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Ixodes ricinus

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https://www.readbyqxmd.com/read/28091705/bacteria-of-the-family-candidatus-midichloriaceae-in-sympatric-zones-of-ixodes-ticks-genetic-evidence-for-vertical-transmission
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
https://www.readbyqxmd.com/read/27986081/comparison-of-the-lifetime-host-to-tick-transmission-between-two-strains-of-the-lyme-disease-pathogen-borrelia-afzelii
#11
Maxime Jacquet, Gabriele Margos, Volker Fingerle, Maarten J Voordouw
BACKGROUND: Transmission from the vertebrate host to the arthropod vector is a critical step in the life-cycle of any vector-borne pathogen. How the probability of host-to-vector transmission changes over the duration of the infection is an important predictor of pathogen fitness. The Lyme disease pathogen Borrelia afzelii is transmitted by Ixodes ricinus ticks and establishes a chronic infection inside rodent reservoir hosts. The present study compares the temporal pattern of host-to-tick transmission between two strains of B...
December 16, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27966215/behavioural-responses-of-ixodes-ricinus-nymphs-to-carbon-dioxide-and-rodent-odour
#12
G VAN Duijvendijk, G Gort, H Sprong, W Takken
Many haematophagous ectoparasites use carbon dioxide (CO2 ) and host odour to detect and locate their hosts. The tick Ixodes ricinus (Linnaeus) (Ixodida: Ixodidae) walks only small distances and quests in vegetation until it encounters a host. The differential effects of CO2 and host odour on the host-finding behaviour of I. ricinus have, however, never been clarified and hence represent the subject of this study. The effects of CO2 and odour from bank voles on the activation and attraction of I. ricinus nymphs were analysed in a Y-tube olfactometer...
December 14, 2016: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/27955678/identification-of-ixodes-ricinus-blood-meals-using-an-automated-protocol-with-high-resolution-melting-analysis-hrma-reveals-the-importance-of-domestic-dogs-as-larval-tick-hosts-in-italian-alpine-forests
#13
Margherita Collini, Francesca Albonico, Roberto Rosà, Valentina Tagliapietra, Daniele Arnoldi, Lorenza Conterno, Chiara Rossi, Michele Mortarino, Annapaola Rizzoli, Heidi Christine Hauffe
BACKGROUND: In Europe, Ixodes ricinus L. is the main vector of a variety of zoonotic pathogens, acquired through blood meals taken once per stage from a vertebrate host. Defining the main tick hosts in a given area is important for planning public health interventions; however, until recently, no robust molecular methods existed for blood meal identification from questing ticks. Here we improved the time- and cost-effectiveness of an HRMA protocol for blood meal analysis and used it to identify blood meal sources of sheep tick larvae from Italian alpine forests...
December 12, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27928925/molecular-detection-of-murine-gammaherpesvirus-68-mhv-68-in-haemaphysalis-concinna-ticks-collected-in-slovakia
#14
M Vrbová, P Belvončíková, A Kovaľová, R Matúšková, M Slovák, M Kúdelová
Murine gammaherpesvirus 68 (MHV-68) is a natural pathogen of murid rodents, which serve as hosts to Haemaphysalis concinna ticks. The occurrence of MHV-68 was investigated in a total of 47 H. concinna adult ticks collected on the vegetation in Gabčíkovo, situated in south-western Slovakia (47º54´0´´N, 17º35´0´´E), from May 2013 to May 2014. DNA from ticks was purified and screened by nested PCR targeting ORF50 of MHV-68 and the copy number of virus genome in ticks was determined by a real-time PCR assay specific for ORF65...
2016: Acta Virologica
https://www.readbyqxmd.com/read/27923669/emergence-of-tick-borne-pathogens-borrelia-burgdorferi-sensu-lato-anaplasma-phagocytophilum-ricketsia-raoultii-and-babesia-microti-in-the-kyiv-urban-parks-ukraine
#15
Yuliya M Didyk, Lucia Blaňárová, Svyatoslav Pogrebnyak, Igor Akimov, Branislav Peťko, Bronislava Víchová
To date, only limited data about the presence of ticks and circulation of tick-borne pathogens in urban parks of Kyiv in northern Ukraine are available. In total, 767 ticks (696 Ixodes ricinus and 69 Dermacentor reticulatus) collected in seven urban parks and one suburban oak wood park in Kyiv were individually analyzed by the PCR assays. Tick-borne pathogens, namely spirochetes from Borrelia burgdorferi sensu lato complex, Anaplasma phagocytophilum, and Babesia microti, were detected in 11.1% of tested I. ricinus ticks...
