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Ticks and Tick-borne Diseases

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https://www.readbyqxmd.com/read/28433728/vector-competence-of-amblyomma-americanum-acari-ixodidae-for-rickettsia-rickettsii
#1
Michael L Levin, Galina E Zemtsova, Lindsay F Killmaster, Alyssa Snellgrove, Lauren B M Schumacher
Rickettsia rickettsii - the etiologic agent of Rocky Mountain spotted fever (RMSF) - is widely spread across the Americas. In the US, Dermacentor spp. ticks are identified as primary vectors of R. rickettsii and Rhipicephalus sanguineus s.l. has been implicated in transmission of this pathogen in several locations in the Southwest. Conversely, ticks of the genus Amblyomma are recognized vectors of RMSF in Central and South America, but not in the US. A. americanum is one of the most aggressive human-biting ticks in the US, whose geographical range overlaps with that of reported RMSF cases...
April 12, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28416183/inhibition-of-the-in-vitro-growth-of-babesia-bigemina-babesia-caballi-and-theileria-equi-parasites-by-trifluralin-analogues
#2
Marta G Silva, Donald P Knowles, Sandra Antunes, Ana Domingos, Maria A Esteves, Carlos E Suarez
Bovine and equine babesiosis caused by Babesia bovis, Babesia bigemina and Babesia caballi, along with equine theileriosis caused by Theileria equi are global tick-borne hemoprotozoan diseases characterized by fever, anemia, weight losses and abortions. A common feature of these diseases are transition from acute to chronic phases, in which parasites may persist in the hosts for life. Antiprotozoal drugs are important for managing infection and disease. Previous research demonstrated that trifluralin analogues, designated (TFLAs) 1-15, which specifically bind to regions of alpha-tubulin protein in plants and protozoan parasites, have the ability to inhibit the in vitro growth of B...
April 10, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28433730/detection-of-rickettsia-helvetica-and-candidatus-r-tarasevichiae-dna-in-ixodes-persulcatus-ticks-collected-in-northeastern-european-russia-komi-republic
#3
Mikhail Yu Kartashov, Ludmila I Glushkova, Tamara P Mikryukova, Igor V Korabelnikov, Yulia I Egorova, Natalia L Tupota, Elena V Protopopova, Svetlana N Konovalova, Vladimir A Ternovoi, Valery B Loktev
The number of tick-borne infections in the northern European regions of Russia has increased considerably in the last years. In the present study, 676 unfed adult Ixodes persulcatus ticks were collected in the Komi Republic from 2011 to 2013 to study tick-borne rickettsioses. Rickettsia spp. DNA was detected by PCR in 51 (7.6%) ticks. The nucleotide sequence analysis of gltA fragments (765bp) from 51 ticks indicated that 60.8% and 39.2% of the ticks were infected with Rickettsia helvetica and Candidatus R. tarasevichiae, respectively...
April 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28433729/comparative-vertical-transmission-of-rickettsia-by-dermacentor-variabilis-and-amblyomma-maculatum
#4
Emma K Harris, Victoria I Verhoeve, Kaikhushroo H Banajee, Jacqueline A Macaluso, Abdu F Azad, Kevin R Macaluso
The geographical overlap of multiple Rickettsia and tick species coincides with the molecular detection of a variety of rickettsial agents in what may be novel tick hosts. However, little is known concerning transmissibility of rickettsial species by various tick hosts. To examine the vertical transmission potential between select tick and rickettsial species, two sympatric species of ticks, Dermacentor variabilis and Amblyomma maculatum, were exposed to five different rickettsial species, including Rickettsia rickettsii, Rickettsia parkeri, Rickettsia montanensis, Rickettsia amblyommatis, or flea-borne Rickettsia felis...
April 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28411028/extensive-diversity-of-rickettsiales-bacteria-in-ticks-from-wuhan-china
#5
Miao Lu, Jun-Hua Tian, Bin Yu, Wen-Ping Guo, Edward C Holmes, Yong-Zhen Zhang
Rickettsiales bacteria are important agents of (re)emerging infectious diseases, with ticks playing a key role in their evolution and transmission. We collected 1079 hard ticks belonging to five species (Ixodes sinensis, Rhipicephalus microplus, Haemaphysalis flava, Haemaphysalis hystricis and Haemaphysalis longicornis) from cattle and goats in Wuhan city, Hubei province, China. The dominant tick species was H. longicornis (578, 53.57%), followed by R. microplus (354, 32.81%), H. hystricis (62, 5.75%), H. flava (57, 5...
