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Ixodes ricinus

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https://www.readbyqxmd.com/read/29432420/in-vitro-studies-of-rickettsia-host-cell-interactions-confocal-laser-scanning-microscopy-of-rickettsia-helvetica-infected-eukaryotic-cell-lines
#1
Stephanie Speck, Tanja Kern, Karin Aistleitner, Meik Dilcher, Gerhard Dobler, Sandra Essbauer
Rickettsia (R.) helvetica is the most prevalent rickettsia found in Ixodes ricinus ticks in Germany. Several studies reported antibodies against R. helvetica up to 12.5% in humans investigated, however, fulminant clinical cases are rare indicating a rather low pathogenicity compared to other rickettsiae. We investigated growth characteristics of R. helvetica isolate AS819 in two different eukaryotic cell lines with focus on ultra-structural changes of host cells during infection determined by confocal laser scanning microscopy...
February 12, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29426591/surveillance-of-british-ticks-an-overview-of-species-records-host-associations-and-new-records-of-ixodes-ricinus-distribution
#2
Benjamin Cull, Maaike E Pietzsch, Kayleigh M Hansford, Emma L Gillingham, Jolyon M Medlock
Public Health England's passive Tick Surveillance Scheme (TSS) records the distribution, seasonality and host associations of ticks submitted from across the United Kingdom (UK), and helps to inform the UK government on emerging tick-borne disease risks. Here we summarise data collected through surveillance during 2010-2016, and compare with previous TSS data from 2005 to 2009, particularly in relation to the primary Lyme borreliosis vector Ixodes ricinus. 4173 records were submitted, constituting >14,000 ticks; 97% were endemic tick records (13,833 ticks of 11 species), with an additional 97 records of imported ticks (438 ticks of 17 species)...
February 3, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29383532/first-report-of-borrelia-miyamotoi-in-an-ixodes-ricinus-tick-in-augsburg-germany
#3
Sharon Page, Christina Daschkin, Sirli Anniko, Viktoria Krey, Carsten Nicolaus, Horst-Guenter Maxeiner
Borrelia miyamotoi, a spirochete found in the hard tick Ixodes ricinus, is thought to cause relapsing fever. The disease caused by this bacterium can manifest with high fever, fatigue and other symptoms. It may also lead to central nervous system involvement with symptoms similar to meningoencephalitis. DNA from ticks from the greater Augsburg region in Germany was subjected to qPCR for Borrelia spp., followed by nested PCR and subsequent sequencing for species identification of the qPCR positive samples. From 112 ticks, 20 were found to be positive for Borrelia...
January 30, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29373306/isolated-populations-of-ixodes-lividus-ticks-in-the-czech-republic-and-belgium-host-genetically-homogeneous-rickettsia-vini
#4
Markéta Nováková, Petr Heneberg, Dieter J A Heylen, Matej Medvecký, Sebastián Muñoz-Leal, David Šmajs, Ivan Literák
In the last two decades, the advent of molecular methods has revealed a remarkable diversity of rickettsiae (Rickettsiales: Rickettsiaceae) in invertebrates. Several species of these obligate intracellular bacteria are known to cause human infections, hence more attention has been directed towards human-biting ectoparasites. A spotted fever group Rickettsia sp. was previously detected in Ixodes lividus ticks (Ixodidae) associated with sand martins (Hirundinidae: Riparia riparia). In order to identify whether this rickettsia varies among isolated tick populations, a total of 1758 I...
January 11, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29352410/first-detection-of-murine-herpesvirus-68-in-adult-ixodes-ricinus-ticks
#5
Marcela Kúdelová, Monika Jánošová, Petra Belvončíková
Murine herpesvirus 68 (MHV-68) is a natural pathogen that infects murid rodents, which serves as hosts for Ixodes ricinus ticks. For the first time, MHV-68 was detected in immature I. ricinus ticks feeding on Lacerta viridis lizards trapped in Slovakia, which supports the idea that ticks can acquire the virus from feeding on infected hosts. The recent discovery of MHV-68 infection and MHV-68 M3 gene transcripts in Dermacentor reticulatus ticks collected in Slovakia also supports this suggestion. Here, for the first time, we report MHV-68 infection, which was detected by nested PCR, in I...