October 11, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27922802/urban-breeding-corvids-as-disseminators-of-ticks-and-emerging-tick-borne-pathogens
#16
Attila D Sándor, Zsuzsa Kalmár, Ioana Matei, Angela Monica Ionică, Ioan-Daniel Mărcuţan
Crows (Corvidae) are common city dwellers worldwide and are increasingly important subjects of epidemiology studies. Although their importance as hosts and transmitters of a number of zoonotic parasites and pathogens is well known, there are no studies on their importance as tick hosts. After mosquitoes, ticks are the most important vectors of zoonotic pathogens, especially for those causing emerging zoonotic diseases. Pathogenic bacteria, especially Borrelia spp., Rickettsia spp., and Anaplasma spp., vectored by ticks, are the cause for most vector-borne diseases in Europe...
December 6, 2016: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/27907193/phylogenetic-lineages-and-postglacial-dispersal-dynamics-characterize-the-genetic-structure-of-the-tick-ixodes-ricinus-in-northwest-europe
#17
Knut H Røed, Kjersti S Kvie, Gunnar Hasle, Lucy Gilbert, Hans Petter Leinaas
Dispersal and gene flow are important mechanisms affecting the dynamics of vectors and their pathogens. Here, patterns of genetic diversity were analyzed in many North European populations of the tick, Ixodes ricinus. Population sites were selected within and between areas separated by geographical barriers in order to evaluate the importance of tick transportation by birds in producing genetic connectivity across open sea and mountain ranges. The phylogenetic analyses of the mitochondrial control region and the cytochrome b gene revealed two distinct clades with supported sub-clades, with three genetic lineages: GB and WNo associated with Great Britain and western Norway respectively, and Eu with a wider distribution across continental Europe in agreement with much lower efficiency of tick dispersal by birds than by large mammals...
2016: PloS One
https://www.readbyqxmd.com/read/27903055/local-landscape-effects-on-population-dynamics-of-ixodes-ricinus
#18
Naveed Asghar, Mona Petersson, Magnus Johansson, Patrik Dinnetz
Ixodes ricinus, a common tick in Europe, transmits severe tickborne pathogens (TBPs). In Sweden, both prevalence and incidence of tick-borne infections have increased during the last few decades, and a majority of the cases is reported from the area around Stockholm. Among ticks, transmission of TBPs involves co-feeding of susceptible larvae or nymphs with infected ticks on the same host. Seasonal synchrony of immature stages and total tick abundance are important factors for the probability of horizontal transmission of TBPs...
November 21, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27894863/molecular-evidence-for-toxoplasma-gondii-in-feeding-and-questing-ixodes-ricinus-ticks
#19
Małgorzata Adamska, Bogumiła Skotarczak
The aim of the present study was to detect Toxoplasma gondii in ticks collected from ponies and field vegetation and to determine the role of Shetland ponies as a potential reservoir host for T. gondii. A total of 1737 feeding Ixodes ricinus collected from 49 horses and 371 questing ticks were tested by PCR and sequencing for the presence and genotyping of T. gondii. All ticks were examined in a previous study to detect and identify pathogenic bacterial species. The aim of this study was also to detect co-infection of ticks with these bacteria and T...
November 21, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27894847/pcr-screening-of-tick-borne-agents-in-sensitive-conservation-areas-southeast-portugal
#20
Maria Margarida Santos-Silva, Pedro Melo, Nuno Santos, Sandra Antunes, Luís Raposo Duarte, Joana Ferrolho, Natacha Milhano, Patrícia Tavares Santos, Ana Domingos, Ana Sofia Santos
The Southeast region of Portugal, particularly the Guadiana valley, is currently the reintroduction territory of Lynx pardinus (Iberian lynx), one of the most endangered felids in the world that is only found in the Iberian Peninsula. Over the last century, populations have declined, placing L. pardinus at extremely high risk of extinction in the wild and relying on reintroduction projects. Among the aspects taken into account in the establishment of new populations is the sanitary status of the selected habitats, especially concerning infectious diseases, including tick-borne pathogens (TBPs)...
November 25, 2016: Molecular and Cellular Probes
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