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Ixodes ricinus

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https://www.readbyqxmd.com/read/28340608/molecular-evidence-of-rickettsia-spp-in-ixodid-ticks-and-rodents-in-suburban-natural-and-rural-habitats-in-slovakia
#1
Lenka Minichová, Zuzana Hamšíková, Lenka Mahríková, Mirko Slovák, Elena Kocianová, Mária Kazimírová, Ľudovít Škultéty, Katarína Štefanidesová, Eva Špitalská
BACKGROUND: Natural foci of tick-borne spotted fever group (SFG) rickettsiae of public health concern have been found in Slovakia, but the role of rodents in their circulation is unclear. Ticks (Ixodes ricinus, Ixodes trianguliceps, Dermacentor marginatus, Dermacentor reticulatus, Haemaphysalis concinna and Haemaphysalis inermis) and tissues of rodents (Apodemus flavicollis, Apodemus sylvaticus, Myodes glareolus, Microtus arvalis, Microtus subterraneus and Micromys minutus) were examined for the presence of SFG rickettsiae and Coxiella burnetii by molecular methods...
March 24, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28320640/a-comparative-test-of-ixodid-tick-identification-by-a-network-of-european-researchers
#2
A Estrada-Peña, G D'Amico, A M Palomar, M Dupraz, M Fonville, D Heylen, M A Habela, S Hornok, L Lempereur, M Madder, M S Núncio, D Otranto, M Pfaffle, O Plantard, M M Santos-Silva, H Sprong, Z Vatansever, L Vial, A D Mihalca
This study reports the results of a comparative test of identification of ticks occurring in Western Europe and Northern Africa. A total of 14 laboratories were voluntarily enrolled in the test. Each participant received between 22 and 25 specimens of adult and nymphal ticks of 11 species: Dermacentor marginatus, D. reticulatus, Haemaphysalis punctata, Hyalomma lusitanicum, Hy. marginatum, Ixodes ricinus, I. hexagonus, Rhipicephalus annulatus, R. bursa, R. rossicus, and/or R. sanguineus s.l. Ticks were morphologically identified by three of the co-authors and the identification confirmed by a fourth co-author who used molecular methods based on several genes...
March 8, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28285602/genetic-characterization-of-rhipicephalus-sanguineus-sensu-lato-ticks-from-dogs-in-portugal
#3
Filipe Dantas-Torres, Carla Maia, Maria Stefania Latrofa, Giada Annoscia, Luís Cardoso, Domenico Otranto
BACKGROUND: The taxonomic status of the brown dog tick Rhipicephalus sanguineus (sensu stricto) is a subject of on-going debate; there is a consensus that populations of this tick species should be referred to as R. sanguineus (sensu lato) until its taxonomic status is resolved. Recent genetic studies revealed the existence of more than one lineage of R. sanguineus (s.l.) in temperate countries. In this study, we assessed the genetic identity of ticks collected from rural dogs living in several areas located in all major geographical regions of Portugal...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28285593/the-enzootic-life-cycle-of-borrelia-burgdorferi-sensu-lato-and-tick-borne-rickettsiae-an-epidemiological-study-on-wild-living-small-mammals-and-their-ticks-from-saxony-germany
#4
Anna Obiegala, Nina Król, Carolin Oltersdorf, Julian Nader, Martin Pfeffer
BACKGROUND: Borrelia burgdorferi (sensu lato) and rickettsiae of the spotted fever group are zoonotic tick-borne pathogens. While small mammals are confirmed reservoirs for certain Borrelia spp., little is known about the reservoirs for tick-borne rickettsiae. Between 2012 and 2014, ticks were collected from the vegetation and small mammals which were trapped in Saxony, Germany. DNA extracted from ticks and the small mammals' skin was analyzed for the presence of Rickettsia spp. and B...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28285589/molecular-detection-of-bartonella-henselae-in-11-ixodes-ricinus-ticks-extracted-from-a-single-cat
#5
Yvonne Regier, Wibke Ballhorn, Volkhard A J Kempf
BACKGROUND: Bartonella henselae is a highly prevalent, vector-borne pathogen. Transmission to humans and animals by ticks is discussed controversially. Here, we present a case report, where eleven Ixodes ricinus ticks all harbouring B. henselae DNA were removed from one single cat. RESULTS: The first feeding tick was tested positive for B. henselae DNA. The cat was also found to be seropositive for anti-B. henselae IgG antibodies (titer 1:640). Bartonella henselae was not cultivatable from cat blood...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28276795/influence-of-the-fabric-colour-for-the-ticks-ixodes-ricinus-and-dermacentor-reticulatus-attachment
#6
Anna Szczepańska, Dorota Kiewra, Elżbieta Lonc
No abstract text is available yet for this article.
