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https://www.readbyqxmd.com/read/28930546/tick-host-pathogen-systems-immunobiology-an-interactive-trio
#1
Stephen K Wikel
Significant new insights are being made into tick modulation of host immune defenses and the implications of those host defense changes on tick-borne pathogen transmission and establishment of infection. Understanding tick saliva complexity increased with construction and analyses of salivary gland cDNA libraries. High throughput next generation sequencing and advances in proteomics are revealing greater complexity of saliva, nature of gene families and differential gene expression patterns not previously attainable...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28928417/tick-borne-encephalitis-in-japan-republic-of-korea-and-china
#2
REVIEW
Kentaro Yoshii, Joon Young Song, Seong-Beom Park, Junfeng Yang, Heinz-Josef Schmitt
Tick-borne encephalitis virus (TBEV) causes mild or moderate febrile illness in humans that may progress to encephalitis, leading to severe long-term complications and sometimes death. TBEV is prevalent in the Eurasian continent and has been isolated in China, Japan and Republic of Korea (ROK). The TBEV isolates from Japan are of the Far-Eastern subtype; in ROK, the isolates are of the Western subtype; and all TBEV isolates in China are of the Far-Eastern subtype, except one strain that was identified most recently as the Siberian subtype...
September 20, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28928415/cultivation-of-anaplasma-ovis-in-the-hl-60-human-promyelocytic-leukemia-cell-line
#3
Ran Wei, Hong-Bo Liu, Frans Jongejan, Bao-Gui Jiang, Qiao-Cheng Chang, Xue Fu, Jia-Fu Jiang, Na Jia, Wu-Chun Cao
The tick-borne bacterium Anaplasma ovis is a widely distributed pathogen affecting sheep, goats and wild ruminants. Here, the HL-60 human promyelocytic leukemia cell line was used to isolate A. ovis from PCR-positive sheep and goats in Heilongjiang Province, China. Two weeks after inoculation, morulae were observed in cytoplasmic vacuoles in four different HL-60 cultures. Confocal microscopy using a Cy3-labeled A. ovis-specific probe confirmed that the HL-60 cells were infected with A. ovis. Cells from the 6th HL-60 subculture displayed positive fluorescence when incubated with A...
September 20, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28927427/first-molecular-detection-and-characterization-of-zoonotic-bartonella-species-in-fleas-infesting-domestic-animals-in-tunisia
#4
Saba Zouari, Fatma Khrouf, Youmna M'ghirbi, Ali Bouattour
BACKGROUND: Bartonellosis is an emerging vector-borne disease caused by different intracellular bacteria of the genus Bartonella (Rhizobiales: Bartonellaceae) that is transmitted primarily by blood-sucking arthropods such as sandflies, ticks and fleas. In Tunisia, there are no data available identifying the vectors of Bartonella spp. In our research, we used molecular methods to detect and characterize Bartonella species circulating in fleas collected from domestic animals in several of the country's bioclimatic areas...
September 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28917305/genetic-variability-of-cloned-cytauxzoon-felis-ribosomal-rna-its1-and-its2-genomic-regions-from-domestic-cats-with-varied-clinical-outcomes-from-five-states
#5
Dana A Pollard, Mason V Reichard, Leah A Cohn, Andrea M James, Patricia J Holman
Cytauxzoon felis is a tick-borne hemoparasite that causes cytauxzoonosis in domestic cats in the United States. Historically, feline cytauxzoonosis was reported to be nearly always fatal. However, increasing evidence of cats surviving acute infection and/or harboring a chronic, subclinical infection has suggested the existence of different C. felis strains that may vary in pathogenicity. In this study, the intraspecific variation of the C. felis first and second ribosomal RNA internal transcribed spacer (ITS1, ITS2) regions was assessed for any clinical outcome or geographic associations...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28915259/a-novel-mechanism-of-antibody-mediated-enhancement-of-flavivirus-infection
#6
Denise Haslwanter, Dieter Blaas, Franz X Heinz, Karin Stiasny
Antibody-dependent enhancement of viral infection is a well-described phenomenon that is based on the cellular uptake of infectious virus-antibody complexes following their interaction with Fcγ receptors expressed on myeloid cells. Here we describe a novel mechanism of antibody-mediated enhancement of infection by a flavivirus (tick-borne encephalitis virus) in transformed and primary human cells, which is independent of the presence of Fcγ receptors. Using chemical cross-linking and immunoassays, we demonstrate that the monoclonal antibody (mab) A5, recognizing an epitope at the interface of the dimeric envelope protein E, causes dimer dissociation and leads to the exposure of the fusion loop (FL)...