March 24, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28366618/retrospective-molecular-study-on-canine-hepatozoonosis-in-slovakia-does-infection-risk-for-dogs-really-exist
#6
Martina Miterpáková, Martina Komjáti-Nagyová, Zuzana Hurníková, Bronislava Víchová
This study provides the very first evidence of Hepatozoon canis infection in dogs from Slovakia, a Rhipicephalus sanguineus sensu lato free area. In total, 297 red foxes (Vulpes vulpes) and 293 dogs, from three regions of Slovakia, were screened for the presence of H. canis using a conventional 18S rRNA polymerase chain reaction (PCR). Genomic DNA of this blood parasite was detected in 51 (17.1%) foxes from all sampling regions in Slovakia, whereas the overall prevalence in examined dogs was significantly lower, only 1...
March 24, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28359751/the-influence-of-abiotic-and-biotic-factors-on-the-invasion-of-ixodes-scapularis-in-ontario-canada
#7
Katie M Clow, Nicholas H Ogden, L Robbin Lindsay, Pascal Michel, David L Pearl, Claire M Jardine
In northeastern North America, the blacklegged tick, Ixodes scapularis, is the vector of numerous tick-borne pathogens, including the agent of Lyme disease, Borrelia burgdorferi sensu stricto. Since 1990, there has been a rapid spread of I. scapularis northward into the province of Ontario, Canada. Climate change has been implicated as one of the driving factors for the spread of this vector. Other ecological factors also influence survival of I. scapularis populations and may facilitate invasion. The objective of this study was to identify local abiotic and biotic factors of significance for the invasion of I...
March 21, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28344035/larvae-of-ixodiphagus-wasps-hymenoptera-encyrtidae-in-rhipicephalus-sanguineus-sensu-lato-ticks-acari-ixodidae-from-brazil
#8
Marcos Antônio Bezerra Santos, Lucia Oliveira de Macedo, Islanne Barbosa de Souza, Carlos Alberto do Nascimento Ramos, Leucio Câmara Alves, Rafael Antonio Nascimento Ramos, Gílcia Aparecida de Carvalho
The biological control of ticks represents an alternative method to the chemical control, given its ecological-friendly approach. Amongst the alternatives, the use of parasitoids of the genus Ixodiphagus (Hymenoptera: Encyrtidae) has been largely investigated. The aim of this study was to document and molecularly characterize Ixodiphagus wasps in ticks from a tropical region of Brazil. From October 2015 to March 2016, Rhipicephalus sanguineus sensu lato ticks (n=1814) were collected from naturally infested dogs and Ixodiphagus larvae were detected by microscopic examination...
March 21, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28336423/comparative-analysis-of-complete-genome-sequences-of-european-subtype-tick-borne-encephalitis-virus-strains-isolated-from-ixodes-persulcatus-ticks-long-tailed-ground-squirrel-spermophilus-undulatus-and-human-blood-in-the-asian-part-of-russia
#9
T V Demina, S E Tkachev, I V Kozlova, E K Doroshchenko, O V Lisak, O V Suntsova, M M Verkhozina, Yu P Dzhioev, A I Paramonov, A Y Tikunov, N V Tikunova, V I Zlobin, D Ruzek
Tick-borne encephalitis virus (TBEV) is divided into three subtypes: European (TBEV-Eu), Siberian (TBEV-Sib), and Far Eastern (TBEV-FE) subtypes. The geographical range of TBEV-Eu dominates in Europe, but this subtype is present focally across the whole non-tropical forested Eurasian belt, through Russia to South Korea. However, the TBEV-Eu strains isolated outside Europe remain poorly characterized. In this study, full-genome sequences of eight TBEV-Eu isolates were determined. These strains were isolated from Ixodes persulcatus ticks, long-tailed ground squirrel (Spermophilus undulatus), and human blood in the natural foci of Western and Eastern Siberia, Russia...
