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Two fatal tick-borne illnesses, Crimean-Congo hemorrhagic fever and Mediterranean spotted fever, occurred in Greece. Surveillance identified Rhipicephalus sanguineus and Hyalomma marginatum ticks, highlighting potential disease vector roles.

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Area of Science:

  • Medical Entomology
  • Infectious Diseases
  • Public Health

Background:

  • Tick-borne diseases pose significant public health risks.
  • Crimean-Congo hemorrhagic fever (CCHF) and Mediterranean spotted fever (MSF) are serious tick-borne illnesses.
  • Surveillance of tick populations is crucial for understanding disease transmission dynamics.

Purpose of the Study:

  • To identify tick species and their potential roles in human cases of CCHF and MSF in Northeastern Greece.
  • To investigate the association between tick vectors and reported human infections.
  • To explore potential environmental factors influencing tick activity and disease emergence.

Main Methods:

  • Collection and identification of 537 ticks removed from humans presenting with relevant symptoms in Northeastern Greece (June-September 2008).
  • Species identification of collected ticks.
  • Correlation of tick species with reported CCHF and MSF cases.

Main Results:

  • Two fatal cases were reported: one CCHF (first in Greece) and one MSF.
  • Rhipicephalus sanguineus was the predominant tick species (81.5%), a known vector for Rickettsia conorii (MSF).
  • Hyalomma marginatum, the main CCHF virus vector, comprised 5.2% of collected ticks.

Conclusions:

  • The study identified key tick vectors associated with CCHF and MSF in Greece.
  • Rhipicephalus sanguineus dominance suggests a significant role in MSF transmission.
  • Climate and other factors may influence CCHF emergence and vector activity.