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Ixodes ricinus

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https://www.readbyqxmd.com/read/29206879/climate-change-influences-on-the-potential-geographic-distribution-of-the-disease-vector-tick-ixodes-ricinus
#1
Abdelghafar A Alkishe, A Townsend Peterson, Abdallah M Samy
BACKGROUND: Ixodes ricinus is a species of hard tick that transmits several important diseases in Europe and North Africa, including Lyme borreliosis and tick-borne encephalitis. Climate change is affecting the geographic distributions and abundances of arthropod vectors, which in turn influence the geographic distribution and epidemiology of associated vector-borne diseases. To date, few studies have investigated effects of climate change on the spatial distribution of I. ricinus at continental extents...
2017: PloS One
https://www.readbyqxmd.com/read/29196197/behavioral-asymmetries-in-ticks-lateralized-questing-of-ixodes-ricinus-to-a-mechatronic-apparatus-delivering-host-borne-cues
#2
Giovanni Benelli, Donato Romano, Guido Rocchigiani, Alice Caselli, Francesca Mancianti, Angelo Canale, Cesare Stefanini
Ticks are considered among the most dangerous arthropod vectors of disease agents to both humans and animals worldwide. Lateralization contributes to biological fitness in many animals, conferring important functional advantages, therefore studying its role in tick perception would critically improve our knowledge about their host-seeking behavior. In this research, we evaluated if Ixodes ricinus (L.) (Ixodiidae) ticks have a preference in using the right or the left foreleg to climb on a host. We developed a mechatronic device moving a tuft of fox skin with fur as host-mimicking combination of cues...
November 28, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29194776/endosymbiosis-and-its-significance-in-dermatology
#3
REVIEW
Katarzyna Kubiak, Hanna Sielawa, Wenchieh Chen, Ewa Dzika
Proposed at the beginning of the 20th to explain the origin of eukaryotic organelles from prokaryotes, endosymbiosis is now medically defined by various interaction patterns between microorganisms and their residing hosts, best exemplified by the bacterial endosymbiont Wolbachia identified in arthropods and filarial nematodes, which can influence normal development, reproduction, survival, and transmission of the hosts. Based on the transmission modes, vertical or horizontal, and the function of the endosymbionts, the host-symbiont dependence can be divided into primary or secondary...
December 1, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29194726/the-effects-of-acaricide-treatment-of-sheep-on-red-grouse-lagopus-lagopus-scotica-tick-burdens-and-productivity-in-a-multi-host-system
#4
K Fletcher, D Baines
Ixodes ricinus (Ixodida: Ixodidae) ticks are of economic and pathogenic importance across Europe. Within the uplands of the U.K., management to reduce ticks is undertaken to benefit red grouse Lagopus lagopus scotica (Galliformes: Phasianidae). Management strategies focus on the acaricide treatment of domestic sheep Ovis aries (Artiodactyla: Bovidae), but the effectiveness of this is less certain in the presence of wild hosts, particularly red deer Cervus elaphus (Artiodactyla: Cervidae) and mountain hare Lepus timidus (Lagomorpha: Leporidae)...
November 30, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/29189951/ticks-and-bacterial-tick-borne-pathogens-in-piemonte-region-northwest-italy
#5
Dario Pistone, Massimo Pajoro, Eva Novakova, Nadia Vicari, Cesare Gaiardelli, Roberto Viganò, Camilla Luzzago, Matteo Montagna, Paolo Lanfranchi
A molecular screening for tick-borne pathogens was carried out in engorged and in questing ticks collected in Verbano Cusio Ossola county, Piemonte region, Italy. Engorged ticks were removed from wild and domestic animal hosts. The most abundant and common tick species in the area was Ixodes ricinus (192 adults, 907 nymphs). Few individuals of Ixodes hexagonus (15) and Rhipicephalus sanguineus (7) were found among the ticks removed from domestic animals (46 examined ticks). The presence of Rickettsia spp., Borrelia burgdorferi sensu latu, Francisella tularensis and Coxiella burnetii was evaluated by PCR and sequencing in 392 individuals of I...
