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Ticks and Tick-borne Diseases

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https://www.readbyqxmd.com/read/29329785/a-relapsing-fever-group-borrelia-sp-is-widely-distributed-among-wild-deer-in-japan
#1
Yumi Kumagai, Kozue Sato, Kyle R Taylor, Aya Zamoto-Niikura, Koichi Imaoka, Shigeru Morikawa, Makoto Ohnishi, Hiroki Kawabata
A relapsing fever group Borrelia sp. was detected from the blood of wild deer (Cervus nippon) in Japan. The Borrelia sp. was distributed nationwide among deer with an overall prevalence of 26% in blood samples. The prevalence of infection was significantly higher in fawns (48.4%) compared to adult deer (23.6%). Sequencing analysis reveals that this Borrelia sp. belongs to the hard tick-borne relapsing fever borreliae, and that it forms a single lineage based on sequences of the flagellin and glycerophosphodiester phosphodiesterase genes...
December 28, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29307783/prevalence-risk-factors-and-genetic-diversity-of-veterinary-important-tick-borne-pathogens-in-cattle-from-rhipicephalus-microplus-invaded-and-non-invaded-areas-of-benin
#2
Paul Franck Adjou Moumouni, Gilbert Luc Aplogan, Hirotaka Katahira, Yang Gao, Huanping Guo, Artemis Efstratiou, Charoonluk Jirapattharasate, Guanbo Wang, Mingming Liu, Aaron Edmond Ringo, Rika Umemiya-Shirafuji, Hiroshi Suzuki, Xuenan Xuan
Babesiosis, theileriosis, anaplasmosis, and heartwater are tick-borne diseases (TBD) that threaten livestock production in sub-Saharan Africa including Benin. This country has been faced with an invasion of Rhipicephalus microplus, a major vector for babesiosis, theileriosis, and anaplasmosis over the last decade. Yet, data on TBD and the impact of the invasive ticks are lacking, making risk level evaluation and disease control arduous. In this study, epidemiological features of Babesia bovis, B. bigemina, Theileria spp...
December 28, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29331578/molecular-detection-and-characterisation-of-babesia-and-theileria-in-australian-hard-ticks
#3
Brooke Storey-Lewis, Ann Mitrovic, Brent McParland
Babesia and Theileria are intraerythrocytic protozoans of the phylum Apicomplexa. These species are capable of infecting wild and domestic animals and have historically caused great economic loss in the agricultural industry. In recent years human babesiosis has been deemed an emerging zoonosis in North America, Europe and Asia. The first locally acquired case of babesiosis in Australia, caused by Babesia microti, was reported in March 2012. A number of native Babesia and Theileria species have been identified in Australian marsupials, however their associated tick vectors and threat to human health is unknown...
December 24, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29290581/first-molecular-detection-of-babesia-canis-in-dogs-from-bosnia-and-herzegovina
#4
Agnesa Ćoralić, Simona Gabrielli, Amir Zahirović, Nikola M Stojanović, Giovanni Luigi Milardi, Adnan Jažić, Almedina Zuko, Denis Čamo, Suzana Otašević
Babesia spp. are tick-transmitted protozoan haemoparasites of great economic, veterinary and medical impact worldwide. Herein we reported the very high prevalence of autochthonous babesiosis in symptomatic dogs from Bosnia and Herzegovina in the period from 2014 to 2016. Eighty dogs that did not leave the country were examined using parasitological and molecular analyses and babesiosis was diagnosed in 82.5% and 85.0% of them, respectively (p < 0.001). One species, Babesia canis was identified using molecular methodology (PCR and sequence analysis)...
December 24, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29284564/the-fola-gene-from-the-rickettsia-endosymbiont-of-ixodes-pacificus-encodes-a-functional-dihydrofolate-reductase-enzyme
#5
James L Bodnar, Sergio Fitch, Allison Rosati, Jianmin Zhong
Although nonpathogenic bacterial endosymbionts have been shown to contribute to their arthropod host's fitness by supplying them with essential vitamins and amino acids, little is known about the nutritional basis for the symbiotic relationship of endosymbionts in ticks. Our lab has previously reported that Rickettsia species phylotype G021 in Ixodes pacificus carries all five genes for de novo folate synthesis, and that these genes are monophyletic with homologs from other Rickettsia species. In this study, the rickettsial folate synthesis folA gene, coding for dihydrofolate reductase, was PCR amplified, cloned into an expression vector, and overexpressed in E...
