Natural hybridization of the ticks Ixodes persulcatus and Ixodes pavlovskyi in their sympatric populations in Western Siberia

Kovalev, Sergey Y.; Mikhaylishcheva, Maria S.; Mukhacheva, Tatyana A.

doi:10.1016/j.meegid.2015.04.003

Cited by 44 publications

(34 citation statements)

References 24 publications

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“…In the suburbs of Novosibirsk, I. pavlovskyi ticks became more abundant only during this century and their proportion among the captured ticks varied from 3 to 94% in different locations [35, 58, 62]. Notably, the existence of I. pavlovskyi / I. persulcatus natural hybrids was previously shown [61]. To exclude possible hybrids, each adult tick was characterized using both morphological and genetic criteria, and all intermediate morphological forms and genetic crosses were excluded from this study.…”

Section: Discussionmentioning

confidence: 99%

“…However, I. persulcatus adults feed on large and medium-sized wild mammals and livestock, while I. pavlovskyi adults feed on birds that collect food from the ground and have been found to feed on the European hedgehog ( Erinaceus europaeus ), the mountain hare ( Lepus timidus ), and the red squirrel ( Sciurus vulgaris ) [59, 60]. Notably, natural hybridization between I. pavlovskyi and I. persulcatus ticks in their sympatric populations in Western Siberia has been described [61]. From the beginning of this century, an increased abundance of I. pavlovskyi ticks has been recorded more northward in Western Siberia in parks and suburban areas of Novosibirsk and Tomsk, large Siberian cities situated in the Western Siberian Plain.…”

Section: Introductionmentioning

confidence: 99%

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Detection and genetic characterization of a wide range of infectious agents in Ixodes pavlovskyi ticks in Western Siberia, Russia

et al. 2017

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BackgroundThe Ixodes pavlovskyi tick species, a member of the I. persulcatus/I. ricinus group, was discovered in the middle of the 20th century in the Russian Far East. Limited data have been reported on the detection of infectious agents in this tick species. The aim of this study was to investigate the prevalence and genetic variability of a wide range of infectious agents in I. pavlovskyi ticks collected in their traditional and recently invaded habitats, the Altai Mountains and Novosibirsk Province, respectively, which are both located within the Western Siberian part of the I. pavlovskyi distribution area.ResultsThis study reports the novel discovery of Borrelia bavariensis, Rickettsia helvetica, R. heilongjiangensis, R. raoultii, “Candidatus Rickettsia tarasevichiae”, Anaplasma phagocytophilum, Ehrlichia muris, “Candidatus Neoehrlichia mikurensis” and Babesia microti in I. pavlovskyi ticks. In addition, we confirmed the previous identification of B. afzelii, B. garinii and B. miyamotoi, as well as tick-borne encephalitis and Kemerovo viruses in this tick species. The prevalence and some genetic characteristics of all of the tested agents were compared with those found in I. persulcatus ticks that were collected at the same time in the same locations, where these tick species occur in sympatry. It was shown that the prevalence and genotypes of many of the identified pathogens did not significantly differ between I. pavlovskyi and I. persulcatus ticks. However, I. pavlovskyi ticks were significantly more often infected by B. garinii and less often by B. bavariensis, B. afzelii, “Ca. R. tarasevichiae”, and E. muris than I. persulcatus ticks in both studied regions. Moreover, new genetic variants of B. burgdorferi (sensu lato) and Rickettsia spp. as well as tick-borne encephalitis and Kemerovo viruses were found in both I. pavlovskyi and I. persulcatus ticks.ConclusionAlmost all pathogens that were previously detected in I. persulcatus ticks were identified in I. pavlovskyi ticks; however, the distribution of species belonging to the B. burgdorferi (sensu lato) complex, the genus Rickettsia, and the family Anaplasmataceae was different between the two tick species. Several new genetic variants of viral and bacterial agents were identified in I. pavlovskyi and I. persulcatus ticks.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection and genetic characterization of a wide range of infectious agents in Ixodes pavlovskyi ticks in Western Siberia, Russia

et al. 2017

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“…In such overlapping zones crossspecies mating occurs, leading to hybrid offspring that likely possess phenotypic traits of both parents. Cross-mating has not only observed between I. ricinus and I. persulcatus but also between I. persulcatus and I. pavlovskyi (Balashov Iu et al, 1998; and references therein Kovalev et al, 2015Kovalev et al, , 2016 and between I. scapularis and I. cookei in North America (Patterson et al, 2017) suggesting that cross-mating between tick species may be more frequent than once thought.…”

Section: Hybrid Ticks?mentioning

confidence: 99%

Borrelia bavariensis: Vector Switch, Niche Invasion, and Geographical Spread of a Tick-Borne Bacterial Parasite

Margos¹,

Fingerle²,

Reynolds

2019

Front. Ecol. Evol.

