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https://www.readbyqxmd.com/read/28742149/predicting-the-risk-of-lyme-borreliosis-after-a-tick-bite-using-a-structural-equation-model
#1
Agnetha Hofhuis, Jan van de Kassteele, Hein Sprong, Cees C van den Wijngaard, Margriet G Harms, Manoj Fonville, Arieke Docters van Leeuwen, Mariana Simões, Wilfrid van Pelt
BACKGROUND: Understanding and quantification of the risk of Lyme borreliosis after a tick bite can aid development of prevention strategies against Lyme borreliosis. METHODS: We used 3,525 single tick bite reports from three large prospective studies on the transmission risk of tick-borne pathogens to humans, with 50 reports of Lyme borreliosis during the follow-up period, among 1,973 reports with known outcome. A structural equation model was applied to estimate the risk of Lyme borreliosis after a tick bite, and quantify the influence of: developmental stage of the tick, detection of Borrelia burgdorferi s...
2017: PloS One
https://www.readbyqxmd.com/read/28742123/molecular-and-maldi-tof-identification-of-ticks-and-tick-associated-bacteria-in-mali
#2
Adama Zan Diarra, Lionel Almeras, Maureen Laroche, Jean-Michel Berenger, Abdoulaye K Koné, Zakaria Bocoum, Abdoulaye Dabo, Ogobara Doumbo, Didier Raoult, Philippe Parola
Ticks are considered the second vector of human and animal diseases after mosquitoes. Therefore, identification of ticks and associated pathogens is an important step in the management of these vectors. In recent years, mass spectrometry of the laser disorder / matrix assisted ionization (MALDI-TOF MS) has been reported as a promising method for the identification of arthropods including ticks. The objective of this study was to improve the conditions for the preparation of tick samples for their identification by MALDI-TOF MS from field-collected ethanol-stored Malian samples and to evaluate the capacity of this technology to distinguish infected and uninfected ticks...
July 24, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28741465/engineering-of-chimeric-protein-based-on-e-protein-domain-iii-of-tick-borne-encephalitis-virus-and-ompf-porin-of-yersinia-pseudotuberculosis
#3
Anna M Stenkova, Natalia S Chopenko, Ludmila A Davydova, Andrey N Mazeika, Evgeniya P Bystritskaya, Olga Y Portnyagina, Stanislav D Anastyuk, Dmitrii S Kulbatskii, Ekaterina N Lyukmanova, Dmitriy A Dolgikh, Eduard Y Kostetsky, Nina M Sanina
Tick-borne encephalitis poses a serious public health threat in the endemic regions. The disease treatment is restricted to symptomatic therapy, so great expectations are in the development of the prophylactic and therapeutic vaccines. The domain III of E protein of the tick-borne encephalitis virus is the main antigenic domain which includes virus-specific epitopes recognized by neutralizing antibodies. We have expressed, isolated and characterized the chimeric protein based on the fusion of domain III of E protein of the tick-borne encephalitis virus and bacterial porin OmpF from Yersinia pseudotuberculosis...
July 24, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28739494/amblyomma-maculatum-secis-binding-protein-2-and-putative-selenoprotein-p-are-indispensable-for-pathogen-replication-and-tick-fecundity
#4
Khemraj Budachetri, Gary Crispell, Shahid Karim
Selenium, a vital trace element, is incorporated into selenoproteins to produce selenocysteine. Our previous studies have revealed an adaptive co-evolutionary process that has enabled the spotted fever-causing tick-borne pathogen Rickettsia parkeri to survive by manipulating an antioxidant defense system associated with selenium, which includes a full set of selenoproteins and other antioxidants in ticks. Here, we conducted a systemic investigation of SECIS binding protein 2 (SBP2) and putative selenoprotein P (SELENOP) by transcript silencing in adult female Gulf-coast ticks (Amblyomma maculatum)...
