_http://www.liebertonline.com/doi/abs/10.1089/vbz.2010.0103_
(http://www.liebertonline.com/doi/abs/10.1089/vbz.2010.0103)
Vector-Borne and Zoonotic Diseases
Questing Ticks in Suburban Forest Are Infected by at Least Six
Tick-Borne Pathogens
To cite this article:
Caroline Reis, Martine Cote, Richard E.L. Paul and Sarah Bonnet.
Vector-Borne and Zoonotic Diseases. July 2011, 11(7): 907-916.
doi:10.1089/vbz.2010.0103.
Published in Volume: 11 Issue 7: July 7, 2011
Online Ahead of Print: December 15, 2010
Abstract
The role of Ixodes ricinus ticks in the transmission of pathogens of
public health importance such as Borrelia burgdorferi s.l. is widely
recognized and is suspected in several emerging vector-borne pathogens
in Europe. Here, we assess prevalence rates of several endemic and
emerging zoonotic pathogens in tick populations in an area of high human
population density in France, to contribute to a risk assessment for
potential transmission to humans.
Pathogen prevalence rates were evaluated by polymerase chain reaction
detection and sequencing in questing ticks, individually for adults and
in pools of 10 for nymphs. In addition to finding micro-organisms
corresponding to symbionts, we found high prevalence rates of B.
burgdorferi s.l. (32% of adult females and 10% of nymphs) and low to
moderate ones of Anaplasma phagocytophilum (1%), spotted fever group
Rickettsia spp. (6%), Babesia sp. EU1 (1%), Bartonella birtlesii (0.1%),
and Francisella tularensis (1%).
Our findings extend the knowledge of the geographical distribution of
these endemic and emergent pathogens and support the conclusion that
ticks are important vectors of pathogenic micro-organisms in suburban
forests.
Moreover, tick coinfection with multiple pathogens was found to occur
frequently, which poses a serious challenge for diagnosis and
appropriate treatment. The incrimination of these pathogens in
potentially severe pathologies requires widespread surveillance to
assess the risk of infection, thereby facilitating diagnosis and
treatment, as well as raising local awareness of tick-borne diseases.
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