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https://www.readbyqxmd.com/read/28550059/europe-wide-meta-analysis-of-borrelia-burgdorferi-sensu-lato-prevalence-in-questing-ixodes-ricinus-ticks
#1
Martin Strnad, Václav Hönig, Daniel Růžek, Libor Grubhoffer, Ryan O M Rego
Lyme borreliosis is the most common zoonotic disease transmitted by ticks in Europe and North America. Despite having multiple tick vectors, the causative agent Borrelia burgdorferi sensu lato, is vectored mainly by Ixodes ricinus in Europe. In the present study, we aimed to review and summarize the existing data published from 2010 to 2016 concerning the prevalence of B. burgdorferi s.l. spirochetes in questing I. ricinus The primary focus was to evaluate the infection rate of these bacteria in ticks, accounting for tick stage, adult tick gender, region and detection method, as well as to investigate any changes in prevalence over time...
May 26, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28549720/infection-with-borrelia-chilensis-in-ixodes-stilesi-ticks-collected-from-pudu-puda-deer
#2
Claudio Verdugo, Omar Jiménez, Carlos Hernández, Pedro Álvarez, Angelo Espinoza, Daniel González-Acuña
Lyme borreliosis is a vector-borne zoonosis caused by Borrelia burgdorferi sensu lato species complex spirochetes, which are maintained in transmission cycles among vertebrates and Ixodes ticks. Recently, a new genospecies within this complex, Borrelia chilensis, was described in Ixodes stilesi collected from the environment and from rodents in Chile. This tick also infests the native Southern pudu deer (Pudu puda). The objectives of this study were to investigate the prevalence, intensity of infestation, and aggregation of hard ticks on this deer species, and to determine the presence of borrelial pathogens in the ticks...
May 18, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28549151/borrelia-species-detected-in-ticks-feeding-on-wild-korean-water-deer-hydropotes-inermis-using-molecular-and-genotypic-analyses
#3
D VanBik, S H Lee, M G Seo, B R Jeon, Y K Goo, S J Park, M H Rhee, O D Kwon, T H Kim, P J L Geraldino, D Kwak
Lyme borreliosis is a vector-borne disease transmitted through the bite of ticks infected by Borrelia burgdorferi sensu lato group, including B. burgdorferi sensu stricto, B. afzelii, and B. garinii. The goal of the present study was to detect Borrelia species in ticks infesting wild Korean water deer (KWD; Hydropotes inermis Swinhoe), using molecular and genotypic analyses. In total, 48 ticks were collected from KWD, all of which were morphologically identified as Haemaphysalis longicornis Neumann that is dominant in Korea...
May 26, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28546475/grotenhout-virus-a-novel-nairovirus-found-in-ixodes-ricinus-in-belgium
#4
Bert Vanmechelen, Lies Laenen, Valentijn Vergote, Piet Maes
We report here the draft genome of a novel nairovirus, Grotenhout virus, isolated from deer ticks (Ixodes ricinus) in Belgium. The genome consists of two segments, L and S, and is most similar to the tick-borne South Bay virus, with amino acid identities ranging from 60 to 64%.
May 25, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28545923/seropersistence-of-tbe-virus-antibodies-10-years-after-first-booster-vaccination-and-response-to-a-second-booster-vaccination-with-fsme-immun-0-5ml-in-adults
#5
R Konior, J Brzostek, E M Poellabauer, Q Jiang, L Harper, W Erber
Tick-borne encephalitis (TBE) is a viral disease that can have a severe acute clinical course and considerable long-term morbidity. As there is no causal treatment currently available for TBE, vaccination is the only way to combat the disease in endemic areas. The studies presented here were conducted to obtain prospective long-term TBE serum antibody persistence data of subjects up to 10years after the first booster with FSME-IMMUN. This report presents the results of 2 follow-up studies in the same study population of 315 healthy adults...