January 19, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29310722/habitat-properties-are-key-drivers-of-borrelia-burgdorferi-s-l-prevalence-in-ixodes-ricinus-populations-of-deciduous-forest-fragments
#6
Steffen Ehrmann, Sanne C Ruyts, Michael Scherer-Lorenzen, Jürgen Bauhus, Jörg Brunet, Sara A O Cousins, Marc Deconchat, Guillaume Decocq, Pieter De Frenne, Pallieter De Smedt, Martin Diekmann, Emilie Gallet-Moron, Stefanie Gärtner, Karin Hansen, Annette Kolb, Jonathan Lenoir, Jessica Lindgren, Tobias Naaf, Taavi Paal, Marcus Panning, Maren Prinz, Alicia Valdés, Kris Verheyen, Monika Wulf, Jaan Liira
BACKGROUND: The tick Ixodes ricinus has considerable impact on the health of humans and other terrestrial animals because it transmits several tick-borne pathogens (TBPs) such as B. burgdorferi (sensu lato), which causes Lyme borreliosis (LB). Small forest patches of agricultural landscapes provide many ecosystem services and also the disservice of LB risk. Biotic interactions and environmental filtering shape tick host communities distinctively between specific regions of Europe, which makes evaluating the dilution effect hypothesis and its influence across various scales challenging...
January 8, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29310697/epidemiology-genetic-variants-and-clinical-course-of-natural-infections-with-anaplasma-phagocytophilum-in-a-dairy-cattle-herd
#7
Cornelia Silaghi, Marion Nieder, Carola Sauter-Louis, Gabriela Knubben-Schweizer, Kurt Pfister, Martin Pfeffer
BACKGROUND: Anaplasma phagocytophilum is an obligate intracellular, tick-transmitted bacterium that causes granulocytic anaplasmosis in humans and several mammalian species including domestic ruminants where it is called tick-borne fever (TBF). Different genetic variants exist but their impact with regard to putative differences in host associations and pathogenicity are not yet completely understood. METHODS: Natural infections with A. phagocytophilum in a dairy cattle herd in Germany were investigated over one pasture season by using serology, haematology, blood chemistry and polymerase chain reaction (PCR)...
January 8, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29297094/evaluation-of-a-semi-automated-in-vitro-feeding-system-for-dermacentor-reticulatus-and-ixodes-ricinus-adults
#8
Bettina Böhme, Christoph Krull, Peter-Henning Clausen, Ard M Nijhof
The long feeding duration of ixodid ticks and need for regular blood changes turns the artificial feeding of ticks into a tedious process. To reduce the number of blood changes, a semi-automated system (SAS) for the artificial feeding of hard ticks was developed and evaluated. It consisted of a glass feeding reservoir that can accommodate six tick feeding chambers. A peristaltic pump was used to pump blood through the feeding reservoir, which was changed once daily. Groups of Dermacentor reticulatus and Ixodes ricinus adults were fed simultaneously in both the SAS and a conventional in vitro feeding system...
January 3, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29290582/prevalence-of-different-rickettsia-spp-in-ixodes-ricinus-and-dermacentor-reticulatus-ticks-acari-ixodidae-in-north-eastern-poland
#9
Joanna Stańczak, Beata Biernat, Maria Racewicz, Marta Zalewska, Anna Matyjasek
In two surveys conducted in April and May 2013, a total of 1148 unfed ticks belonging to two species, Ixodes ricinus and Dermacentor reticulatus, were collected by flagging lower vegetation in 15 different localities throughout the Białowieża Primeval Forest (Podlaskie voivodship; north-eastern Poland) and in its buffer zone. In order to establish their infection rate with Rickettsia spp. individual adult ticks and pooled nymphs were tested by real-time PCR targeting the gltA gene. For the further identification of rickettsial species, positive samples were subjected for nested and semi-nested PCR targeting ompA and 16S rRNA genes, respectively, followed by sequencing analysis...