December 24, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29284563/a-novel-ehrlichia-species-in-blood-and-ixodes-ornithorhynchi-ticks-from-platypuses-ornithorhynchus-anatinus-in-queensland-and-tasmania-australia
#6
Alexander W Gofton, Siew-May Loh, Amanda D Barbosa, Andrea Paparini, Amber Gillett, James Macgregor, Charlotte L Oskam, Una M Ryan, Peter J Irwin
Worldwide, Ehrlichia spp. are emerging infectious organisms of domestic animals and people, however, most Ehrlichia spp. naturally infect wildlife reservoirs causing mainly asymptomatic infections. Australian ecosystems have been under-explored for these potentially pathogenic organisms, and recent studies have identified a range of novel Ehrlichia, and their sister genera, Anaplasma and 'Candidatus Neoehrlichia' species, from native Australian ticks. We used bacterial 16S rRNA (16S) next-generation sequencing and genus-specific PCR to profile the bacterial communities in platypus (Ornithorhynchus anatinus) blood samples and platypus ticks (Ixodes ornithorhynchi), and identified a high prevalence of Ehrlichia sequences...
December 24, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29290582/prevalence-of-different-rickettsia-spp-in-ixodes-ricinus-and-dermacentor-reticulatus-ticks-acari-ixodidae-in-north-eastern-poland
#7
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/29275874/australian-penguin-ticks-screened-for-novel-borrelia-species
#8
Katherine L Moon, Steven L Chown, Siew-May Loh, Charlotte L Oskam, Ceridwen I Fraser
Lyme borreliosis (or Lyme Disease) is an emerging threat to human health in the Northern Hemisphere caused by tick-borne bacteria from the Borrelia burgdorferi sensu lato (Bbsl) complex. Seabirds are important reservoir hosts of some members of the Bbsl complex in the Northern Hemisphere, and some evidence suggests this may be true of penguins in the Southern Hemisphere. While the Bbsl complex has not been detected in Australia, a novel Borrelia species ('Candidatus Borrelia tachyglossi') was recently sequenced from native ticks (Ixodes holocyclus and Bothriocroton concolor) parasitising echidnas (Tachyglossus aculeatus), suggesting unidentified borreliae may be circulating amongst native wildlife and their ticks...
December 15, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29269242/a-historical-snapshot-of-ixodes-scapularis-borne-pathogens-in-new-jersey-ticks-reflects-a-changing-disease-landscape
#9
Andrea Egizi, Vivien Roegner, Ary Faraji, Sean P Healy, Terry L Schulze, Robert A Jordan
Historical specimens, when available, can provide new insight into the distribution and evolution of pathogens that may not be discernible from more recent samples. We used ticks collected from hunter-killed white-tailed deer in New Jersey in 2002 to examine the prevalence and distribution of four pathogens transmitted by Ixodes scapularis, the blacklegged tick. Infection with Borrelia burgdorferi sensu stricto, Babesia microti, and Anaplasma phagocytophilum (the agents of Lyme disease, human babesiosis, and human granulocytic anaplasmosis, respectively) was highest in the Coastal Plain and lowest in the northwestern Skylands region...
December 15, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29258801/diversity-of-borrelia-spirochetes-and-other-zoonotic-agents-in-ticks-from-kyiv-ukraine
#10
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/29254841/the-importance-of-distinguishing-between-cryptic-species-by-morphological-characters
#11
LETTER
Igor Uspensky
No abstract text is available yet for this article.
December 13, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29246814/neuroborreliosis-and-acute-encephalopathy-the-use-of-cxcl13-as-a-biomarker-in-cns-manifestations-of-lyme-borreliosis
#12
Matthias Karrasch, Volker Fingerle, Katharina Boden, Andreas Darr, Michael Baier, Eberhard Straube, Igor Nenadic
We report the case of an 80-year-old patient with acute onset confusion initially suspected to reflect delirium in incipient Alzheimer's disease. Cerebrospinal fluid tests revealed an unusually severe form of neuroborreliosis, which resolved following antibiotic treatment. This was mirrored in the measurement of CXCL13, which is suggested as a complementary biomarker. Clinical implications for screening, differential diagnosis and treatment are discussed.
December 11, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29258802/a-molecular-algorithm-to-detect-and-differentiate-human-pathogens-infecting-ixodes-scapularis-and-ixodes-pacificus-acari-ixodidae
#13
Christine B Graham, Sarah E Maes, Andrias Hojgaard, Amy C Fleshman, Sarah W Sheldon, Rebecca J Eisen
The incidence and geographic range of tick-borne illness associated with Ixodes scapularis and Ixodes pacificus have dramatically increased in recent decades. Anaplasmosis, babesiosis, and Borrelia spirochete infections, including Lyme borreliosis, account for tens of thousands of reported cases of tick-borne disease every year. Assays that reliably detect pathogens in ticks allow investigators and public health agencies to estimate the geographic distribution of human pathogens, assess geographic variation in their prevalence, and evaluate the effectiveness of prevention strategies...