September 15, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28905982/vector-borne-diseases-in-cats-in-germany
#7
Michèle Bergmann, Katrin Hartmann
Vector-borne diseases (VBDs) are caused by a wide range of pathogens, which are transmitted by a variety of vectors, such as ticks and fleas. As a result of climate changes, more vector-borne diseases are becoming endemic in Germany, not only in dogs, but also in cats. For some of the pathogens prevalence data still need to be investigated in Germany. However, natural infections with Bartonella, Anaplasma, haemotropic Mycoplasma and Borrelia species have already been described in German cats. Clinical relevance of these pathogens is not fully understood, and it is still unknown, why most infected cats stay asymptomatic and which predisposing factors contribute to the development of clinical signs in cats...
September 13, 2017: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/28905230/molecular-detection-of-anaplasma-platys-anaplasma-phagocytophilum-and-wolbachia-sp-but-not-ehrlichia-canis-in-croatian-dogs
#8
Doroteja Huber, Irena Reil, Sanja Duvnjak, Daria Jurković, Damir Lukačević, Miroslav Pilat, Ana Beck, Željko Mihaljević, Lea Vojta, Adam Polkinghorne, Relja Beck
The bacteria Anaplasma platys, Anaplasma phagocytophilum and Ehrlichia canis are tick-borne agents that cause canine vector-borne disease. The prevalence of these pathogens in South Eastern Europe is unknown with the exception of an isolated case of A. platys detected in a dog imported into Germany from Croatia. To gain a better insight into their presence and prevalence, PCR-based screening for these bacterial pathogens was performed on domesticated dogs from different regions of Croatia. Blood samples from 1080 apparently healthy dogs from coastal and continental parts of Croatia as well as tissue samples collected from 63 deceased dogs with a history of anaemia and thrombocytopenia were collected for molecular screening by an Anaplasmataceae-specific 16S rRNA conventional PCR...
September 14, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28902259/clinical-and-hematological-evaluation-of-rangelia-vitalii-naturally-infected-dogs-in-southeastern-brazil
#9
Tatiana Didonet Lemos, Helena Keiko Toma, Renata Quintela Assad, Adrianna Vieira da Silva, Rafael Gomes Bartolomeu Corrêa, Nádia Regina Pereira Almosny
Rangelia vitalii, a tick-borne piroplasm that infects dogs, has been recently molecularly characterized in Brazil, Uruguay and Argentina. Studies on molecular characterization of these piroplasms in different Brazilian regions are scarce. The aim of this study was to evaluate clinical and hematological changes in dogs caused by R. vitalii in the mountainous region of the state of Rio de Janeiro. Blood samples from 36 dogs were evaluated for piroplasms and hematological disorders using light microscopy and molecular analysis...
August 24, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28888642/spatio-temporal-variations-and-genetic-diversity-of-anaplasma-spp-in-cattle-from-the-north-of-tunisia
#10
Hanène Belkahia, Mourad Ben Said, Narjesse El Mabrouk, Mariem Saidani, Chayma Cherni, Mariem Ben Hassen, Ali Bouattour, Lilia Messadi
In cattle, anaplasmosis is a tick-borne rickettsial disease caused by Anaplasma marginale, A. centrale, A. phagocytophilum, and A. bovis. To date, no information concerning the seasonal dynamics of single and/or mixed infections by different Anaplasma species in bovines are available in Tunisia. In this work, a total of 1035 blood bovine samples were collected in spring (n=367), summer (n=248), autumn (n=244) and winter (n=176) from five different governorates belonging to three bioclimatic zones from the North of Tunisia...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28888641/a-molecular-survey-of-small-ruminant-hemotropic-mycoplasmosis-in-turkey-including-first-laboratory-confirmed-clinical-cases-caused-by-mycoplasma-ovis
#11
Munir Aktas, Sezayi Ozubek