December 21, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29276701/characterization-of-ixodes-ricinus-fibrinogen-related-proteins-ixoderins-discloses-their-function-in-the-tick-innate-immunity
#10
Helena Honig Mondekova, Radek Sima, Veronika Urbanova, Vojtech Kovar, Ryan O M Rego, Libor Grubhoffer, Petr Kopacek, Ondrej Hajdusek
Ticks are important vectors of serious human and animal disease-causing organisms, but their innate immunity can fight invading pathogens and may have the ability to reduce or block transmission to mammalian hosts. Lectins, sugar-binding proteins, can distinguish between self and non-self-oligosaccharide motifs on pathogen surfaces. Although tick hemolymph possesses strong lectin activity, and several lectins have already been isolated and characterized, little is known about the implementation of these molecules in tick immunity...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29258801/diversity-of-borrelia-spirochetes-and-other-zoonotic-agents-in-ticks-from-kyiv-ukraine
#11
Artem Rogovskyy, Maliha Batool, David C Gillis, Patricia J Holman, Igor V Nebogatkin, Yuliya V Rogovska, Maksym S Rogovskyy
Lyme borreliosis (LB) is caused by tick-borne spirochetes of the Borrelia burgdorferi sensu lato complex. LB is the most prevalent vector-borne illness in Ukraine, but current data on the prevalence of LB pathogens in their tick vector, Ixodes ricinus, are lacking. I. ricinus ticks may also carry Borrelia miyamotoi, an emerging relapsing fever group spirochete that has been implicated in human illness. Despite its zoonotic potential, the prevalence of B. miyamotoi in ticks has not been examined in Ukraine. Similarly, data on the prevalence of other important tick-borne pathogens, Anaplasma phagocytophilum, Babesia spp...
December 15, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29250492/transcriptional-immunoprofiling-at-the-tick-virus-host-interface-during-early-stages-of-tick-borne-encephalitis-virus-transmission
#12
Saravanan Thangamani, Meghan E Hermance, Rodrigo I Santos, Mirko Slovak, Dar Heinze, Steven G Widen, Maria Kazimirova
Emerging and re-emerging diseases transmitted by blood feeding arthropods are significant global public health problems. Ticks transmit the greatest variety of pathogenic microorganisms of any blood feeding arthropod. Infectious agents transmitted by ticks are delivered to the vertebrate host together with saliva at the bite site. Tick salivary glands produce complex cocktails of bioactive molecules that facilitate blood feeding and pathogen transmission by modulating host hemostasis, pain/itch responses, wound healing, and both innate and adaptive immunity...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29239792/francisella-tularensis-and-other-bacteria-in-hares-and-ticks-in-north-rhine-westphalia-germany
#13
Herbert Tomaso, Peter Otto, Martin Peters, Jochen Süss, Axel Karger, Heinz Schamoni, Eric Zuchantke, Helmut Hotzel
Tularemia is a zoonotic disease caused by the bacterium Francisella tularensis. The disease can be transmitted to humans through contact with infected animals such as the European brown hare (Lepus europaeus) and ticks as vectors. The aim of this study was to isolate F. tularensis from ticks and hares in North Rhine-Westphalia using cysteine heart agar to determine their genetic relatedness and to identify other bacteria that grow on this medium. 848 European brown hares and 1556 questing ticks (all Ixodes ricinus) from forests were tested using cultivation and MALDI-TOF mass spectrometry or partial 16S rRNA gene sequencing...
November 21, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29206879/climate-change-influences-on-the-potential-geographic-distribution-of-the-disease-vector-tick-ixodes-ricinus
#14
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
#15
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
#16
REVIEW
K Kubiak, H Sielawa, W Chen, E Dzika
Proposed at the beginning of the twentieth century 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
#17
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
#18
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...
December 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
#19
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
#20
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
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