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https://www.readbyqxmd.com/read/27913725/in-vivo-expression-technology-and-5-end-mapping-of-the-borrelia-burgdorferi-transcriptome-identify-novel-rnas-expressed-during-mammalian-infection
#1
Philip P Adams, Carlos Flores Avile, Niko Popitsch, Ivana Bilusic, Renée Schroeder, Meghan Lybecker, Mollie W Jewett
Borrelia burgdorferi, the bacterial pathogen responsible for Lyme disease, modulates its gene expression profile in response to the environments encountered throughout its tick-mammal infectious cycle. To begin to characterize the B. burgdorferi transcriptome during murine infection, we previously employed an in vivo expression technology-based approach (BbIVET). This identified 233 putative promoters, many of which mapped to un-annotated regions of the complex, segmented genome. Herein, we globally identify the 5' end transcriptome of B...
December 1, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27911694/seroprevalence-of-babesia-microti-in-individuals-with-lyme-disease
#2
Sabino R Curcio, Laurel P Tria, Azad L Gucwa
INTRODUCTION: Babesiosis is an emerging tick-borne disease (TBD) caused by Babesia microti, an intracellular parasite of red blood cells. Currently, it is the highest ranked pathogen transmitted by blood transfusion. Most healthy individuals infected with B. microti are asymptomatic, but may be at risk for chronic infection. Similar to Lyme disease transmitted by Borrelia burgdorferi, B. microti is spread by Ixodes scapularis ticks. The rate of coinfection with these TBDs in humans is unclear as most studies have focused their prevalence in ticks or rodent reservoirs...
December 2016: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/27904685/phylogenetic-analysis-of-basic-helix-loop-helix-transcription-factors-in-the-genome-of-a-typical-human-disease-vector
#3
Meng-Yun Chen, Ying Dong, Rui-Xue Chang, Qian-Qian Ang, Ran Zhang, Yan-Yan Wu, Yi-Hui Xu, Wen-Sheng Lu, Xiao-Dong Zheng
Ixodes scapularis, the black-legged tick, is one of the most common human-disease vectors and transmits Borrelia species, such as B. burgdorferi, as well as Theileria microti, Anaplasma phagocytophilum, etc. As basic helix-loop-helix (bHLH) transcription factors have been recognized for many years as important regulators of various developmental processes, we performed phylogenetic analysis of the black-legged tick genome in order to identify the number and family of bHLH transcription factors. Because bHLH family members have been identified in many organisms, including silkworm and fruit fly, we were able to conduct this survey and identify 58 putative bHLH transcription factors...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27902419/influence-of-tick-and-mammalian-physiological-temperatures-on-borrelia-burgdorferi-biofilms
#4
Shafiq Shaikh, Venkata Arun Timmaraju, Jason P Torres, Kayla M Socarras, Priyanka A S Theophilus, Eva Sapi
The spirochaete bacterium Borrelia burgdorferisensu lato is the aetiologic agent of Lyme disease. Borrelia is transmitted to mammals through tick bite and is adapted to survive at tick and mammalian physiological temperatures. We have previously shown that B. burgdorferi can exist in different morphological forms, including the antibiotic-resistant biofilm form, in vitro and in vivo. B. burgdorferi forms aggregates in ticks as well as in humans, indicating potential of biofilm formation at both 23 and 37 °C...
November 2016: Microbiology
https://www.readbyqxmd.com/read/27900646/the-potential-of-omics-technologies-in-lyme-disease-biomarker-discovery-and-early-detection
#5
REVIEW
Alaa Badawi
Lyme borreliosis (LB) is the most prevalent arthropod-borne infectious disease in North America and many countries of the temperate Northern Hemisphere. It is associated with local and systemic manifestations and has persistent post-treatment health complications in some individuals. Innate and acquired immunity-related inflammation is likely to play a critical role in both host defense against Borrelia burgdorferi and disease severity. Large-scale analytical approaches to quantify gene expression (transcriptomics), proteins (proteomics) and metabolites (metabolomics) in LB have recently emerged with a potential to advance the development of disease biomarkers in early, disseminated and posttreatment disease stages...