May 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28545568/symbiont-dynamics-of-the-tibetan-tick-haemaphysalis-tibetensis-acari-ixodidae
#6
Rongrong Wang, Ningxin Li, Jiannan Liu, Tuo Li, Ming Liu, Zhijun Yu, Jingze Liu
BACKGROUND: Characterization of the microbial diversity and symbiont dynamics of ticks may help to understand the development of ticks and reveal new strategies to control tick-transmitted pathogens, which has not yet been explored in the Tibetan tick Haemaphysalis tibetensis. This tick species is widely distributed in the Tibetan Plateau, and is recognized as one of the primary parasites affecting domestic and wild animals. METHODS: In the present study, the endosymbionts of H...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28545549/detection-and-genetic-characterization-of-a-wide-range-of-infectious-agents-in-ixodes-pavlovskyi-ticks-in-western-siberia-russia
#7
Vera Rar, Natalia Livanova, Sergey Tkachev, Galina Kaverina, Artem Tikunov, Yuliya Sabitova, Yana Igolkina, Victor Panov, Stanislav Livanov, Nataliya Fomenko, Igor Babkin, Nina Tikunova
BACKGROUND: The Ixodes pavlovskyi tick species, a member of the I. persulcatus/I. ricinus group, was discovered in the middle of the 20(th) century in the Russian Far East. Limited data have been reported on the detection of infectious agents in this tick species. The aim of this study was to investigate the prevalence and genetic variability of a wide range of infectious agents in I. pavlovskyi ticks collected in their traditional and recently invaded habitats, the Altai Mountains and Novosibirsk Province, respectively, which are both located within the Western Siberian part of the I...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28545520/the-abundance-of-the-lyme-disease-pathogen-borrelia-afzelii-declines-over-time-in-the-tick-vector-ixodes-ricinus
#8
Maxime Jacquet, Dolores Genné, Alessandro Belli, Elodie Maluenda, Anouk Sarr, Maarten J Voordouw
BACKGROUND: The population dynamics of vector-borne pathogens inside the arthropod vector can have important consequences for vector-to-host transmission. Tick-borne spirochete bacteria of the Borrelia burgdorferi (sensu lato) species complex cause Lyme borreliosis in humans and spend long periods of time (>12 months) in their Ixodes tick vectors. To date, few studies have investigated the dynamics of Borrelia spirochete populations in unfed Ixodes nymphal ticks. METHODS: Larval ticks from our laboratory colony of I...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28544307/afoxolaner-and-fluralaner-treatment-do-not-impact-on-cutaneous-demodex-populations-of-healthy-dogs
#9
Christine M Zewe, Laura Altet, Andrea T H Lam, Lluís Ferrer
BACKGROUND: Fluralaner and afoxolaner are isoxazolines licensed for the treatment of flea and tick infestations. Isoxazolines have also shown efficacy for treatment of demodicosis. Nothing is known about the impact of these compounds on the populations of Demodex in healthy dogs. HYPOTHESIS/OBJECTIVES: The objective of this study was to measure the prevalence of Demodex in the skin of healthy dogs prior to and following the use of either afoxolaner or fluralaner, using real-time PCR (RT-PCR) for Demodex DNA...
May 23, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28544092/fever-and-multiple-eschars-after-an-african-safari-report-of-three-cases
#10
Fátima Albízuri Prado, Alba Sánchez, Marta Feito, Ander Mayor, Ana Rodriguez, Raúl de Lucas
African tick-bite fever (ATBF), a tickborne disease endemic in rural areas of sub-Saharan Africa and the West Indies caused by Rickettsia africae, has been recognized as an emerging health problem in recent years. ATBF has been reported as the second most commonly documented etiology of fever, after malaria, in travelers who return ill from sub-Saharan Africa. Most cases reported in the literature occurred in middle-aged adults, so the incidence of ATBF in children is unclear. We report a cluster of three cases of ATBF that occurred in children ages 7 to 16 years after returning from a game-hunting safari in South Africa...
May 25, 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28541339/clock-is-ticking-for-who-decision-over-taiwan
#11
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
May 19, 2017: Nature
https://www.readbyqxmd.com/read/28540487/importance-of-common-wall-lizards-in-the-transmission-dynamics-of-tick-borne-pathogens-in-the-northern-apennine-mountains-italy
#12
Laura Tomassone, L A Ceballos, C Ragagli, E Martello, R De Sousa, M C Stella, A Mannelli
During the investigations on ticks and tick-borne pathogens (TBP) range expansion in the Northern Apennines, we captured 107 Podarcis muralis lizards. Sixty-eight animals were infested by immature Ixodes ricinus, Haemaphysalis sulcata and H. punctata. Borrelia burgdorferi s.l. was detected in 3.7% of I. ricinus larvae and 8.0% of nymphs. Together with the species-specific B. lusitaniae, we identified B. garinii, B. afzelii and B. valaisiana. Rickettsia spp. (18.1% larvae, 12.0% nymphs), namely R. monacensis, R...
May 24, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28540258/horizontally-acquired-biosynthesis-genes-boost-coxiella-burnetii-s-physiology
#13
Abraham S Moses, Jess A Millar, Matteo Bonazzi, Paul A Beare, Rahul Raghavan
Coxiella burnetii, the etiologic agent of acute Q fever and chronic endocarditis, has a unique biphasic life cycle, which includes a metabolically active intracellular form that occupies a large lysosome-derived acidic vacuole. C. burnetii is the only bacterium known to thrive within such an hostile intracellular niche, and this ability is fundamental to its pathogenicity; however, very little is known about genes that facilitate Coxiella's intracellular growth. Recent studies indicate that C. burnetii evolved from a tick-associated ancestor and that the metabolic capabilities of C...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28540160/necessity-of-a-surveillance-system-for-tick-borne-encephalitis
#14
COMMENT
Seok-Ju Yoo, Ji-Hyuk Park
No abstract text is available yet for this article.
April 2017: Osong Public Health and Research Perspectives
https://www.readbyqxmd.com/read/28539197/candidatus-neoehrlichia-mikurensis-and-borrelia-burgdorferi-sensu-lato-detected-in-the-blood-of-norwegian-patients-with-erythema-migrans
#15
H Quarsten, A Grankvist, L Høyvoll, I B Myre, T Skarpaas, V Kjelland, C Wenneras, S Noraas
The most common tick-borne human disease in Norway is Lyme borreliosis. Ticks in Norway also harbour less known disease-causing agents such as Candidatus Neoehrlichia mikurensis, Borrelia miyamotoi and Rickettsia helvetica. However, human infections caused by these pathogens have never been described in Norway. The main aims of the study were to evaluate the contribution of several tick-borne bacterial agents, other than Borrelia burgdorferi sensu lato, to zoonotic diseases in Norway and to determine their clinical pictures...