November 30, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29187292/borrelia-miyamotoi-should-this-pathogen-be-considered-for-the-diagnosis-of-tick-borne-infectious-diseases-in-spain
#6
Ana M Palomar, Aránzazu Portillo, Paula Santibáñez, Sonia Santibáñez, José A Oteo
INTRODUCTION: Borrelia miyamotoi is a tick-borne pathogen belonging to the relapsing fever group. It had not been reported from Spain, but its wide distribution and the presence of the tick-vector (Ixodes ricinus) made us suspect its circulation. The aim of this study was to investigate the presence of Borrelia spp. in I. ricinus in Spain. METHODS: A total of 652 I. ricinus nymphs collected in northern Spain were processed. The DNA was extracted using incubations with ammonium hydroxide...
November 26, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/29181672/seasonal-cycles-of-the-tbe-and-lyme-borreliosis-vector-ixodes-ricinus-modelled-with-time-lagged-and-interval-averaged-predictors
#7
Katharina Brugger, Melanie Walter, Lidia Chitimia-Dobler, Gerhard Dobler, Franz Rubel
Ticks of the species Ixodes ricinus (L.) are the major vectors for tick-borne diseases in Europe. The aim of this study was to quantify the influence of environmental variables on the seasonal cycle of questing I. ricinus. Therefore, an 8-year time series of nymphal I. ricinus flagged at monthly intervals in Haselmühl (Germany) was compiled. For the first time, cross correlation maps were applied to identify optimal associations between observed nymphal I. ricinus densities and time-lagged as well as temporal averaged explanatory variables...
November 27, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29179774/a-10-year-surveillance-of-rickettsiales-rickettsia-spp-and-anaplasma-phagocytophilum-in-the-city-of-hanover-germany-reveals-rickettsia-spp-as-emerging-pathogens-in-ticks
#8
Katrin Blazejak, Elisabeth Janecek, Christina Strube
BACKGROUND: Rickettsiales (Rickettsia spp. and Anaplasma phagocytophilum) transmitted by ticks are considered (re-)emerging pathogens posing a risk to public health. Nevertheless, year-long monitoring studies on prevalences of these pathogens in questing ticks to contribute to public health risk assessment are rare. METHODS: The current study extends previous prevalence surveillances (2005 and 2010) by 2015 to a 10-year monitoring. Therefore, 2100 questing Ixodes ricinus were collected from April to October 2015 at ten different recreation sites in the city of Hanover, Germany, to determine potential changes in tick infection rates with Rickettsiales...
November 28, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29164067/tick-borne-transmission-of-murine-gammaherpesvirus-68
#9
Valeria Hajnická, Marcela Kúdelová, Iveta Štibrániová, Mirko Slovák, Pavlína Bartíková, Zuzana Halásová, Peter Pančík, Petra Belvončíková, Michaela Vrbová, Viera Holíková, Rosemary S Hails, Patricia A Nuttall
Herpesviruses are a large group of DNA viruses infecting mainly vertebrates. Murine gammaherpesvirus 68 (MHV68) is often used as a model in studies of the pathogenesis of clinically important human gammaherpesviruses such as Epstein-Barr virus and Kaposi's sarcoma-associated herpesvirus. This rodent virus appears to be geographically widespread; however, its natural transmission cycle is unknown. Following detection of MHV68 in field-collected ticks, including isolation of the virus from tick salivary glands and ovaries, we investigated whether MHV68 is a tick-borne virus...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29161862/modeling-co-infection-of-ixodes-tick-borne-pathogens
#10
Yijun Lou, Li Liu, Daozhou Gao
Ticks, including the Ixodes ricinus and Ixodes scapularis hard tick species, are regarded as the most common arthropod vectors of both human and animal diseases in Europe and the United States capable of transmitting a large number of bacteria, viruses and parasites. Since ticks in larval and nymphal stages share the same host community which can harbor multiple pathogens, they may be co-infected with two or more pathogens, with a subsequent high likelihood of co-transmission to humans or animals. This paper is devoted to the modeling of co-infection of tick-borne pathogens, with special focus on the co-infection of Borrelia burgdorferi (agent of Lyme disease) and Babesia microti (agent of human babesiosis)...