March 3, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28270232/melting-pot-of-tick-borne-zoonoses-the-european-hedgehog-contributes-to-the-maintenance-of-various-tick-borne-diseases-in-natural-cycles-urban-and-suburban-areas
#7
Setareh Jahfari, Sanne C Ruyts, Ewa Frazer-Mendelewska, Ryanne Jaarsma, Kris Verheyen, Hein Sprong
BACKGROUND: European hedgehogs (Erinaceus europaeus) are urban dwellers and host both Ixodes ricinus and Ixodes hexagonus. These ticks transmit several zoonotic pathogens like Borrelia burgdorferi (sensu lato), Anaplasma phagocytophilum, Rickettsia helvetica, Borrelia miyamotoi and "Candidatus Neoehrlichia mikurensis". It is unclear to what extent hedgehogs in (sub) urban areas contribute to the presence of infected ticks in these areas, which subsequently pose a risk for acquiring a tick-borne disease...
March 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28261565/borrelia-diversity-and-co-infection-with-other-tick-borne-pathogens-in-ticks
#8
Cristian Raileanu, Sara Moutailler, Ionuţ Pavel, Daniela Porea, Andrei D Mihalca, Gheorghe Savuta, Muriel Vayssier-Taussat
Identifying Borrelia burgdorferi as the causative agent of Lyme disease in 1981 was a watershed moment in understanding the major impact that tick-borne zoonoses can have on public health worldwide, particularly in Europe and the USA. The medical importance of tick-borne diseases has long since been acknowledged, yet little is known regarding the occurrence of emerging tick-borne pathogens such as Borrelia spp., Anaplasma phagocytophilum, Rickettsia spp., Bartonella spp., "Candidatus Neoehrlichia mikurensis", and tick-borne encephalitis virus in questing ticks in Romania, a gateway into Europe...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28257433/a-comparison-of-nonlinear-mixed-models-and-response-to-selection-of-tick-infestation-on-lambs
#9
Panya Sae-Lim, Lise Grøva, Ingrid Olesen, Luis Varona
Tick-borne fever (TBF) is stated as one of the main disease challenges in Norwegian sheep farming during the grazing season. TBF is caused by the bacterium Anaplasma phagocytophilum that is transmitted by the tick Ixodes ricinus. A sustainable strategy to control tick-infestation is to breed for genetically robust animals. In order to use selection to genetically improve traits we need reliable estimates of genetic parameters. The standard procedures for estimating variance components assume a Gaussian distribution of the data...
2017: PloS One
https://www.readbyqxmd.com/read/28255923/transmission-differentials-for-multiple-pathogens-as-inferred-from-their-prevalence-in-larva-nymph-and-adult%C3%A2-of-ixodes-ricinus-acari-ixodidae
#10
Per M Jensen, Christian S Christoffersen, Sara Moutailler, Lorraine Michelet, Kirstine Klitgaard, Rene Bødker
Ixodes ricinus serves as vector for a range of microorganisms capable of causing clinical illness in humans. The microorganisms occur in the same vector populations and are generally affected by the same tick-host interactions. Still, the instars have different host preferences which should manifest in different transmission patterns for various microorganisms in the tick populations, i.e., most microorganisms increase in prevalence rate from larvae to nymphs because their reservoirs are among small mammals and birds that serve as blood hosts for larvae...
