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Ixodes ricinus

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https://www.readbyqxmd.com/read/28238642/detection-of-borrelia-burgdorferi-sensu-lato-and-anaplasma-phagocytophilum-in-questing-ticks-ixodes-ricinus-from-the-czech-republic
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/28119040/ixodes-ricinus-immunogenic-saliva-protein-homologue-to-amblyomma-americanum-av422-determining-its-potential-for-use-in-tick-bite-confirmation
#10
Darko Mihaljica, Dragana Marković, Željko Radulović, Albert Mulenga, Sanja Ćakić, Ratko Sukara, Jelena Samardžić, Snežana Tomanović
Tick bites often go unnoticed, so specific reliable tests are needed to confirm them for prompt diagnosis and treatment of tick-borne diseases. One of the promising candidates for developing such a test is AV422, a tick saliva protein that has been conserved across tick genera. In this study, we demonstrate the potential of the AV422 homologue from Ixodes ricinus to be used for tick bite detection for both Prostriata and Metastriata. We expressed recombinant (r) I. ricinus (Ir) AV422 in E. coli and subjected it to Western blot analysis using rat antibodies to saliva proteins of both I...
January 10, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28091705/bacteria-of-the-family-candidatus-midichloriaceae-in-sympatric-zones-of-ixodes-ticks-genetic-evidence-for-vertical-transmission
#11
Tatyana A Mukhacheva, Sergey Y Kovalev
Ixodes ticks transmit infectious agents and also harbor their own parasites and symbionts. The presumptive endosymbiont of Ixodes ricinus, 'Candidatus Midichloria mitochondrii', has a unique ability to invade mitochondria within tick ovarian cells and is transovarially transmitted with 100% efficiency. A closely related bacterium, provisionally named Montezuma (now 'Candidatus Lariskella arthropodarum'), was isolated from the Ixodes persulcatus ticks and human blood in 2004 as well as from Ixodes pavlovskyi in 2015...
January 14, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28089124/local-scale-spatio-temporal-distribution-of-questing-ixodes-ricinus-l-acari-ixodidae-a-case-study-from-a-riparian-urban-forest-in-wroc%C3%A5-aw-sw-poland
#12
Dorota Kiewra, Ewa Stefańska-Krzaczek, Mariusz Szymanowski, Anna Szczepańska
This paper presents the distribution of questing Ixodes ricinus ticks in suburban forest intensively visited by people. The local-scale observations conducted during a 4-year study at 99 plots (of 100m(2) each) located throughout the entire area of a riparian urban forest, showed a high variation in the density of ticks from year to year. Although I. ricinus is generally permanent in the study area, spatial distribution of sample plots harbouring I. ricinus is variable, i.e. mainly random for adults and larvae, and random or clustered for nymphs...
December 23, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28089123/ticks-and-borrelia-in-urban-and-peri-urban-green-space-habitats-in-a-city-in-southern-england
#13
Kayleigh M Hansford, Manoj Fonville, Emma L Gillingham, Elena Claudia Coipan, Maaike E Pietzsch, Aleksandra I Krawczyk, Alexander G C Vaux, Benjamin Cull, Hein Sprong, Jolyon M Medlock
Ticks are becoming increasingly recognised as important vectors of pathogens in urban and peri-urban areas, including green space used for recreational activities. In the UK, the risk posed by ticks in such areas is largely unknown. In order to begin to assess the risk of ticks in urban/peri-urban areas in southern England, questing ticks were collected from five different habitat types (grassland, hedge, park, woodland and woodland edge) in a city during the spring, summer and autumn of 2013/2014 and screened for Borrelia burgdorferi sensu lato...
December 21, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28073402/deep-sequencing-analysis-of-tick-borne-encephalitis-virus-from-questing-ticks-at-natural-foci-reveals-similarities-between-quasispecies-pools-of-the-virus
#14
Naveed Asghar, John H-O Pettersson, Patrik Dinnetz, Åshild Andreassen, Magnus Johansson
Every year, tick-borne encephalitis virus (TBEV) causes severe central nervous system infection in 10,000 to 15,000 people in Europe and Asia. TBEV is maintained in the environment by an enzootic cycle that requires a tick vector and a vertebrate host, and the adaptation of TBEV to vertebrate and invertebrate environments is essential for TBEV persistence in nature. This adaptation is facilitated by the error-prone nature of the virus' RNA-dependent RNA polymerase that generates genetically distinct virus variants called quasispecies...
January 10, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28065617/borrelia-miyamotoi-in-vectors-and-hosts-in-the-netherlands
#15
Alex Wagemakers, Seta Jahfari, Bob de Wever, Lodewijk Spanjaard, Markus V Starink, Henry J C de Vries, Hein Sprong, Joppe W Hovius
Ixodes ticks transmit Borrelia burgdorferi sensu lato (s.l.), the causative agent of Lyme borreliosis (LB). These tick species also transmit Borrelia miyamotoi, which was recently found to cause infections in humans. We were interested in the prevalence of B. miyamotoi infection in ticks and natural hosts in The Netherlands, and to what extent ticks are co-infected with B. burgdorferi. In addition, erythema migrans has been sporadically described in B. miyamotoi-infected patients, but these skin lesions might as well represent co-infections with B...