October 2017: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/29157278/ticks-and-the-city-are-there-any-differences-between-city-parks-and-natural-forests-in-terms-of-tick-abundance-and-prevalence-of-spirochaetes
#11
Maciej Kowalec, Tomasz Szewczyk, Renata Welc-Falęciak, Edward Siński, Grzegorz Karbowiak, Anna Bajer
BACKGROUND: Ixodes ricinus ticks are commonly encountered in either natural or urban areas, contributing to Lyme disease agents Borreliella [(Borrelia burgdorferi (sensu lato)] spp. and Borrelia miyamotoi enzootic cycles in cities. It is an actual problem whether urbanization affects pathogen circulation and therefore risk of infection. The aim of the study was to evaluate main tick-borne disease risk factors in natural, endemic areas of north-east (NE) Poland (Białowieża) and urban areas of central Poland (Warsaw), measuring tick abundance/density, prevalence of infection with spirochaetes and diversity of these pathogens in spring-early summer and late summer-autumn periods between 2012 and 2015...
November 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29156399/saliva-of-ixodes-ricinus-enhances-tbe-virus-replication-in-dendritic-cells-by-modulation-of-pro-survival-akt-pathway
#12
Jaroslava Lieskovská, Jana Páleníková, Helena Langhansová, Jindřich Chmelař, Jan Kopecký
It has been suggested that tick saliva facilitates transmission of tick-borne encephalitis virus (TBEV) to vertebrates. The mechanism of this facilitation has not been elucidated yet. Since dendritic cells (DCs) are among first cells attacked by the virus, we examined the amount of virus and changes induced by saliva in TBEV-infected DCs. We found that virus replication was significantly increased by saliva of Ixodes ricinus tick. Next, saliva-induced enhancement of Akt pathway activation was observed in TBEV-infected DCs...
November 17, 2017: Virology
https://www.readbyqxmd.com/read/29149298/vector-borne-diseases-and-climate-change-a-european-perspective
#13
Jan C Semenza, Jonathan E Suk
Climate change has already impacted the transmission of a wide-range of vector-borne diseases in Europe, and it will continue to do so in the coming decades. Climate change has been implicated in the observed shift of ticks to elevated altitudes and latitudes, notably including the Ixodes ricinus tick species which is a vector for Lyme borreliosis and tick-borne encephalitis. Climate change is also thought to have been a factor in the expansion of other important disease vectors in Europe: Aedes albopictus (the Asian tiger mosquito), which transmits diseases such as Zika, dengue, and chikungunya, and Phlebotomus sandfly species, which transmits diseases including Leishmaniasis...
November 15, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29121976/prevalence-of-tick-borne-pathogens-in-questing-ixodes-ricinus-ticks-in-urban-and-suburban-areas-of-switzerland
#14
Corinne P Oechslin, Daniel Heutschi, Nicole Lenz, Werner Tischhauser, Olivier Péter, Olivier Rais, Christian M Beuret, Stephen L Leib, Sergei Bankoul, Rahel Ackermann-Gäumann
BACKGROUND: Throughout Europe, Ixodes ricinus transmits numerous pathogens. Its widespread distribution is not limited to rural but also includes urbanized areas. To date, comprehensive data on pathogen carrier rates of I. ricinus ticks in urban areas of Switzerland is lacking. RESULTS: Ixodes ricinus ticks sampled at 18 (sub-) urban collection sites throughout Switzerland showed carrier rates of 0% for tick-borne encephalitis virus, 18.0% for Borrelia burgdorferi (sensu lato), 2...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29113783/multiple-legumain-isoenzymes-in-ticks
#15
David Hartmann, Radek Šíma, Jitka Konvičková, Jan Perner, Petr Kopáček, Daniel Sojka
By searching nucleotide databases for the North American Lyme disease vector, Ixodes scapularis, we have complemented the previously characterized European Ixodes ricinus legumain IrAE1 with a full set of nine analogous genes (isae1-9). Six of these were PCR confirmed as genes present in all tick genomes tested. The absolute mRNA copy number examined by quantitative (q)PCR enabled expression profiling and an absolute comparison of mRNA levels for individual I. scapularis (Is)AEs in tick tissues. Four IsAEs (1, 2, 4, 9) were expressed solely in the gut and thus are proposed to be involved in host blood digestion...