Hemotropic mycoplasmas are emerging zoonotic pathogens that cause mild to severe hemolytic anemia. Blood samples and thin blood smears were collected from six sheep exhibiting clinical symptoms typical of hemolytic anemia. Coccoid and ring-shaped M. ovis were found on the surface of erythrocytes of infected sheep. Parasitemia ranged from 0.7% to 3.7% in individual smears. Clinical cases caused by Mycoplasma ovis were evaluated, and prevalence, based on DNA screening for the 16S rRNA gene of hemoplasmas in apparently healthy sheep (n=328) and goats (n=272) from the same area, was 11...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28887186/to-test-or-not-to-test-laboratory-support-for-the-diagnosis-of-lyme-borreliosis
#12
REVIEW
Ram B Dessau, Alje P van Dam, Volker Fingerle, Jeremy Gray, Joppe Hovius, Klaus-Peter Hunfeld, Benoit Jaulhac, Olaf Kahl, Wolfgang Kristoferitsch, Per-Eric Lindgren, Mateusz Markowicz, Sally Mavin, Katharina Ornstein, Tobias Rupprecht, Gerold Stanek, Franc Strle
BACKGROUND: Lyme borreliosis (LB) is a tick-borne infection caused by Borrelia burgdorferi sensu lato. The most frequent clinical manifestations are erythema migrans and Lyme neuroborreliosis. Currently, a large volume of diagnostic testing for Lyme borreliosis is reported, whereas the incidence of clinically relevant disease manifestations is low. This indicates overuse of diagnostic testing for LB with implications for patient care and cost effective health management. AIM: The recommendations provided in this review are intended to support both the clinical diagnosis and initiatives for a more rational use of laboratory testing in patients with clinically suspected Lyme borreliosis...
September 5, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28882852/human-seroprevalence-of-borrelia-miyamotoi-in-manitoba-canada-in-2011-2014-a-cross-sectional-study
#13
Kamran Kadkhoda, Cecilia Dumouchel, Janna Brancato, Ainsley Gretchen, Peter J Krause
BACKGROUND: Hard tick-borne relapsing fever caused by Borrelia miyamotoi has been reported in Russia, the Netherlands, Germany, Japan and the northeastern and upper midwestern United States. We sought to investigate the presence of B. miyamotoi infection in humans in Manitoba, Canada. METHODS: Two hundred fifty sera collected from residents of Manitoba with suspected Lyme disease between 2011 and 2014 were tested for Borrelia burgdorferi antibody using a C6 peptide enzyme-linked immunosorbent assay (ELISA) followed by Western blot...
September 6, 2017: CMAJ Open
https://www.readbyqxmd.com/read/28882512/epidemiology-of-babesia-anaplasma-and-trypanosoma-species-using-a-new-expanded-reverse-line-blot-hybridization-assay
#14
Martina Soledad Paoletta, Ludmila López Arias, Sofía de la Fournière, Eliana Carolina Guillemi, Carlos Luciani, Néstor Fabián Sarmiento, Juan Mosqueda, Marisa Diana Farber, Silvina Elizabeth Wilkowsky
Vector-borne hemoparasitic infections are a major problem that affects livestock industries worldwide, particularly in tropical and subtropical regions. In this work, a reverse line blot (RLB) hybridization assay was developed for the simultaneous detection and identification of Anaplasma, Babesia and bovine trypanosomes, encompassing in this way the most relevant hemoparasites that affect cattle. A total of 186 bovine blood samples collected from two different ecoepidemiological regions of northeast Argentina, with and without tick control, were analyzed with this new RLB...
September 1, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28879619/borrelia-miyamotoi-other-vector-borne-agents-in-cat-blood-and-ticks-in-eastern-maryland
#15
Avery B Shannon, Renee Rucinsky, Holly D Gaff, R Jory Brinkerhoff
We collected blood and tick samples in eastern Maryland to quantify vector-borne pathogen exposure and infection in healthy cats and to assess occupational disease risk to veterinary professionals and others who regularly interact with household pets. Thirty-six percent of healthy cats parasitized by ticks at time of examination (9/25) were exposed to, and 14% of bloods (7/49) tested PCR-positive for, at least one vector-borne pathogen including several bloods and ticks with Borrelia miyamotoi, a recently recognized tick-borne zoonotic bacterium...