December 30, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28063832/the-risk-of-exposure-to-rickettsial-infections-and-human-granulocytic-anaplasmosis-associated-with-ixodes-ricinus-tick-bites-in-humans-in-romania-a-multiannual-study
#16
Ioana Adriana Matei, Zsuzsa Kalmár, Mihaela Lupşe, Gianluca D'Amico, Angela Monica Ionică, Mirabela Oana Dumitrache, Călin Mircea Gherman, Andrei Daniel Mihalca
Anaplasma phagocytophilum and spotted fever group Rickettsia are obligate intracellular Gram-negative tick-borne bacteria, among which several may cause clinical infections in humans. Several Rickettsia spp. and A. phagocytophilum are transmitted in Europe by Ixodes ricinus, the most common tick species feeding on humans in this area. The aim of this study was to evaluate the annual prevalence of Rickettsia spp. and A. phagocytophilum in I. ricinus collected from humans during three consecutive years. The mean prevalences of the infection with the investigated pathogens in I...
December 29, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28054584/inefficient-co-feeding-transmission-of-borrelia-afzelii-in-two-common-european-songbirds
#17
Dieter J A Heylen, Hein Sprong, Aleksandra Krawczyk, Natalie Van Houtte, Dolores Genné, Andrea Gomez-Chamorro, Kees van Oers, Maarten J Voordouw
The spirochete bacterium Borrelia afzelii is the most common cause of Lyme borreliosis in Europe. This tick-borne pathogen can establish systemic infections in rodents but not in birds. However, several field studies have recovered larval Ixodes ricinus ticks infected with B. afzelii from songbirds suggesting successful transmission of B. afzelii. We reviewed the literature to determine which songbird species were the most frequent carriers of B. afzelii-infected I. ricinus larvae and nymphs. We tested experimentally whether B...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28040562/enzootic-origins-for-clinical-manifestations-of-lyme-borreliosis
#18
Setareh Jahfari, Aleksandra Krawczyk, E Claudia Coipan, Manoj Fonville, Joppe W Hovius, Hein Sprong, Katsuhisa Takumi
Both early localized and late disseminated forms of Lyme borreliosis are caused by Borrelia burgdorferi senso lato. Differentiating between the spirochetes that only cause localized skin infection from those that cause disseminated infection, and tracing the group of medically-important spirochetes to a specific vertebrate host species, are two critical issues in disease risk assessment and management. Borrelia burgdorferi senso lato isolates from Lyme borreliosis cases with distinct clinical manifestations (erythema migrans, neuroborreliosis, acrodermatitis chronica atrophicans, and Lyme arthritis) and isolates from Ixodes ricinus ticks feeding on rodents, birds and hedgehogs were typed to the genospecies level by sequencing part of the intergenic spacer region...
December 28, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28017621/occurrence-of-ticks-in-the-subcutaneous-tissue-of-red-foxes-vulpes-vulpes-in-czech-republic-and-romania
#19
G D'Amico, J Juránková, F A Tăbăran, L Frgelecová, P Forejtek, I A Matei, A M Ionică, A Hodžić, D Modrý, A D Mihalca
An extensive survey of parasites in red foxes (Vulpes vulpes) was independently conducted in Romania and the Czech Republic. Carcasses were examined by necropsy, and small, dark nodules apparently containing ticks were noticed in the subcutaneous tissue of several foxes. Histopathological examination was performed using hematoxylin and eosin (HE) staining. Of the 91 foxes examined from the Czech Republic, 14 (15.4%) were harboring ticks in the subcutaneous tissue. In the majority of these cases, 1-3 nodules/fox were found, with a maximum of 31 nodules/fox...
December 9, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27995301/borrelia-miyamotoi-and-co-infection-with-borrelia-afzelii-in-ixodes-ricinus-ticks-and-rodents-from-slovakia
#20
Zuzana Hamšíková, Claudia Coipan, Lenka Mahríková, Lenka Minichová, Hein Sprong, Mária Kazimírová
Borrelia miyamotoi causes relapsing fever in humans. The occurrence of this spirochete has been reported in Ixodes ricinus and wildlife, but there are still gaps in the knowledge of its eco-epidemiology and public health impact. In the current study, questing I. ricinus (nymphs and adults) and skin biopsies from rodents captured in Slovakia were screened for the presence of B. miyamotoi and Borrelia burgdorferi s.l. DNA. The prevalence of B. miyamotoi and B. burgdorferi s.l. in questing ticks was 1.7 and 16...
December 19, 2016: Microbial Ecology
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