November 4, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/29110691/on-the-complexity-of-measuring-forests-microclimate-and-interpreting-its-relevance-in-habitat-ecology-the-example-of-ixodes-ricinus-ticks
#16
Denise Boehnke, Reiner Gebhardt, Trevor Petney, Stefan Norra
BACKGROUND: Ecological field research on the influence of meteorological parameters on a forest inhabiting species is confronted with the complex relations between measured data and the real conditions the species is exposed to. This study highlights this complexity for the example of Ixodes ricinus. This species lives mainly in forest habitats near the ground, but field research on impacts of meteorological conditions on population dynamics is often based on data from nearby official weather stations or occasional in situ measurements...
November 6, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29110169/ticks-acari-ixodidae-infesting-some-small-mammals-from-northern-turkey-with-new-tick-host-associations-and-locality-records
#17
Adem Keskin, Ahmet Yesari Selçuk, Haluk Kefelioğlu
Ticks are obligate ectoparasites of a vast range of terrestrial vertebrates which may play an important role in the transmission of many zoonotic pathogens to humans and animals. In the current study, we performed an investigation on ticks infesting some small mammals captured from Samsun and Tokat provinces, Northern Turkey. One hundred forty-five mammalian samples belonging to four species, namely Cricetulus migratorius (n = 1), Apodemus flavicollis (n = 17), Crocidura suaveolens (n = 102) and Sorex volnuchini (n = 25), were examined for the presence of tick infestations...
November 6, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29110020/granuloma-annulare-and-morphea-correlation-with-borrelia-burgdorferi-infections-and-chlamydia-related-bacteria
#18
Lauri Tolkki, Kati Hokynar, Seppo Meri, Jaana Panelius, Mirja Puolakkainen, Annamari Ranki
A retrospective study of 109 skin biopsies with granuloma annulare (GA) or morphea histology from patients with suspected tick bite was performed. Biopsies were tested for cutaneous Borrelia burgdorferi DNA using PCR. The same biopsies were analysed for tick-borne novel agents, Chlamydia-related bacteria (members of the Chlamydiales order), using a PCR-based method. Borrelia DNA was detected in 7/73 (9.6%) biopsies with GA and in 1/36 (2.8 %) biopsies with morphea, while Chlamydiales DNA was found in 53/73 (72...
November 7, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29103949/association-of-borrelia-and-rickettsia-spp-and-bacterial-loads-in-ixodes-ricinus-ticks
#19
Marie-Kristin Raulf, Daniela Jordan, Volker Fingerle, Christina Strube
In recent years, awareness of coinfections has increased as synergistic or antagonistic effects on interacting bacteria have been observed. To date, several reports on coinfections of ticks with Rickettsia and Borrelia spp. are available. However, associations are rarely described and studies are based on rather low sample sizes. In the present study, coinfections of Ixodes ricinus with these pathogens were investigated by determining their association in a meta-analysis. A total of 5079 tick samples examined for Rickettsia and Borrelia spp...
October 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29089058/a-randomized-controlled-study-to-assess-the-efficacy-and-safety-of-lotilaner-credelio%C3%A2-in-controlling-ticks-in-client-owned-dogs-in-europe
#20
Daniela Cavalleri, Martin Murphy, Wolfgang Seewald, Jason Drake, Steve Nanchen
BACKGROUND: Oral administration of lotilaner flavoured chewable tablets (Credelio™, Elanco) to dogs has been shown to provide a rapid onset of killing activity of infesting ticks, with sustained efficacy for at least 35 days. A study was undertaken in Europe to confirm lotilaner's safety and anti-tick efficacy in client-owned dogs. METHODS: In this assessor-blinded study, dogs were enrolled at 19 clinics in Germany, Hungary and Portugal. Qualifying households with no more than three dogs were randomized in an approximate 2:1 ratio to a lotilaner or fipronil/(S)-methoprene (FSM) (Frontline® Combo Spot-on, Merial) treatment group...
November 1, 2017: Parasites & Vectors
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