March 9, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28320640/a-comparative-test-of-ixodid-tick-identification-by-a-network-of-european-researchers
#10
A Estrada-Peña, G D'Amico, A M Palomar, M Dupraz, M Fonville, D Heylen, M A Habela, S Hornok, L Lempereur, M Madder, M S Núncio, D Otranto, M Pfaffle, O Plantard, M M Santos-Silva, H Sprong, Z Vatansever, L Vial, A D Mihalca
This study reports the results of a comparative test of identification of ticks occurring in Western Europe and Northern Africa. A total of 14 laboratories were voluntarily enrolled in the test. Each participant received between 22 and 25 specimens of adult and nymphal ticks of 11 species: Dermacentor marginatus, D. reticulatus, Haemaphysalis punctata, Hyalomma lusitanicum, Hy. marginatum, Ixodes ricinus, I. hexagonus, Rhipicephalus annulatus, R. bursa, R. rossicus, and/or R. sanguineus s.l. Ticks were morphologically identified by three of the co-authors and the identification confirmed by a fourth co-author who used molecular methods based on several genes...
March 8, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28286142/ixodoidea-of-the-western-palaearctic-a-review-of-available-literature-for-identification-of-species
#11
REVIEW
Agustín Estrada-Peña, Miriam Pfäffle, Gad Baneth, Gabriela Kleinerman, Trevor N Petney
We aim to produce a review of the most important literature references necessary for the identification of ticks of the families Ixodidae and Argasidae in Europe and northern Africa (i.e. the Western Palaearctic region). The purpose of this paper is to pinpoint a set of critically selected papers that contain reliable information on morphology, taxonomic keys, and comparative discussions which are critical for the identification of the ticks reported in the target region. When necessary, comments are provided on the systematic position of a species, or on suitable papers already addressing the issue...
March 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28286144/characterization-of-theileria-equi-genotypes-in-horses-in-israel-the-palestinian-authority-and-jordan
#12
Dafna Ketter-Ratzon, Sharon Tirosh-Levy, Yaarit Nachum-Biala, Tal Saar, Lara Qura'n, Doni Zivotofsky, Ziad Abdeen, Gad Baneth, Amir Steinman
Equine theileriosis caused by Theileria equi is endemic in the Middle East, where it causes a severe disease as well as widespread subclinical infection. The aim of this study was to evaluate the diversity of T. equi genotypes in Israel and the neighboring Palestinian Authority and Jordan. Blood samples from 355 horses from Israel, the Palestinian Authority and Jordan were tested for the prevalence of T. equi DNA. Two hundred and fourteen (60%) were found positive for T. equi infection by PCR. Of those, the 18S rRNA (1458bp) and the EMA-1 (745bp) genes of T...
March 4, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28286143/detection-of-crimean-congo-hemorrhagic-fever-virus-specific-igg-antibodies-in-ruminants-residing-in-central-and-western-macedonia-greece
#13
Isolde Schuster, Serafeim C Chaintoutis, Chrysostomos I Dovas, Martin H Groschup, Marc Mertens
Crimean-Congo hemorrhagic fever virus (CCHFV) is a tick-borne virus which causes lethal hemorrhagic fever in humans. Although, several reports regarding CCHFV antibody prevalence in humans exist in Greece, information about the current distribution is limited. The aim of the present study is to investigate the prevalence of CCHFV-specific IgG antibodies in cattle and sheep in Macedonia-Greece. The samplings were performed during spring 2013, in 5 regional units of Central Macedonia (Chalkidiki, Imathia, Kilkis, Pella and Thessaloniki) and in the 4 regional units of Western Macedonia (Grevena, Florina, Kastoria and Kozani)...
March 3, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28279630/a-scorpion-buthus-ibericus-killing-an-engorged-tick
#14
LETTER
Anders Lindström
No abstract text is available yet for this article.
March 2, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28286145/splenic-dysfunction-from-celiac-disease-resulting-in-severe-babesiosis
#15
Sarah O'Connell, Craig Lyons, Moustafa Abdou, Rittick Patowary, Salman Aslam, Nora Kinsella, Annetta Zintl, Klaus-Peter Hunfeld, Gary P Wormser, Jeremy Gray, Concepta Merry, Hussain Alizadeh
We describe a 79-year-old Irish man who, because he had hyposplenism and splenic atrophy due to adult celiac disease, became critically ill from a severe Babesia divergens infection. Greater awareness of the possible consequences of splenic dysfunction from adult celiac disease, such as serious pneumococcal infections and babesiosis, is warranted.
