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. 2014 Feb;5(1):75-81.
doi: 10.1016/j.ttbdis.2013.08.007. Epub 2013 Nov 15.

Prevalence of tick-borne pathogens in ticks collected from migratory birds in Latvia

Valentina Capligina  1 , Ineta Salmane, Oskars Keišs, Karlis Vilks, Kristine Japina, Viesturs Baumanis, Renate Ranka
Affiliations

Prevalence of tick-borne pathogens in ticks collected from migratory birds in Latvia

Valentina Capligina et al. Ticks Tick Borne Dis. 2014 Feb.

Abstract

Migratory birds act as hosts and long-distance vectors for several tick-borne infectious agents. Here, feeding Ixodes ticks were collected from migratory birds during the autumn migration period in Latvia and screened for the presence of epidemiologically important non-viral pathogens. A total of 93 DNA samples of ticks (37 larvae and 56 nymphs) removed from 41 birds (order Passeriformes, 9 species) was tested for Lyme borreliosis spirochaetes, Anaplasma phagocytophilum, Rickettsia spp., and Babesia spp. Borrelia burgdorferi DNA was detected in 18% of the tick samples, and a majority of infected ticks were from thrush (Turdus spp.) birds. Among the infected ticks, Borrelia valaisiana was detected in 41% of cases, Borrelia garinii in 35%, and mixed Bo. valaisiana and Bo. garinii infection in 24%. Anaplasma phagocytophilum DNA was detected in 2% of ticks, R. helvetica in 12%, and Babesia spp. pathogens in 4% of ticks. Among these samples, 3 Babesia species were identified: Ba. divergens, Ba. microti, and Ba. venatorum. Coinfection with different pathogens that included mixed infections with different Borrelia genospecies was found in 20% of nymphal and 3% of larval Ixodes ticks. These results suggest that migratory birds may support the circulation and spread of medically significant zoonoses in Europe.

Keywords: Birds; Ixodes ticks; Latvia; Tick-borne pathogens.

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