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Factors Determining Immunological Response to Vaccination against Tick-Borne Encephalitis Virus in Older Individuals
Linköping University, Department of Clinical and Experimental Medicine, Division of Microbiology and Molecular Medicine. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Division of Microbiology and Molecular Medicine. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Division of Microbiology and Molecular Medicine. Linköping University, Faculty of Health Sciences.
County Hospital Ryhov, Sweden .
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2014 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 9, no 6, e0100860- p.Article in journal (Refereed) Published
Abstract [en]

We performed a cross-sectional study including 533 individuals (median age 61) from the highly TBE endemic A land Islands in the archipelago between Sweden and Finland. Blood samples, questionnaires and vaccination records were obtained from all study participants. The aim was to investigate if there was any association between TBEV antibody titer and 12 health-related factors. Measurement of TBEV IgG antibodies was performed using two commercial ELISA assays (Enzygnost and Immunozym), and a third in-house rapid fluorescent focus inhibition test was used to measure TBEV neutralizing antibodies. The age of the individual and the number of vaccine doses were the two most important factors determining the immunological response to vaccination. The response to each vaccine dose declined linearly with increased age. A 35 year age difference corresponds to a vaccine dose increment from 3 to 4 to achieve the same immunological response. Participants previously vaccinated against other flaviviruses had lower odds of being seropositive for neutralizing TBEV antibodies on average, while participants with self-reported asthma had higher odds of being seropositive. By comparing the 3 serological assays we show that the Enzygnost and Immunozym assay differ due to choice of cutoffs, but not in overall accuracy.

Place, publisher, year, edition, pages
Public Library of Science , 2014. Vol. 9, no 6, e0100860- p.
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Clinical Medicine
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URN: urn:nbn:se:liu:diva-109260DOI: 10.1371/journal.pone.0100860ISI: 000338280800075PubMedID: 24967619OAI: oai:DiVA.org:liu-109260DiVA: diva2:737151
Available from: 2014-08-12 Created: 2014-08-11 Last updated: 2017-12-05Bibliographically approved

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Lindblom, PontusWilhelmsson, PeterFryland, LindaSjöwall, JohannaForsberg, PiaLindgren, Per-Eric

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Lindblom, PontusWilhelmsson, PeterFryland, LindaSjöwall, JohannaForsberg, PiaLindgren, Per-Eric
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Division of Microbiology and Molecular MedicineFaculty of Health SciencesDivision of Clinical SciencesDepartment of Infectious Diseases
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