March 2, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28248955/first-identification-of-rickettsia-helvetica-in-questing-ticks-from-a-french-northern-brittany-forest
#11
Sarah I Bonnet, Richard E L Paul, Emmanuel Bischoff, Martine Cote, Evelyne Le Naour
Tick-borne rickettsiae are considered to be emerging, but data about their presence in western Europe are scarce. Ixodes ricinus ticks, the most abundant and widespread tick species in western Europe, were collected and tested for the presence of several tick-borne pathogens in western France, a region never previously explored in this context. There was a high tick abundance with a mean of 4 females, 4.5 males, and 23.3 nymphs collected per hour per collector. Out of 622 tested ticks, specific PCR amplification showed the presence of tick symbionts as well as low prevalence of Borrelia burgdorferi (0...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28238642/detection-of-borrelia-burgdorferi-sensu-lato-and-anaplasma-phagocytophilum-in-questing-ticks-ixodes-ricinus-from-the-czech-republic
#12
Kateřina Kybicová, Kateřina Baštová, Marek Malý
The aim of the present study is to compare the prevalence of Borrelia burgdorferi sensu lato (s.l.) and Anaplasma phagocytophilum in questing ticks by using molecular methods from spring to autumn 2007. A total of 526 Ixodes ricinus ticks were collected from vegetation in three different sampling sites, representing an urban area (city park), a suburban area (village) and a natural montane habitat. The prevalence of B. burgdorferi s.l. was 17.3% (7.5% in males, 18.7% in females and 20.2% in nymphs), while 4...
February 20, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28202075/tick-borne-pathogens-induce-differential-expression-of-genes-promoting-cell-survival-and-host-resistance-in-ixodes-ricinus-cells
#13
Karen L Mansfield, Charlotte Cook, Richard J Ellis, Lesley Bell-Sakyi, Nicholas Johnson, Pilar Alberdi, José de la Fuente, Anthony R Fooks
BACKGROUND: There has been an emergence and expansion of tick-borne diseases in Europe, Asia and North America in recent years, including Lyme disease, tick-borne encephalitis and human anaplasmosis. The primary vectors implicated are hard ticks of the genus Ixodes. Although much is known about the host response to these bacterial and viral pathogens, there is limited knowledge of the cellular responses to infection within the tick vector. The bacterium Anaplasma phagocytophilum is able to bypass apoptotic processes in ticks, enabling infection to proceed...
February 15, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28188085/species-of-ticks-and-carried-pathogens-in-owned-dogs-in-spain-results-of-a-one-year-national-survey
#14
Agustín Estrada-Peña, Xavier Roura, Angel Sainz, Guadalupe Miró, Laia Solano-Gallego
This study presents the results of a national survey in Spain on the distribution of ticks on owned dogs, their phenology and the associated pathogens over one year. In the study, 1628 adult ticks were collected on 660 dogs presented to 26 veterinary practices, of which 507 dogs (76.8%) carried at least one adult tick. The primary species of ticks were Rhipicephalus sanguineus s.l. (53%), Dermacentor reticulatus (9%), Ixodes ricinus (9%), and I. hexagonus (4%). Parasitism by two species of these ticks was rare...
February 3, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28179027/genome-scaffolding-and-annotation-for-the-pathogen-vector-ixodes-ricinus-by-ultra-long-single-molecule-sequencing
#15
Wibke J Cramaro, Oliver E Hunewald, Lesley Bell-Sakyi, Claude P Muller
BACKGROUND: Global warming and other ecological changes have facilitated the expansion of Ixodes ricinus tick populations. Ixodes ricinus is the most important carrier of vector-borne pathogens in Europe, transmitting viruses, protozoa and bacteria, in particular Borrelia burgdorferi (sensu lato), the causative agent of Lyme borreliosis, the most prevalent vector-borne disease in humans in the Northern hemisphere. To faster control this disease vector, a better understanding of the I...
