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Ornithodoros

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https://www.readbyqxmd.com/read/29145396/detection-of-relapsing-fever-borrelia-spp-bartonella-spp-and-anaplasmataceae-bacteria-in-argasid-ticks-in-algeria
#1
Ismail Lafri, Basma El Hamzaoui, Idir Bitam, Hamza Leulmi, Reda Lalout, Oleg Mediannikov, Mohamed Chergui, Mohamed Karakellah, Didier Raoult, Philippe Parola
BACKGROUND: Argasid ticks (soft ticks) are blood-feeding arthropods that can parasitize rodents, birds, humans, livestock and companion animals. Ticks of the Ornithodoros genus are known to be vectors of relapsing fever borreliosis in humans. In Algeria, little is known about relapsing fever borreliosis and other bacterial pathogens transmitted by argasid ticks. METHODOLOGY/PRINCIPAL FINDINGS: Between May 2013 and October 2015, we investigated the presence of soft ticks in 20 rodent burrows, 10 yellow-legged gull (Larus michahellis) nests and animal shelters in six locations in two different bioclimatic zones in Algeria...
November 16, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29114154/comparative-efficacy-of-commercial-preparation-of-deltamethrin-and-cypermethrin-against-ornithodoros-spp-of-north-gujarat
#2
Neelu Sharma, Veer Singh, K P Shyma, H R Parsani
Ticks have massive capacity of acting as vectors of numerous pathogens that affect human, livestock and pets, which owes to their medical and veterinary importance. In animals, tick infestations are much more severe than in humans. Animals can be parasitized by hundreds or even thousands of ticks, which then proliferates the effect on the host. In almost all tropical and subtropical countries like India not only the hard ticks (Ixodidae) but also the soft ticks (Agrasidae) are responsible for economic losses either by direct injuries or disease transmission...
December 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/29084219/ecological-niche-modeling-and-distribution-of-ornithodoros-hermsi-associated-with-tick-borne-relapsing-fever-in-western-north-america
#3
Kylie M Sage, Tammi L Johnson, Michael B Teglas, Nathan C Nieto, Tom G Schwan
Tick-borne relapsing fever in western North America is a zoonosis caused by the spirochete bacterium, Borrelia hermsii, which is transmitted by the bite of infected Ornithodoros hermsi ticks. The pathogen is maintained in natural cycles involving small rodent hosts such as chipmunks and tree squirrels, as well as the tick vector. In order for these ticks to establish sustained and viable populations, a narrow set of environmental parameters must exist, primarily moderate temperatures and moderate to high amounts of precipitation...
October 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28943886/sleeping-site-ecology-but-not-sex-affect-ecto-and-hemoparasite-risk-in-sympatric-arboreal-primates-avahi-occidentalis-and-lepilemur-edwardsi
#4
May Hokan, Christina Strube, Ute Radespiel, Elke Zimmermann
BACKGROUND: A central question in evolutionary parasitology is to what extent ecology impacts patterns of parasitism in wild host populations. In this study, we aim to disentangle factors influencing the risk of parasite exposure by exploring the impact of sleeping site ecology on infection with ectoparasites and vector-borne hemoparasites in two sympatric primates endemic to Madagascar. Both species live in the same dry deciduous forest of northwestern Madagascar and cope with the same climatic constraints, they are arboreal, nocturnal, cat-sized and pair-living but differ prominently in sleeping site ecology...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28921895/genetic-characterization-of-african-swine-fever-virus-isolates-from-soft-ticks-at-the-wildlife-domestic-interface-in-mozambique-and-identification-of-a-novel-genotype
#5
C J Quembo, F Jori, W Vosloo, L Heath
African swine fever virus (ASFV) is one of the most threatening infectious diseases of pigs. There are not sufficient data to indicate the importance of the sylvatic cycle in the spread and maintenance of the disease locally and potentially, globally. To assess the capacity to maintain ASF in the environment, we investigated the presence of soft tickreservoirs of ASFV in Gorongosa National Park (GNP) and its surrounding villages. A total of 1,658 soft ticks were recovered from warthog burrows and pig pens at the wildlife/livestock interface of the GNP and viral DNA was confirmed by nested PCR in 19% of Ornithodoros porcinus porcinus and 15% of O...
