The Importance of Ixodes arboricola in Transmission of Rickettsia spp.,Anaplasma phagocytophilum,and Borrelia burgdorferi Sensu Lato in the Czech Republic,Central Europe
Restricted accessResearch articleFirst published online September, 2011
The Importance of Ixodes arboricola in Transmission of Rickettsia spp.,Anaplasma phagocytophilum,and Borrelia burgdorferi Sensu Lato in the Czech Republic,Central Europe
Wild birds are known to be a reservoir of infectious disease agents and disseminatory hosts of ticks. The purpose of this work was to obtain information about the occurrence of rickettsial, anaplasmal, and borrelial infections in some ticks that parasitize wild birds in the Czech Republic. A total of 549 subadult ticks of three species Ixodes arboricola (75.0%), Ixodes ricinus (23.1%), and Haemaphysalis concinna (1.8%) were collected from 20 species of birds (Passeriformes). Rickettsiae were detected in 44.0% larvae and 24.5% nymphs of I. arboricola collected from Parus major, Poecile palustris, and Sitta europaea. Rickettsiae-positive I. ricinus larvae (13.7%) were collected from P. major, Cyanistes caeruleus, and S. europaea, and 2.6% of nymphs from Erithacus rubecula and Prunella modularis. Comparison of sequences of a gltA gene fragment with data available in GenBank identified Rickettsia helvetica, a spotted fever rickettsia associated with human infections, and other Rickettsia spp. Anaplasma phagocytophilum was found only in two I. ricinus nymphs collected from E. rubecula and P. major. Infections with Borrelia burgdorferi sensu lato were recorded in 1.3% larvae of I. arboricola acquired from P. palustris and P. major and in 11.8% larvae and 25.0% nymphs of I. ricinus collected from P. major, P. palustris, C. caeruleus, Acrocephalus schoenobaenus, Turdus merula, Carpodacus erythrinus, Sylvia atricapilla, P. modularis, and Phylloscopus collybita. Reverse-line blot hybridization showed infections with Borrelia garinii and Borrelia valaisiana and mixed infections with these two genospecies. This is the first record of a high rate of rickettsial infection in I. arboricola subadult ticks acquired from birds in the Czech Republic and in central Europe. Our study suggests that I. arboricola, P. major, and P. palustris play important roles in circulating rickettsiae.
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