November 29, 2016: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/27898670/gray-wolf-exposure-to-emerging-vector-borne-diseases-in-wisconsin-with-comparison-to-domestic-dogs-and-humans
#6
Rocio F Jara, Adrian P Wydeven, Michael D Samuel
World-wide concern over emerging vector-borne diseases has increased in recent years for both animal and human health. In the United Sates, concern about vector-borne diseases in canines has focused on Lyme disease, anaplasmosis, ehrlichiosis, and heartworm which infect domestic and wild canids. Of these diseases, Lyme and anaplasmosis are also frequently diagnosed in humans. Gray wolves (Canis lupus) recolonized Wisconsin in the 1970s, and we evaluated their temporal and geographic patterns of exposure to these four vector-borne diseases in Wisconsin as the population expanded between 1985 and 2011...
2016: PloS One
https://www.readbyqxmd.com/read/27894863/molecular-evidence-for-toxoplasma-gondii-in-feeding-and-questing-ixodes-ricinus-ticks
#7
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/27893309/acarological-risk-of-borrelia-burgdorferi-sensu-lato-infections-across-space-and-time-in-the-netherlands
#8
Willem Takken, Arnold J H van Vliet, Niels O Verhulst, Frans H H Jacobs, Fedor Gassner, Nienke Hartemink, Sara Mulder, Hein Sprong
A longitudinal investigation on tick populations and their Borrelia infections in the Netherlands was undertaken between 2006 and 2011 with the aim to assess spatial and temporal patterns of the acarological risk in forested sites across the country and to assess variations in Borrelia genospecies diversity. Ticks were collected monthly in 11 sites and nymphs were examined for Borrelia infections. Tick populations expressed strong seasonal variations, with consistent and significant differences in mean tick densities between sites...
November 28, 2016: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/27885483/neuroborreliosis
#9
John J Halperin
Appropriate, critical application of evidence-based diagnostic criteria enables both a clear definition of what constitutes neuroborreliosis-nervous system infection with Borrelia burgdorferi sensu stricto in the US, B garinii and less commonly B. afzelii and other species in Europe-and recognition that this disorder is quite similar in Europe and the US. Most commonly evidenced by lymphocytic meningitis and/or multifocal inflammation of the peripheral (common; cranial neuropathy, radiculopathy, mononeuropathy multiplex) or central (rare) nervous system, it is readily diagnosed and highly antibiotic responsive...
November 24, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27883377/borrelia-burgdorferi-%C3%A2-morphological-structure-and-motility-as-adaptation-for-transmission-and-survival-in-the-habitat-of-a-tick-vertebrate-setup
#10
Paweł Penza, Anna Moniuszko-Malinowska, Piotr Czupryna, Sławomir Pancewicz, Joanna Zajkowska
Lyme borreliosis is a multisystem chronic disease caused by Borrelia burgdorferi sensu lato (s.l.) spirochete transmitted by Ixodes. This bacterium has a remarkable ability to survive in tick-vertebrate setup. Its infection causes diagnostic and clinical difficulties. It was distinguished as a separate disease entity over 30 years ago. Observations made by Steere et al. proved to be a milestone since they found correlation between the occurrence of skin and joint lesions with tick bites. Further studies showed that the disease affects not only joints and skin, but also nervous and circulatory systems...