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The Borrelia burgdorferi sensu lato species complex currently consists of more than 20 species that utilize small vertebrate hosts as reservoirs and ticks of the genus Ixodes as vectors. The bacterial parasite species differ in their ecology (reservoir hosts, competent vectors) as well as geographical distribution. Several studies have defined reservoir host association as a driver for diversification, speciation and pattern of spatial occurrence of populations but in this review we focus on vector association and its role in diversification and speciation of Borrelia. Borrelia bavariensis, a member of the species complex, uses small mammals as reservoir hosts and can cause Lyme borreliosis in humans. Phylogeographic analysis employing both genetic and genomic data shows that this species has undergone a recent range expansion, invading Europe from its probable original range in Asia while undergoing a drastic genetic bottleneck, suggesting that the colonization of Europe was a single event. We hypothesize that this invasion-like range expansion coincided with a change in the parasite's tick vector, switching from Ixodes persulcatus in Asia to I. ricinus in Europe. Making extensive use of the ecological concept of niche, we discuss the importance of host and vector associations in defining spatial range and their possible role in speciation in the B. burgdorferi sensu lato species complex.

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“…specific (Kiszewski et al 2001) and cases of hybridization between different Ixodes species have been well documented (Balashov et al 1998;Kovalev et al 2015Kovalev et al , 2016. In laboratory studies, pairwise combinations between I. scapularis, I. pacificus, Ixodes ricinus (L., 1758) (the castor bean tick or sheep tick), and Ixodes persulcatus (Schulze, 1930) (the taiga tick) mated readily, showing no differences in the initiation time, frequency or duration of mating between intra-and inter-species pairings, and all pairings produced hybrids (Balashov et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Evidence for genetic hybridization betweenIxodes scapularisandIxodes cookei

et al. 2017

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Ixodes scapularis Say, 1821 (the black-legged tick) is becoming established in Canada. The northwards expansion of I. scapularis leads to contact between I. scapularis and Ixodes cookei Packard, 1869, a well-established tick species in Eastern Canada. Examination of I. cookei and I. scapularis collected from New Brunswick revealed ticks with ambiguous morphologies, with either a mixture or intermediate traits typical of I. scapularis and I. cookei, including in characteristics typically used as species identifiers. Genetic analysis to determine if these ticks represent hybrids revealed that four had I. cookei derived mitochondrial DNA but I. scapularis nuclear DNA. In one case, the nuclear sequence showed evidence of heterozygosity for I. scapularis and I. cookei sequences, whereas in the others, the nuclear DNA appeared to be entirely derived from I. scapularis. These data strongly suggest genetic hybridization between these two species. Ixodes cookei and hybrid ticks were readily collected from humans and companion animals and specimens infected with Borrelia burgdorferi Johnson et al., 1984, the causative agent of Lyme disease, were identified. These findings raise the issue of genetic introgression of I. scapularis genes into I. cookei and warrant reassessment of the capacity of I. cookei and I. cookei × I. scapularis hybrids to vector Borrelia infection.

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Natural hybridization of the ticks Ixodes persulcatus and Ixodes pavlovskyi in their sympatric populations in Western Siberia

Cited by 44 publications

References 24 publications

Detection and genetic characterization of a wide range of infectious agents in Ixodes pavlovskyi ticks in Western Siberia, Russia

Detection and genetic characterization of a wide range of infectious agents in Ixodes pavlovskyi ticks in Western Siberia, Russia

Borrelia bavariensis: Vector Switch, Niche Invasion, and Geographical Spread of a Tick-Borne Bacterial Parasite

Evidence for genetic hybridization betweenIxodes scapularisandIxodes cookei

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