December 10, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29288009/borrelia-persica-infection-in-rock-hyraxes
#14
Gabriela Kleinerman, Roni King, Yaarit Nachum-Biala, Gad Baneth
Tick-borne relapsing fever (TBRF) is an acute infectious disease caused by arthropod-borne spirochetes of the genus Borrelia and characterized by recurrent episodes of fever. Borrelia persica, the causative agent of this disease in Israel, is transmitted by the argasid tick Ornithodoros tholozani. There is little information about the maintenance and possible vertebrate reservoirs of B. persica in nature, but the tick O. tholozani is known to feed on animals that enter its habitat in caves, rock crevices and shady environments...
December 9, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29275873/current-and-potential-future-distribution-of-the-american-dog-tick-dermacentor-variabilis-say-in-north-america
#15
Jordan N Minigan, Heather A Hager, Andrew S Peregrine, Jonathan A Newman
The American dog tick (Dermacentor variabilis) is medically and economically important in North America. This species is found across central and eastern North America from the Gulf Coast of Mexico through southern Canada. In parts of this region, D. variabilis is a vector for pathogens that cause diseases in humans and animals. Our aim was to determine whether climate change would affect the distribution of the climatically suitable area for D. variabilis in North America, to aid monitoring for potential future spread of tick-borne pathogens...
December 8, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29275872/the-long-term-outcome-of-tick-borne-encephalitis-in-central-europe
#16
Petra Bogovič, Daša Stupica, Tereza Rojko, Stanka Lotrič-Furlan, Tatjana Avšič-Županc, Andrej Kastrin, Lara Lusa, Franc Strle
BACKGROUND: Information on the long-term outcome of tick-borne encephalitis (TBE) is limited. OBJECTIVES: To assess the frequency and severity of post-encephalitic syndrome (PES) at different time points after TBE, and to determine the parameters associated with unfavourable outcome. METHODS: Adult patients diagnosed with TBE in Slovenia in the period 2007-2012 were followed-up for 12 months and also examined 2-7 years after TBE. Each patient was asked to refer a person of similar age without a history of TBE to serve as control...
December 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29223586/reduction-in-human-lyme-neuroborreliosis-associated-with-a-major-epidemic-among-roe-deer
#17
Nanna Skaarup Andersen, Sigurdur Skarphédinsson, Fredrikke C Knudtzen, Carsten Riis Olesen, Thøger Gorm Jensen, Per Moestrup Jensen
Lyme neuroborreliosis is the most severe clinical manifestation of Lyme borreliosis. In most of Denmark, and also Europe, the overall prevalence of Lyme borreliosis seems to be stabilising. This is not the case on the island of Funen, Denmark, where the number of human Lyme neuroborreliosis cases has markedly declined throughout the last decade. We propose the reason for the decline is a major epidemic among roe deer, killing almost half of their population, resulting in a reduction in the tick population which make it less likely to get a tick bite and therefore to contract Lyme neuroborreliosis...
December 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29223587/molecular-characterization-of-theileria-equi-in-horses-from-the-state-of-rio-de-janeiro-brazil
#18
Maristela Peckle, Marcus Sandes Pires, Claudia Bezerra da Silva, Renata Lins da Costa, Gabriela Lopes Vivas Vitari, Marcus Vinicius Xavier Senra, Roberto Júnio Pedroso Dias, Huarrisson Azevedo Santos, Carlos Luiz Massard
Theileria equi is one of the etiologic agents of the equine piroplasmosis. This infectious disease is transmitted by ticks and is a worldwide problem in the international horse movement. The 18S rRNA gene of T. equi is often used for genotyping and phylogenetic purpose. This study aimed to analyze the degree of the heterogeneity of the 18S rRNA gene of T. equi in horses from the state of Rio de Janeiro, Brazil. The complete T. equi 18S rRNA sequences were obtained from twenty naturally infected horses. The PCR amplicons were cloned and sequenced...
November 28, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29195857/evaluating-acarological-risk-for-exposure-to-ixodes-scapularis-and-ixodes-scapularis-borne-pathogens-in-recreational-and-residential-settings-in-washington-county-minnesota
#19
Micah B Hahn, Jenna K H Bjork, David F Neitzel, Frances M Dorr, Tessa Whitemarsh, Karen A Boegler, Christine B Graham, Tammi L Johnson, Sarah E Maes, Rebecca J Eisen
The distribution of I. scapularis, the tick vector of the bacteria that cause Lyme disease, has been expanding over the last two decades in the north-central United States in parallel with increasing incidence of human cases of Lyme disease in that region. However, assessments of residential risk for exposure to ticks are lacking from this region. Here, we measured the density of host-seeking I. scapularis nymphs in two suburban and two rural public recreational sites located in Washington County, Minnesota as well as in nearby residential properties...
November 22, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29239792/francisella-tularensis-and-other-bacteria-in-hares-and-ticks-in-north-rhine-westphalia-germany
#20
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
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