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Risk for human tick-borne encephalitis, borrelioses, and double infection in the pre-Ural region of Russia

E I Korenberg1, L Y Gorban, Y V Kovalevskii

  • 1Gamaleya Research Institute for Epidemiology and Microbiology, Russian Academy of Medical Sciences, Moscow, Russia.

Emerging Infectious Diseases
|June 1, 2001
PubMed

Insights

This study investigated tick-borne encephalitis (TBE) and borrelioses risk in Perm, Russia. TBE virus and Borrelia bacteria were found to coexist in Ixodes persulcatus ticks, indicating potential for co-infection.

Area of Science:

  • * Veterinary Entomology
  • * Infectious Diseases Epidemiology
  • * Medical Zoology

Background:

  • * Perm, Russia, exhibits high incidence rates of tick-borne diseases.
  • * Ixodid ticks are vectors for serious human pathogens, including TBE virus and Borrelia species.
  • * Understanding co-infection risks is crucial for public health management.

Purpose of the Study:

  • * To assess the risk of tick-borne encephalitis (TBE), borrelioses, and co-infections in Perm, Russia.
  • * To investigate the presence and potential coexistence of TBE virus and Borrelia in Ixodes persulcatus ticks.

Main Methods:

  • * Analysis of 3,473 unfed adult Ixodes persulcatus ticks collected from natural foci.
  • * Examination of 62,816 ticks removed from human hosts between 1994 and 1998.
  • * Detection of TBE virus and Borrelia spp. in tick populations.

Main Results:

  • * Ixodes persulcatus ticks collected in Perm were found to harbor TBE virus and Borrelia.
  • * Evidence suggests the potential for simultaneous presence of TBE virus and Borrelia within individual ticks.
  • * The study period (1994-1998) highlights ongoing public health concerns in the region.

Conclusions:

  • * Co-circulation of TBE virus and Borrelia in tick populations poses a significant risk for human co-infection.
  • * Ixodes persulcatus ticks in Perm are confirmed vectors for both TBE and borrelioses.
  • * Public health strategies should consider the dual threat of these tick-borne pathogens.

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