September 17, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28807279/acaricidal-activity-of-fluralaner-against-ornithodoros-moubata-and-ornithodoros-erraticus-argasid-ticks-evaluated-through-in-vitro-feeding
#6
R Pérez-Sánchez, A Oleaga
Ornithodoros erraticus and Ornithodoros moubata are argasid tick vectors that transmit severe diseases such as African swine fever and human relapsing fever. Elimination of the synanthropic populations of these vectors would facilitate the control of these diseases. Fluralaner is a novel isoxazoline that selectively blocks the GABA- and glutamate-gated channels, providing potent insecticidal and acaricidal activity. The aim of the current study was to provide quantitative data on the susceptibility of males, females and third nymphal instar of O...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28764815/a-proteomic-insight-into-the-midgut-proteome-of-ornithodoros-moubata-females-reveals-novel-information-on-blood-digestion-in-argasid-ticks
#7
Ana Oleaga, Prosper Obolo-Mvoulouga, Raúl Manzano-Román, Ricardo Pérez-Sánchez
BACKGROUND: The argasid tick Ornithodoros moubata is the main African vector of the human relapsing fever agent Borrelia duttoni and the African swine fever virus. Together with saliva, the tick midgut forms part of the host-tick-pathogen interface, and numerous midgut proteins play key functions in the blood digestion-related process and the infection and transmission of pathogens. This work explores the composition of the midgut proteome of unfed and fed O. moubata females with the aim to complete the biological information already obtained from the midgut transcriptome and provide a more robust and comprehensive perspective of this biological system...
August 1, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28746449/gut-transcriptome-analysis-on-females-of-ornithodoros-mimon-acari-argasidae-and-phylogenetic-inference-of-ticks
#8
Gabriel Alves Landulfo, José Salvatore Leister Patané, Dalton Giovanni Nogueira da Silva, Inácio Loiola Meirelles Junqueira-de-Azevedo, Ronaldo Zucatelli Mendonca, Simone Michaela Simons, Eneas de Carvalho, Darci Moraes Barros-Battesti
Ornithodoros mimon is an argasid tick that parasitizes bats, birds and opossums and is also harmful to humans. Knowledge of the transcripts present in the tick gut helps in understanding the role of vital molecules in the digestion process and parasite-host relationship, while also providing information about the evolution of arthropod hematophagy. Thus, the present study aimed to know and ascertain the main molecules expressed in the gut of argasid after their blood meal, through analysis on the gut transcriptome of engorged females of O...
April 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28713775/salivary-tick-cystatin-omc2-targets-lysosomal-cathepsins-s-and-c-in-human-dendritic-cells
#9
Tina Zavašnik-Bergant, Robert Vidmar, Andreja Sekirnik, Marko Fonović, Jiří Salát, Lenka Grunclová, Petr Kopáček, Boris Turk
To ensure successful feeding tick saliva contains a number of inhibitory proteins that interfere with the host immune response and help to create a permissive environment for pathogen transmission. Among the potential targets of the salivary cystatins are two host cysteine proteases, cathepsin S, which is essential for antigen- and invariant chain-processing, and cathepsin C (dipeptidyl peptidase 1, DPP1), which plays a critical role in processing and activation of the granule serine proteases. Here, the effect of salivary cystatin OmC2 from Ornithodoros moubata was studied using differentiated MUTZ-3 cells as a model of immature dendritic cells of the host skin...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28620577/population-structure-of-the-soft-tick-ornithodoros-maritimus-and-its-associated-infectious-agents-within-a-colony-of-its-seabird-host-larus-michahellis
#10
Marlene Dupraz, Céline Toty, Elodie Devillers, Thomas Blanchon, Eric Elguero, Marion Vittecoq, Sara Moutailler, Karen D McCoy
The epidemiology of vector-borne zoonoses depends on the movement of both hosts and vectors, which can differ greatly in intensity across spatial scales. Because of their life history traits and small size, vector dispersal may be frequent, but limited in distance. However, little information is available on vector movement patterns at local spatial scales, and particularly for ticks, transmitting the greatest diversity of recognized infectious agents. To test the degree to which ticks can disperse and disseminate pathogens at local scales, we investigated the temporal dynamics and population structure of the soft tick Ornithodoros maritimus within a colony of its seabird host, the Yellow-legged gull Larus michahellis...