May 13, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28536802/molecular-investigations-of-the-bat-tick-argas-vespertilionis-ixodida-argasidae-and-babesia-vesperuginis-apicomplexa-piroplasmida-reflect-bat-connection-between-central-europe-and-central-asia
#16
Sándor Hornok, Krisztina Szőke, Tamás Görföl, Gábor Földvári, Vuong Tan Tu, Nóra Takács, Jenő Kontschán, Attila D Sándor, Péter Estók, Sara Epis, Sándor Boldogh, Dávid Kováts, Yuanzhi Wang
Argas vespertilionis is a geographically widespread haematophagous ectoparasite species of bats in the Old World, with a suspected role in the transmission of Babesia vesperuginis. The aims of the present study were (1) to molecularly screen A. vespertilionis larvae (collected in Europe, Africa and Asia) for the presence of piroplasms, and (2) to analyze mitochondrial markers of A. vespertilionis larvae from Central Asia (Xinjiang Province, Northwestern China) in a phylogeographical context. Out of the 193 DNA extracts from 321 A...
May 23, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28536678/the-role-and-mechanism-of-erythrocyte-invasion-by-francisella-tularensis
#17
Deanna M Schmitt, Rebecca Barnes, Taylor Rogerson, Ashley Haught, Leanne K Mazzella, Matthew Ford, Tricia Gilson, James W-M Birch, Anders Sjöstedt, Douglas S Reed, Jonathan M Franks, Donna B Stolz, James Denvir, Jun Fan, Swanthana Rekulapally, Donald A Primerano, Joseph Horzempa
Francisella tularensis is an extremely virulent bacterium that can be transmitted naturally by blood sucking arthropods. During mammalian infection, F. tularensis infects numerous types of host cells, including erythrocytes. As erythrocytes do not undergo phagocytosis or endocytosis, it remains unknown how F. tularensis invades these cells. Furthermore, the consequence of inhabiting the intracellular space of red blood cells (RBCs) has not been determined. Here, we provide evidence indicating that residing within an erythrocyte enhances the ability of F...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28535905/rickettsia-rickettsii-infecting-rhipicephalus-sanguineus-sensu-latu-latreille-1806-in-high-altitude-atlantic-forest-fragments-ceara-state-brazil
#18
Arannadia Barbosa Silva, Myrian Morato Duarte, Robson da Costa Cavalcante, Stefan Vilges de Oliveira, Vinicius Figueiredo Vizzoni, Ana Íris de Lima Duré, Felipe Campos de Melo Iani, Erik Machado-Ferreira, Gilberto Salles Gazêta
In Brazil, Spotted Fever (SF) is caused by Rickettsia rickettsii and Rickettsia parkeri strain Atlantic Forest. In recent years, several human cases of a milder SF have been reported from the Maciço de Baturité region of Ceará State. Previous studies in this region found R. parkeri strain Atlantic Forest to be present in Rhipicephalus sanguineus sensu lato and Amblyomma ovale ticks. The present study isolated and identified the Rickettsia spp. present in this new endemic area in Brazil. In March 2015, R...
May 20, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28533930/early-onset-lyme-carditis-with-concurrent-disseminated-erythema-migrans
#19
Kinjan P Patel, Peter D Farjo, Joy J Juskowich, Ali Hama Amin, James D Mills
BACKGROUND: Lyme disease is an infection that is estimated to affect over 300,000 people in the United States annually. Typically, it presents with erythema migrans (EM), an annular rash at the site of tick attachment, within 3 to 30 days of inoculation. Untreated patients may progress to early disseminated disease. A further complication, Lyme carditis is rare but may occur several weeks later. It commonly manifests as a variable atrioventricular (AV) conduction block, with a high-grade AV block occurring in only 1% of untreated patients...
2017: American Journal of Cardiovascular Disease
https://www.readbyqxmd.com/read/28532428/practices-of-lyme-disease-diagnosis-and-treatment-by-general-practitioners-in-quebec-2008-2015
#20
Salima Gasmi, Nicholas H Ogden, Patrick A Leighton, Ariane Adam-Poupart, François Milord, L Robbin Lindsay, Sapha Barkati, Karine Thivierge
BACKGROUND: Lyme disease (LD), a multisystem infection caused by the spirochete Borrelia burgdorferi sensu stricto (B. burgdorferi), is the most reported vector-borne disease in North America, and by 2020, 80% of the population in central and eastern Canada could live in LD risk areas. Among the key factors for minimising the impact of LD are the accurate diagnosis and appropriate management of patients bitten by ticks. In this study, the practices of Quebec general practitioners (GPs) on LD diagnosis and management of patients bitten by infected ticks are described...
May 22, 2017: BMC Family Practice
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