July 21, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28739301/a-new-pcr-assay-for-the-detection-and-differentiation-of-babesia-canis-and-babesia-vogeli
#5
Giada Annoscia, Maria Stefania Latrofa, Cinzia Cantacessi, Emanuela Olivieri, Maria Teresa Manfredi, Filipe Dantas-Torres, Domenico Otranto
Babesia spp. are globally distributed tick-borne protozoan parasites that infect the red blood cells of a wide range of vertebrate hosts, including humans. Diagnosis of babesiosis is often impeded by the transient presence of the parasites in peripheral blood, as well as by their pleomorphic nature. Given the reports of an expanding and, in some cases, sympatric geographical distribution of Babesia canis and Babesia vogeli in dogs and associated vectors, in Europe, the development of time-efficient and cost-effective diagnostic tools to detect and differentiate these two species is warranted...
July 8, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28736753/combination-of-rt-pcr-and-proteomics-for-the-identification-of-crimean-congo-hemorrhagic-fever-virus-in-ticks
#6
Isabel G Fernández de Mera, Ilias Chaligiannis, Angélica Hernández-Jarguín, Margarita Villar, Lourdes Mateos-Hernández, Anna Papa, Smaragda Sotiraki, Francisco Ruiz-Fons, Alejandro Cabezas-Cruz, Christian Gortázar, José de la Fuente
Crimean-Congo hemorrhagic fever (CCHF) is an emerging tick-borne zoonotic disease caused by the CCHF virus (CCHFV). In this study, an experimental approach combining RT-PCR and proteomics was used for the identification and characterization of CCHFV in 106 ticks from 7 species that were collected from small ruminants in Greece. The methodological approach included an initial screening for CCHFV by RT-PCR followed by proteomics analysis of positive and control negative tick samples. This novel approach allowed the identification of CCHFV-positive ticks and provided additional information to corroborate the RT-PCR findings using a different approach...
July 2017: Heliyon
https://www.readbyqxmd.com/read/28736624/lyme-and-dopaminergic-function-hypothesizing-reduced-reward-deficiency-symptomatology-by-regulating-dopamine-transmission
#7
Kenneth Blum, Edward J Modestino, Marcelo Febo, Bruce Steinberg, Thomas McLaughlin, Lyle Fried, David Baron, David Siwicki, Rajendra D Badgaiyan
The principal vector of Lyme disease in the United States is Ixodes scapularis: black legged or deer ticks. There is increased evidence that those infected may be plagued by anxiety or depression as well. Researchers have identified transcripts coding for two putative cytosolic sulfotransferases in these ticks, which recognized phenolic monoamines as their substrates. It is hypothesized that protracted Lyme disease sequelae may be due to impairment of dopaminergic function of the brain reward circuitry. The subsequent recombinant proteins exhibited sulfotransferase function against two neurotransmitters: dopamine and octopamine...
May 2017: Journal of Systems and Integrative Neuroscience
https://www.readbyqxmd.com/read/28736193/relapsing-fever-causative-agent-in-southern-iran-is-a-closely-related-species-to-east-african-borreliae
#8
Saied Reza Naddaf, Behnaz Ghazinezhad, Elham Kazemirad, Sally Jane Cutler
We obtained two blood samples from relapsing fever patients residing in Jask County, Hormozgan Province, southern Iran in 2013. Sequencing of a partial fragment of glpQ from two samples, and further characterization of one of them by analyzing flaB gene, and 16S-23S spacer (IGS) revealed the greatest sequence identity with East African borreliae, Borrelia recurrentis, and Borrelia duttonii, and Borrelia microti from Iran. Phylogenetic analyses of glpQ, flaB, and concatenated sequences (glpQ, flab, and IGS) clustered these sequences amongst East African Relapsing fever borreliae and B...
July 17, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28735872/characterization-of-a-novel-cystatin-type-2-from-rhipicephalus-microplus-midgut
#9
Thyago H S Cardoso, Stephen Lu, Boris R G Gonzalez, Ricardo J S Torquato, Aparecida S Tanaka
The Rhipicephalus (Boophilus) microplus is an exclusive bovine ectoparasite responsible for the transmission of pathogens that decrease meat, leather and milk productions. Cattle vaccination is an alternative to control tick infestations, but the discovery of potential antigens is still a challenge for researchers. Recently, our group performed a midgut transcriptome of engorged R. microplus tick, and out of 800 ESTs sequences one cystatin-coding sequence was identified and named Rmcystatin-4. In order to understand the physiological role of Rmcystatin-4, the aim of this work was the expression, purification and functional characterization of a novel type 2 cystatin from the tick R...