August 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28528879/functional-annotation-and-analysis-of-the-ornithodoros-moubata-midgut-genes-differentially-expressed-after-blood-feeding
#11
Ana Oleaga, Prosper Obolo-Mvoulouga, Raúl Manzano-Román, Ricardo Pérez-Sánchez
The argasid tick Ornithodoros moubata is the main vector of the African swine fever and the human relapsing fever in Africa. As part of the host-parasite-pathogen interface, the tick midgut expresses key proteins for tick survival and tick-borne pathogen transmission. Accordingly, midgut proteins are potential targets for the development of new drugs and vaccines aimed at tick control, and obtaining proteomic and transcriptomic data from the O. moubata midgut would facilitate the identification of such target candidates...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28506539/description-of-a-new-soft-tick-species-acari-argasidae-ornithodoros-associated-with-stream-breeding-frogs-anura-cycloramphidae-cycloramphus-in-brazil
#12
Sebastián Muñoz-Leal, Luís Felipe Toledo, José M Venzal, Arlei Marcili, Thiago F Martins, Igor C L Acosta, Adriano Pinter, Marcelo B Labruna
In this study, we present a morphological description of immature and adult specimens of Ornithodoros saraivai n. sp., a tick associated with the frog Cycloramphus boraceiensis (Cycloramphidae) at São Sebastião island, located in the São Paulo state seaboard, Brazil. While larvae of O. saraivai are ecologically related to Ornithodoros faccinii, another soft tick associated with cycloramphids, the combination of 7 sternal pairs, 16 dorsal pairs, a pyriform dorsal plate and a partially toothed hypostome constitute unique characters of the O...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28489063/african-swine-fever-virus-a-review
#13
REVIEW
Inmaculada Galindo, Covadonga Alonso
African swine fever (ASF) is a highly contagious viral disease of swine which causes high mortality, approaching 100%, in domestic pigs. ASF is caused by a large, double stranded DNA virus, ASF virus (ASFV), which replicates predominantly in the cytoplasm of macrophages and is the only member of the Asfarviridae family, genus Asfivirus. The natural hosts of this virus include wild suids and arthropod vectors of the Ornithodoros genus. The infection of ASFV in its reservoir hosts is usually asymptomatic and develops a persistent infection...
May 10, 2017: Viruses
https://www.readbyqxmd.com/read/28426405/molecular-evidence-and-additional-morphological-characters-to-distinguish-ornithodoros-brodyi-and-ornithodoros-yumatensis-ixodida-argasidae-in-their-different-developmental-stages
#14
Carmen Guzmán-Cornejo, Luis García-Prieto, Andrea Rebollo-Hernández, José M Venzal, Santiago Nava, Sokani Sánchez-Montes
Ornithodoros brodyi and Ornithodoros yumatensis are two species distributed in the Americas and associated with bats and caves. Both species have similar morphology, and the diagnostic traits of adults have not been detailed or illustrated accurately. In this study, the independence of both species is validated on the basis of molecular evidence (using partial sequences of 16S rDNA gene), and the morphological differences between them (dentition of the hypostome and traits of individual mammillae) are confirmed through light and scanning electron microscopy...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28399292/an-in-vitro-blood-feeding-method-revealed-differential-borrelia-turicatae-spirochaetales-spirochaetaceae-gene-expression-after-spirochete-acquisition-and-colonization-in-the-soft-tick-ornithodoros-turicata-acari-argasidae
#15
Girish Neelakanta, Hameeda Sultana, Daniel E Sonenshine, Richard T Marconi
In the Midwestern, Southwestern, and Southern part of the United States, the soft tick Ornithodoros turicata transmits the spirochete Borrelia turicatae, the causative agent of relapsing fever in humans. In this study, we report a simplified and an efficient method of in vitro feeding to evaluate O. turicata-B. turicatae interactions. Both nymphal and adult female ticks successfully acquired spirochetes upon in vitro feeding on the B. turicatae-infected blood. We also noted transstadial transmission of spirochetes to adult ticks that were molted from nymphs fed on B...