February 28, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28274808/diversity-of-rickettsiae-in-a-rural-community-in-northern-california
#16
Nicole Stephenson, Alexandra Blaney, Deana Clifford, Mourad Gabriel, Greta Wengert, Patrick Foley, Richard N Brown, Mark Higley, Sarah Buckenberger-Mantovani, Janet Foley
Far northern California forests are highly biodiverse in wildlife reservoirs and arthropod vectors that may propagate rickettsial pathogens in nature. The proximity of small rural communities to these forests puts people and domestic animals at risk of vector-borne infection due to spillover from wildlife. The current study was conducted to document exposure to rickettsial pathogens in people and domestic animals in a rural community, and identify which rickettsiae are present in sylvatic and peri-domestic environments near this community...
February 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28268195/-candidatus-rickettsia-nicoyana-a-novel-rickettsia-species-isolated-from-ornithodoros-knoxjonesi-in-costa-rica
#17
Rolando D Moreira-Soto, Andrés Moreira-Soto, Eugenia Corrales-Aguilar, Ólger Calderón-Arguedas, Adriana Troyo
Rickettsiae are intracellular bacteria commonly associated with hematophagous arthropods. Most of them have been described in hard ticks, but some have been found in soft ticks. Here we report the detection and isolation of a new Rickettsia from Ornithodoros knoxjonesi larvae collected from Balantiopteryx plicata (Emballonuridae) in Nicoya, Costa Rica. Two ticks were processed to detect Rickettsia spp. genes gltA, ompA, ompB, and htrA by PCR. Part of the macerate was also inoculated into Vero E6 and C6/36 cell lines, and cells were evaluated by Giménez stain, indirect immunofluorescence assay (IFA), and PCR...
February 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28262480/presence-of-borrelia-in-different-populations-of-ixodes-pararicinus-from-northwestern-argentina
#18
Maria N Saracho Bottero, Patrick S Sebastian, Luis A Carvalho, Leonor Guardia Claps, Mariano Mastropaolo, Atilio J Mangold, José M Venzal, Santiago Nava
This work was performed to evaluate the presence of Borrelia in different populations of Ixodes pararicinus from northwestern Argentina (Jujuy, Salta and Tucumán provinces). Questing adults and nymphs of I. pararicinus were collected from vegetation, and I. pararicinus nymphs were also collected on birds. Eighty-two ticks were tested for Borrelia presence by PCR targeting the gene flagellin and the rrfA-rrlB intergenic spacer region. Pools of ticks positive to Borrelia were formed by two nymphs collected on Turdus rufiventris in Tucumán, one nymph collected on Syndactyla rufosuperciliata in Jujuy, one nymph collected on Turdus nigriceps in Tucumán, three nymphs collected on T...
February 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28259592/ambush-behavior-of-the-tick-amblyomma-sculptum-amblyomma-cajennense-complex-acari-ixodidae-in-the-brazilian-pantanal
#19
Vanessa do Nascimento Ramos, Carolina Fonseca Osava, Ubiratan Piovezan, Matias Pablo Juan Szabó
We herein describe the ambush behavior of Amblyomma sculptum (Berlese 1888), a widespread and epidemiologically important tick in Brazil. Along two years of sampling by visual search in the Brazilian Pantanal, A. sculptum ticks were observed on the vegetation and in the leaf litter. Most of the ticks were observed between 10 and 50cm above ground level and less than five percent of the total were positioned below 10cm, indicating that they are seeking for middle or large-sized hosts. In both seasons, vapor saturation deficit was low during the morning...
February 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28238642/detection-of-borrelia-burgdorferi-sensu-lato-and-anaplasma-phagocytophilum-in-questing-ticks-ixodes-ricinus-from-the-czech-republic
#20
Kateřina Kybicová, Kateřina Baštová, Marek Malý
The aim of the present study is to compare the prevalence of Borrelia burgdorferi sensu lato (s.l.) and Anaplasma phagocytophilum in questing ticks by using molecular methods from spring to autumn 2007. A total of 526 Ixodes ricinus ticks were collected from vegetation in three different sampling sites, representing an urban area (city park), a suburban area (village) and a natural montane habitat. The prevalence of B. burgdorferi s.l. was 17.3% (7.5% in males, 18.7% in females and 20.2% in nymphs), while 4...
February 20, 2017: Ticks and Tick-borne Diseases
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