July 20, 2017: Biochimie
https://www.readbyqxmd.com/read/28734839/recombinant-expression-of-ixolaris-a-kunitz-type-inhibitor-from-the-tick-salivary-gland-for-nmr-studies
#10
V S De Paula, F H S Silva, I M B Francischetti, R Q Monteiro, A P Valente
Ixolaris is an anticoagulant protein identified in the tick saliva of Ixodes scapularis. Ixolaris contains 2 Kunitz like domains and binds to Factor Xa or Factor X as a scaffold for inhibition of the Tissue Factor (TF)/Factor VIIa (FVIIa). In contrast to tissue factor pathway inhibitor (TFPI), however, Ixolaris does not bind to the active site cleft of FXa. Instead, complex formation is mediated by the FXa heparin-binding exosite. Due to its potent and long-lasting antithrombotic activity, Ixolaris is a promising agent for anticoagulant therapy...
July 19, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28733336/dna-methylation-predicts-stroke-outcome-better-the-epigenetic-clock-is-ticking
#11
EDITORIAL
Liyong Wang, Guillaume Paré, Tatjana Rundek
No abstract text is available yet for this article.
July 21, 2017: Neurology
https://www.readbyqxmd.com/read/28730326/infectious-diseases-causing-autonomic-dysfunction
#12
REVIEW
Francisco Javier Carod Artal
OBJECTIVES: To review infectious diseases that may cause autonomic dysfunction. METHODS: Review of published papers indexed in medline/embase. RESULTS: Autonomic dysfunction has been reported in retrovirus (human immunodeficiency virus (HIV), human T-lymphotropic virus), herpes viruses, flavivirus, enterovirus 71 and lyssavirus infections. Autonomic dysfunction is relatively common in HIV-infected patients and heart rate variability is reduced even in early stages of infection...
July 20, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28728938/didelphis-albiventris-naturally-infected-with-hepatozoon-canis-in-southeastern-brazil
#13
Maria Regina Lucas da Silva, Felipe Fornazari, Larissa de Castro Demoner, Carlos Roberto Teixeira, Helio Langoni, Lucia Helena O'Dwyer
Hepatozoon species are vector-borne pathogens that infect domestic and wild animals. Marsupials of the species Didelphis albiventris are adapted to urban and peri-urban areas and act as reservoir hosts for several parasites. The present study evaluated the occurrence of infection by Hepatozoon species in synantropic D. albiventris from Botucatu, São Paulo, Brazil. Blood samples and ectoparasites from 19 D. albiventris were collected from urban and peri-urban areas. Hepatozoon spp. detection was performed by microscopy and molecular analysis...
July 14, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28728557/the-impact-of-illegal-waste-sites-on-a-transmission-of-zoonotic-viruses
#14
Darja Duh, Sandra Hasic, Elena Buzan
BACKGROUND: Illegal waste disposal impacts public health and causes aesthetic and environmental pollution. Waste disposed in places without permitted and controlled facilities can provide a ready source of nutrition and shelter for rodents and thus promote the spread of their ecto- and endoparasites. The presence of two distinct zoonotic viruses, lymphocytic choriomeningitis virus (LCMV) and tick-borne encephalitis virus (TBEV), was searched at illegal waste sites. The aim of this study was to determine the prevalence of infection with both viruses in rodents and to discuss the virus-rodent relations in such environments...
July 20, 2017: Virology Journal
https://www.readbyqxmd.com/read/28727515/brave-new-worlds-the-expanding-universe-of-lyme-disease
#15
Brandee L Stone, Yvonne Tourand, Catherine A Brissette
Projections around the globe suggest an increase in tick-vectored disease incidence and distribution, and the potential for emergence of novel tick-borne pathogens. Lyme disease is the most common reported tick-borne illness in the Unites States and is prevalent throughout much of central Europe. In recent years, the worldwide burden of Lyme disease has increased and extended into regions and countries where the disease was not previously reported. In this review, we discuss the trends for increasing Lyme disease, and examine the factors driving Lyme disease expansion, including the effect of climate change on the spread of vector Ixodid ticks and reservoir hosts; and the impacts of increased awareness on disease reporting and diagnosis...