2016: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/27877080/established-population-of-blacklegged-ticks-with-high-infection-prevalence-for-the-lyme-disease-bacterium-borrelia-burgdorferi-sensu-lato-on-corkscrew-island-kenora-district-ontario
#11
John D Scott, Janet E Foley, Kerry L Clark, John F Anderson, Lance A Durden, Jodi M Manord, Morgan L Smith
We document an established population of blacklegged ticks, Ixodes scapularis, on Corkscrew Island, Kenora District, Ontario, Canada. Primers of the outer surface protein A (OspA) gene, the flagellin (fla) gene, and the flagellin B (flaB) gene were used in the PCR assays to detect Borrelia burgdorferi sensu lato (s.l.), the Lyme disease bacterium. In all, 60 (73%) of 82 adult I. scapularis, were infected with B. burgdorferi s.l. As well, 6 (43%) of 14 unfed I. scapularis nymphs were positive for B. burgdorferi s...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27876087/heterogeneity-in-the-abundance-and-distribution-of-ixodes-ricinus-and-borrelia-burgdorferi-sensu-lato-in-scotland-implications-for-risk-prediction
#12
Caroline Millins, Lucy Gilbert, Paul Johnson, Marianne James, Elizabeth Kilbride, Richard Birtles, Roman Biek
BACKGROUND: Cases of Lyme borreliosis, a vector-borne zoonosis caused by bacteria in the Borrelia burgdorferi (sensu lato) species group, have increased in recent years in Europe. Knowledge of environmental factors associated with abundance of the tick vector Ixodes ricinus and the pathogen B. burgdorferi (s.l.) is of interest to understand responses to environmental changes, predict variation in risk and to inform management interventions. METHODS: Nineteen woodland sites across Scotland were surveyed in 2012 for B...
November 22, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27870540/lyme-disease-in-poland-in-2014
#13
Iwona Paradowska-Stankiewicz, Irena Chrześcijańska
INTRODUCTION: Lyme disease is the most common tick-borne disease, caused by spirochetes of the Borrelia genus transmitted by ticks of the Ixodes genus. Infection caused by Borrelia burgdorferi occur throughout Poland and therefore, according also to ECDC description, the whole country should be considered as an endemic area. OBJECTIVES: The aim of this study was to assess the epidemiological situation of Lyme disease in Poland in 2014 in comparison to the previous years...
2016: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/27869793/lyme-disease-spirochaete-borrelia-burgdorferi-does-not-require-thiamin
#14
Kai Zhang, Jiang Bian, Yijie Deng, Alexis Smith, Roy E Nunez, Michael B Li, Utpal Pal, Ai-Ming Yu, Weigang Qiu, Steven E Ealick, Chunhao Li
Thiamin pyrophosphate (ThDP), the active form of thiamin (vitamin B1), is believed to be an essential cofactor for all living organisms(1,2). Here, we report the unprecedented result that thiamin is dispensable for the growth of the Lyme disease pathogen Borrelia burgdorferi (Bb)(3). Bb lacks genes for thiamin biosynthesis and transport as well as known ThDP-dependent enzymes(4), and we were unable to detect thiamin or its derivatives in Bb cells. We showed that eliminating thiamin in vitro and in vivo using BcmE, an enzyme that degrades thiamin, has no impact on Bb growth and survival during its enzootic infectious cycle...
November 21, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27867375/ceftriaxone-pulse-dosing-fails-to-eradicate-biofilm-like-microcolony-b-burgdorferi-persisters-which-are-sterilized-by-daptomycin-doxycycline-cefuroxime-without-pulse-dosing
#15
Jie Feng, Shuo Zhang, Wanliang Shi, Ying Zhang
Although the majority of Lyme disease patients can be cured, at least 10-20% of the patients continue to suffer from persisting symptoms such as fatigue, muscular and joint pain, and neurologic impairment after standard 2-4 week antibiotic treatment. While the causes for this post-treatment Lyme disease symptoms are unclear, one possibility is due to Borrelia burgdorferi persisters that are not effectively killed by current antibiotics such as doxycycline or amoxicillin used to treat Lyme disease. A previous study showed that four rounds of ceftriaxone pulse dosing treatment eradicated B...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27866446/clinical-and-serological-one-year-follow-up-of-patients-after-the-bite-of-ixodes-ricinus-ticks-infected-with-borrelia-burgdorferi-sensu-lato
#16
Violeta T Briciu, Mirela Flonta, Doina F Ţăţulescu, Fabian Meyer, Daniela Sebah, Dumitru Cârstina, Andrei D Mihalca, Călin M Gherman, Cecilia Hizo-Teufel, Ingrid Huber, Volker Fingerle, Mihaela Lupșe
BACKGROUND: The risk of developing Lyme borreliosis (LB) after the bite of a Borrelia (B.) burgdorferi sensu lato (s.l.) infected tick in Romania is unknown. METHODS: The present prospective study, performed in 2010-2011 in a hospital in Romania, has followed-up clinical and serological outcome of patients that presented with B. burgdorferi positive Ixodes (I.) ricinus bite. A second group of patients, including age, sex and residence-matched individuals bitten by B...
