelers and migrants seen at our department between September 2007 and May 2014. Patients with an absolute eosinophil count ≥500 cells/μl were considered for further analyses.ResultsAmong 6618 returned travelers and migrants, 154 (2.3%) had a total eosinophil count ≥500 cells/μL. Of these, 71 patients (46%) were diagnosed with helminthic infection. In an additional 62 patients (40%) with eosinophilia a final diagnosis was found, including non-helminthic infections in 34 patients and non-infectious causes in 28 patients, while in 21 patients (14%) no diagnosis was made. Patients with helminthic infections had higher eosinophil counts than travelers and migrants with other diagnoses (median 981 vs. 710 cells/μl; p = 0.001), while total IgE levels (n = 70; 172 vs. 152 kU/l; p = 0.731) were similar in both groups.ConclusionEosinophil count but not total IgE levels are associated with helminthic infections in returning travelers and migrants with eosinophilia. Our results do not support the use of total IgE to differentiate helminthic infections from other causes of eosinophilia in this population.Copyright © 2017 Elsevier Ltd. All rights reserved.
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