July 20, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28725639/anaplasma-phagocytophilum-msp4-and-hsp70-proteins-are-involved-in-interactions-with-host-cells-during-pathogen-infection
#16
Marinela Contreras, Pilar Alberdi, Lourdes Mateos-Hernández, Isabel G Fernández de Mera, Ana L García-Pérez, Marie Vancová, Margarita Villar, Nieves Ayllón, Alejandro Cabezas-Cruz, James J Valdés, Snorre Stuen, Christian Gortazar, José de la Fuente
Anaplasma phagocytophilum transmembrane and surface proteins play a role during infection and multiplication in host neutrophils and tick vector cells. Recently, A. phagocytophilum Major surface protein 4 (MSP4) and Heat shock protein 70 (HSP70) were shown to be localized on the bacterial membrane, with a possible role during pathogen infection in ticks. In this study, we hypothesized that A. phagocytophilum MSP4 and HSP70 have similar functions in tick-pathogen and host-pathogen interactions. To address this hypothesis, herein we characterized the role of these bacterial proteins in interaction and infection of vertebrate host cells...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28725412/corticosterone-a-costly-mediator-of-signal-honesty-in-sand-lizards
#17
Willow R Lindsay, Erik Wapstra, Bengt Silverin, Mats Olsson
The mechanisms underlying honest signal expression remain elusive and may involve the integration of social and physiological costs. Corticosterone is a socially modulated metabolic hormone that mediates energy investment and behavior and may therefore function to deter dishonest signal expression. We examined the relationship between corticosterone and green badge coloration in male sand lizards (Lacerta agilis), hypothesizing that physiological and behavioral costs resulting from elevated baseline glucocorticoids function in maintenance of honest signal expression...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28724731/cascading-effects-of-predator-activity-on-tick-borne-disease-risk
#18
Tim R Hofmeester, Patrick A Jansen, Hendrikus J Wijnen, Elena C Coipan, Manoj Fonville, Herbert H T Prins, Hein Sprong, Sipke E van Wieren
Predators and competitors of vertebrates can in theory reduce the density of infected nymphs (DIN)-an often-used measure of tick-borne disease risk-by lowering the density of reservoir-competent hosts and/or the tick burden on reservoir-competent hosts. We investigated this possible indirect effect of predators by comparing data from 20 forest plots across the Netherlands that varied in predator abundance. In each plot, we measured the density of questing Ixodes ricinus nymphs (DON), DIN for three pathogens, rodent density, the tick burden on rodents and the activity of mammalian predators...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28722598/risk-factors-for-severe-infection-hospitalization-and-prolonged-antimicrobial-therapy-in-patients-with-babesiosis
#19
Neeharik Mareedu, Anna M Schotthoefer, Jason Tompkins, Matthew C Hall, Thomas R Fritsche, Holly M Frost
Babesiosis is an emerging tick-borne disease transmitted by the hard tick Ixodes scapularis, which also transmits Lyme disease. Better gradation of prognostic indicators are needed to determine which patients may develop serious complications requiring hospitalization, and to provide early guidance on appropriate therapy. In this study, we evaluated 128 patients with smear or real time polymerase chain reaction-confirmed Babesia microti infections over a period of 16 years. Patients with asplenia or immunocompromising conditions were more likely to have severe infection (P < 0...
July 10, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722592/a-cluster-of-symptomatic-and-asymptomatic-infections-of-severe-fever-with-thrombocytopenia-syndrome-caused-by-person-to-person-transmission
#20
Deyu Huang, Yueping Jiang, Xiaoping Liu, Bo Wang, Junming Shi, Zhan Su, Hui Wang, Ting Wang, Shuang Tang, Hanyun Liu, Zhihong Hu, Fei Deng, Shu Shen
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a novel phlebovirus that was identified to be the etiological pathogen of the emerging infectious disease, severe fever with thrombocytopenia syndrome (SFTS). SFTSV could be transmitted through tick bite. Transmission of SFTSV among humans has also been reported mainly through direct blood contact. In July 2014, a cluster of six suspected SFTS cases occurred in Shandong Province, China. In this cluster, both symptomatic and asymptomatic persons were included...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
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