November 21, 2016: Infectious Diseases
https://www.readbyqxmd.com/read/27865266/ability-of-an-oral-formulation-of-afoxolaner-to-protect-dogs-from-borrelia-burgdorferi-infection-transmitted-by-wild-ixodes-scapularis-ticks
#17
C F Baker, J W McCall, S D McCall, M D Drag, E B Mitchell, S T Chester, D Larsen
A randomized, blinded, negative controlled study was conducted to determine whether treatment with afoxolaner (NexGard(®), Merial, Inc.) would prevent the transmission of Borrelia burgdorferi to dogs by wild caught Ixodes scapularis ticks. Twenty healthy dogs were randomly assigned to two groups of ten dogs each. Ten dogs were treated orally on Day 0 at a dose near the minimum recommended dose of afoxolaner of 2.5mg/kg (actual doses 2.5-3.1mg/kg) and ten control dogs were not treated. On Day 28, each dog was infested with approximately 50 adult unfed wild caught I...
December 2016: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/27860010/detection-of-lyme-disease-and-anaplasmosis-pathogens-via-pcr-in-pennsylvania-deer-ked
#18
M Buss, L Case, B Kearney, C Coleman, J D Henning
Borrelia burgdorferi and Anaplasma phagocytophilum are obligate intracellular parasites that maintain their life cycles in enzoonotic vector-host cycles with Ixodes scapularis as a vector. In addition to ticks, the hosts are commonly infested with insects from the Hippoboscidae family. This study confirms the presence of B. burgdorferi and A. phagocytophilum in deer keds (Lipoptena cervi) removed from white-tailed deer using PCR. Detection of these pathogens in deer ked represents a potential novel susceptibility of wildlife and also suggests the risk of transmission of these pathogens to humans and animals alike through the bite of an infected ectoparasite...
December 2016: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/27859766/structural-and-molecular-analysis-of-a-protective-epitope-of-lyme-disease-antigen-ospa-and-antibody-interactions
#19
Shivender Shandilya, Nese Kurt Yilmaz, Andrew Sadowski, Ejemel Monir, Zachary A Schiller, William D Thomas, Mark S Klempner, Celia A Schiffer, Yang Wang
The murine monoclonal antibody LA-2 recognizes a clinically protective epitope on outer surface protein (OspA) of Borrelia burgdorferi, the causative agent of Lyme disease in North America. Human antibody equivalence to LA-2 is the best serologic correlate of protective antibody responses following OspA vaccination. Understanding the structural and functional basis of the LA-2 protective epitope is important for developing OspA-based vaccines and discovering prophylactic antibodies against Lyme disease. Here, we present a detailed structure-based analysis of the LA-2/OspA interaction interface and identification of residues mediating antibody recognition...
November 16, 2016: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/27857714/t-cells-exacerbate-lyme-borreliosis-in-tlr2-deficient-mice
#20
Carrie E Lasky, Carmela L Pratt, Kinsey A Hilliard, John L Jones, Charles R Brown
Infection of humans with the spirochete, Borrelia burgdorferi, causes Lyme borreliosis and can lead to clinical manifestations such as arthritis, carditis, and neurological conditions. Experimental infection of mice recapitulates many of these symptoms and serves as a model system for the investigation of disease pathogenesis and immunity. Innate immunity is known to drive the development of Lyme arthritis and carditis, but the mechanisms driving this response remain unclear. Innate immune cells recognize B...
2016: Frontiers in Immunology
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