March 1, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28399204/detection-of-a-novel-rickettsia-from-leptotrombidium-scutellare-mites-acari-trombiculidae-from-shandong-of-china
#16
Yuting Huang, Li Zhao, Zhentang Zhang, Miaomiao Liu, Zaifeng Xue, Dongqiang Ma, Xifeng Sun, Yue Sun, Chuanmin Zhou, Xiangrong Qin, Yelei Zhu, Wenqian Li, Hao Yu, Xue-Jie Yu
Leptotrombidium scutellare mites, the vector of Orientia tsutsugamushi, have rarely been reported to associate with Rickettsia species. Three hundred nineteen chiggers were collected from the ears of 32 rodents captured in Huangdao District of Qingdao City, China, in October 2015. The chigger samples were tested for Rickettsia, severe fever with thrombocytopenia syndrome virus, and hantavirus by PCR or RT-PCR amplification. All mites were classified morphologically and molecularly as L. scutellare chiggers...
May 1, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28286142/ixodoidea-of-the-western-palaearctic-a-review-of-available-literature-for-identification-of-species
#17
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/28268195/-candidatus-rickettsia-nicoyana-a-novel-rickettsia-species-isolated-from-ornithodoros-knoxjonesi-in-costa-rica
#18
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/28258298/complement-factor-5-blockade-reduces-porcine-myocardial-infarction-size-and-improves-immediate-cardiac-function
#19
Soeren E Pischke, A Gustavsen, H L Orrem, K H Egge, F Courivaud, H Fontenelle, A Despont, A K Bongoni, R Rieben, T I Tønnessen, M A Nunn, H Scott, H Skulstad, A Barratt-Due, T E Mollnes
Inhibition of complement factor 5 (C5) reduced myocardial infarction in animal studies, while no benefit was found in clinical studies. Due to lack of cross-reactivity of clinically used C5 antibodies, different inhibitors were used in animal and clinical studies. Coversin (Ornithodoros moubata complement inhibitor, OmCI) blocks C5 cleavage and binds leukotriene B4 in humans and pigs. We hypothesized that inhibition of C5 before reperfusion will decrease infarct size and improve ventricular function in a porcine model of myocardial infarction...
May 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28238286/a-13-year-old-girl-with-pancytopenia-at-the-presentation-of-a-borrelia-hispanica-infection-a-case-report-and-review-of-the-literature
#20
REVIEW
Irmin Leen, Peggy Bruynseels, Benoît Kabamba Mukadi, Mark van Oort, Machiel van den Akker
BACKGROUND: It is not uncommon that a child with a febrile illness of unknown etiology is admitted to the hospital. When the complete blood count reveals a pancytopenia, the diagnostic process can be a real challenge. CASE PRESENTATION: A 13-year girl of Arab-Berber descent presented with abdominal pain and fever after a holiday in northwestern Morocco. A complete blood count revealed a pancytopenia and blood smear test results revealed spirochetes. Borrelia hispanica was identified by sequencing the 16S ribosomal ribonucleic acid gene...
February 27, 2017: Journal of Medical Case Reports
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