September 6, 2017: EcoHealth
https://www.readbyqxmd.com/read/28877743/evaluation-of-the-efficacy-of-sarolaner-simparica%C3%A2-in-the-prevention-of-babesiosis-in-dogs
#16
Thomas Geurden, Robert Six, Csilla Becskei, Steven Maeder, Anne Lloyd, Sean Mahabir, Josephus Fourie, Julian Liebenberg
BACKGROUND: Canine babesiosis is a clinically significant emerging vector-borne disease caused among others by the protozoan Babesia canis. The efficacy of sarolaner (Simparica®; Zoetis; at the minimum recommended label dose of 2.0 mg per kg bodyweight) in the prevention of babesiosis was evaluated in twenty-four dogs randomly allocated to either a placebo-treated group or one of two sarolaner-treated groups. At 21 or 28 days after treatment administration, dogs were infested with 50 ± 4 Dermacentor reticulatus ticks of which 25% were confirmed to be infected with Babesia canis...
September 6, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28875270/molecular-evidence-of-tick-borne-pathogens-in-hyalomma-anatolicum-ticks-infesting-cattle-in-xinjiang-uygur-autonomous-region-northwestern-china
#17
Peifa Yu, Zhijie Liu, Qingli Niu, Jifei Yang, Mirza Omar Abdallah, Ze Chen, Guangyuan Liu, Jianxun Luo, Hong Yin
Although tick-borne pathogens have been widely reported in ticks in China, there is little information available on the prevalence of information in Hyalomma ticks from cattle. This study aims to determine the occurrence of pathogens in Hyalomma anatolicum collected from cattle in Xinjiang Uygur Autonomous Region, China, by PCR, sequencing and phylogenetic analysis. Borrelia burgdorferi s.s., Rickettsia massiliae and Anaplasma bovis were identified, whereas DNA of Ehrlichia species and an Anaplasma platys-like pathogen were also detected...
September 5, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28869190/year-to-year-variation-in-the-density-of-ixodes-ricinus-ticks-and-the-prevalence-of-the-rodent-associated-human-pathogens-borrelia-afzelii-and-b-miyamotoi-in-different-forest-types
#18
Sanne C Ruyts, Wesley Tack, Evy Ampoorter, Elena C Coipan, Erik Matthysen, Dieter Heylen, Hein Sprong, Kris Verheyen
The human pathogens Borrelia afzelii, which causes Lyme borreliosis and B. miyamotoi, which causes relapsing fever, both circulate between Ixodes ricinus ticks and rodents. The spatiotemporal dynamics in the prevalence of these pathogens have not yet been fully elucidated, but probably depend on the spatiotemporal population dynamics of small rodents. We aimed to evaluate the effect of different forest types on the density of infected nymphs in different years and to obtain more knowledge about the spatial and temporal patterns of ticks and tick-borne pathogens...
August 26, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28865344/heartland-virus-infection-in-hamsters-deficient-in-type-i-interferon-signaling-protracted-disease-course-ameliorated-by-favipiravir
#19
Jonna B Westover, Johanna D Rigas, Arnaud J Van Wettere, Rong Li, Brady T Hickerson, Kie-Hoon Jung, Jinxin Miao, Erin S Reynolds, Bettina L Conrad, Skot Nielson, Yousuke Furuta, Saravanan Thangamani, Zhongde Wang, Brian B Gowen
Heartland virus (HRTV) is an emerging tick-borne virus (Bunyaviridae, Phlebovirus) that has caused sporadic cases of human disease in several central and mid-eastern states of America. Animal models of HRTV disease are needed to gain insights into viral pathogenesis and advancing antiviral drug development. Presence of clinical disease following HRTV challenge in hamsters deficient in STAT2 function underscores the important role played by type I interferon-induced antiviral responses. However, the recovery of most of the infected animals suggests that other mechanisms to control infection and limit disease offer substantial protection...
August 30, 2017: Virology
https://www.readbyqxmd.com/read/28861402/ixodes-scapularis-tick-cells-control-anaplasma-phagocytophilum-infection-by-increasing-the-synthesis-of-phosphoenolpyruvate-from-tyrosine
#20
Alejandro Cabezas-Cruz, Pedro J Espinosa, Dasiel A Obregón, Pilar Alberdi, José de la Fuente
The obligate intracellular pathogen, Anaplasma phagocytophilum, is the causative agent of life-threatening diseases in humans and animals. A. phagocytophilum is an emerging tick-borne pathogen in the United States, Europe, Africa and Asia, with increasing numbers of infected people and animals every year. It is increasingly recognized that intracellular pathogens modify host cell metabolic pathways to increase infection and transmission in both vertebrate and invertebrate hosts. Recent reports have shown that amino acids are central to the host-pathogen metabolic interaction...
2017: Frontiers in Cellular and Infection Microbiology
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