February 8, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28169171/seasonal-infestation-of-birds-with-immature-stages-of-ixodes-ricinus-and-ixodes-arboricola
#16
Elena Kocianová, Veronika Rusňáková Tarageľová, Danka Haruštiaková, Eva Špitalská
This study assessed the parasitization of cavity-nesting birds and ground-nesting/foraging birds with larvae and nymphs of two Ixodes species, Ixodes ricinus and Ixodes arboricola. Totals of 679 (52.3%) I. ricinus and 619 (47.7%) I. arboricola ticks were collected from 15 species of passerine birds which were caught during the nesting and non-nesting periods of 2003-2006, in the south-eastern part of the Czech Republic, the Drahanská Vrchovina Uplands. In the non-nesting period from October to March, 6.8% (101/1492) of birds were infested with ticks, mainly with I...
January 29, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28161419/control-of-infestations-by-ixodes-ricinus-tick-larvae-in-rabbits-vaccinated-with-aquaporin-recombinant-antigens
#17
Marinela Contreras, José de la Fuente
BACKGROUND: Tick-borne diseases greatly impact human and animal health worldwide, and vaccines are an environmentally friendly alternative to acaricides for their control. Recent results have suggested that aquaporin (AQP) water channels have a key function during tick feeding and development, and constitute good candidate antigens for the control of tick infestations. METHODS: Here we describe the effect of vaccination with the Ixodes ricinus AQP1 (IrAQP) and a tick AQP conserved region (CoAQP) on I...
February 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28152581/bridging-of-cryptic-borrelia-cycles-in-european-songbirds
#18
Dieter Heylen, Aleksandra Krawczyk, Isabel Lopes de Carvalho, Maria Sofia Núncio, Hein Sprong, Ana Cláudia Norte
The principal European vector for Borrelia burgdorferi s.l., the causative agents of Lyme disease, is the host-generalist tick Ixodes ricinus. Almost all terrestrial host-specialist ticks have been supposed not to contribute to the terrestrial Borrelia transmission cycles. Through an experiment with blackbirds, we show successful transmission by the widespread I. frontalis, an abundant bird-specialized tick that infests a broad range of songbirds. In the first phase of the experiment, we obtained Borrelia-infected I...
February 2, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28127642/influence-of-the-spatial-heterogeneity-in-tick-abundance-in-the-modeling-of-the-seasonal-activity-of-ixodes-ricinus-nymphs-in-western-europe
#19
Julie Cat, Frédéric Beugnet, Thierry Hoch, Frans Jongejan, Aurélie Prangé, Karine Chalvet-Monfray
The seasonal weather-driven activity of the tick Ixodes ricinus is frequently explored using multisite surveys. This study aimed to investigate the statistical modeling of seasonal trends in the activity of I. ricinus nymphs when both the influence of abiotic factors and spatial heterogeneity were taken into account. Time series data of abiotic covariates (temperature, relative humidity, rainfall and photoperiod) and nymphal tick counts were recorded on several sites in The Netherlands, Belgium and in France in 2008 and 2009...
January 26, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28124749/ixodid-ticks-parasitizing-wild-carnivores-in-romania
#20
Gianluca D'Amico, Mirabela Oana Dumitrache, Ioana Adriana Matei, Angela Monica Ionică, Călin Mircea Gherman, Attila David Sándor, David Modrý, Andrei Daniel Mihalca
In Romania, data regarding hard-tick diversity and tick-host associations in wild carnivores are scarce. We aimed to identify tick species in wild carnivores and to establish reliable data on tick-host associations. The study was conducted in various Romanian localities from all five ecoregions found in the country. Fourteen species of wild carnivores were examined. Immature and adult ticks were collected and identified using the morphological keys. The frequency and mean intensity of tick infestation, overall and differentiated by species, developmental stage and host were calculated...
January 26, 2017: Experimental & Applied Acarology
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