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Related Experiment Videos

Systemic inflammatory responses in African tick-bite fever.

Mogens Jensenius1, Thor Ueland, Pierre-Edouard Fournier

  • 1Department of Internal Medicine, Aker University Hospital, Oslo, Norway. mogens.jensenius@ioks.uio.no

The Journal of Infectious Diseases
|April 16, 2003
PubMed
Summary

African tick-bite fever (ATBF) in travelers involves elevated inflammatory markers like von Willebrand factor and cytokines. These levels change during illness, suggesting a role in regulating inflammation and immunity.

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Area of Science:

  • Infectious Diseases
  • Immunology
  • Travel Medicine

Background:

  • African tick-bite fever (ATBF) is an emerging rickettsiosis in sub-Saharan Africa.
  • Limited data exists on the inflammatory response in ATBF, particularly in international travelers.

Purpose of the Study:

  • To investigate the inflammatory response in international travelers with ATBF.
  • To analyze plasma/serum levels of specific inflammatory mediators.

Main Methods:

  • Studied 15 patients with travel-associated ATBF and 14 healthy controls.
  • Measured levels of von Willebrand factor (vWF), soluble E-selectin (sE-selectin), and various cytokines/chemokines (TNF-α, IL-6, IFN-γ, IL-10, IL-13, IL-8, RANTES, MIP-1α) at presentation and follow-up.
  • Included C-reactive protein (CRP) as an inflammatory marker.

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Main Results:

  • Patients with ATBF showed increased vWF and sE-selectin levels, which decreased at follow-up.
  • Most cytokines and chemokines (except IFN-γ) were elevated at initial presentation.
  • IL-10 and IL-13 levels tended to rise during follow-up, while other inflammatory cytokines decreased.

Conclusions:

  • The study identified specific inflammatory mediator profiles in ATBF patients.
  • The induction and balance of these mediators are crucial for inflammation regulation and protective immunity in ATBF.
  • Findings contribute to understanding emerging tick-borne diseases in travelers.