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Ticks and Tick-borne Diseases

Daniela Lamattina, Evelina Luisa Tarragona, Santiago Nava
Human rickettsioses caused by Rickettsia parkeri strain Atlantic rainforest in Brazil motivated the analysis of Amblyomma ovale ticks in Misiones province, a similar ecological region in northeastern Argentina. During 2010-2017, 393 A. ovale ticks were collected from domestic and wild animals and from vegetation, and 177 were pooled for rickettsial detection by PCR targeting the gltA, ompA and ompB genes. A sample consisting of a pool of two A. ovale adults collected on Nasua nasua was positive for Rickettsia parkeri strain Atlantic rainforest...
May 5, 2018: Ticks and Tick-borne Diseases
Angélica Hernández-Jarguín, Sandra Díaz-Sánchez, Margarita Villar, José de la Fuente
An innovative metaomics approach integrating metatranscriptomics and metaproteomics was used to characterize bacterial communities in the microbiota of the Lyme borreliosis spirochete vector, Ixodes ricinus (Acari: Ixodidae). Whole internal tissues and salivary glands from unfed larvae and female ticks, respectively were used. Reused I. ricinus RNA-sequencing data for metranscriptomics analysis together with metaproteomics provided a better characterization of tick bacterial microbiota by increasing bacteria identification and support for identified bacteria with putative functional implications...
May 5, 2018: Ticks and Tick-borne Diseases
Shunya Shibata, Thillaiampalam Sivakumar, Ikuo Igarashi, Rika Umemiya-Shirafuji, Hisashi Inokuma, Shinya Fukumoto, Naoaki Yokoyama
Species of Theileria are tick-borne hemoprotozoan parasites of ruminants that can cause severe clinical disease. In this study, blood samples were obtained from 91 wild sika deer in various districts in Hokkaido, Japan. Samples were tested using a PCR assay designed to amplify a full-length major piroplasm surface protein (MPSP) gene of a cervine Theileria species, designated as Theileria sp. (sika 1). The amplicons of 57 out of 89 PCR-positive samples were cloned and sequenced. The sequences shared 99.1%-100% identity scores, indicating the MPSP gene of Theileria sp...
May 4, 2018: Ticks and Tick-borne Diseases
João F Soares, Francisco B Costa, Aline Girotto-Soares, Aleksandro S Da Silva, Raqueli T França, Sueli A Taniwaki, Bruno Dall'Agnol, José Reck, Mitika K Hagiwara, Marcelo B Labruna
Rangelia vitalii is the etiologic agent of canine rangeliosis, a severe piroplasmosis that affects domestic dogs in Brazil, Uruguay and Argentina. While R. vitalii is one of the most pathogenic tick-borne pathogens for dogs in the world, its tick vector has remained unknown. The present study evaluated the vector competence of Rhipicephalus sanguineus sensu lato (both tropical and temperate species), Amblyomma aureolatum, Amblyomma ovale, Amblyomma tigrinum, and Amblyomma sculptum for R. vitalii. These six tick species were selected for the study because they comprise the main tick species infesting dogs within the distribution area of canine rangeliosis in South America...
May 4, 2018: Ticks and Tick-borne Diseases
Giuseppe Manna, Antonella Cersini, Roberto Nardini, Leticia Elisa Bartolomé Del Pino, Valeria Antognetti, Maurizio Zini, Raffaella Conti, Raniero Lorenzetti, Vincenzo Veneziano, Gian Luca Autorino, Maria Teresa Scicluna
Babesia caballi and Theileria equi are tick-borne pathogens causing equine piroplasmosis infecting the Equidae family in which they cause significant sanitary and economic losses. Furthermore, equine piroplasmosis is included in the World Animal Health Organization (OIE) notifiable diseases list with possible movement restrictions for positive horses. Thirty-nine EDTA and whole-blood samples collected during 2013 and 2014 from symptomatic and asymptomatic horses of Central-Southern Italy were included in the present study either because of their strongly positive results in Real Time (RT) PCRs targeting the 18S rRNA gene specific for each piroplasm and/or due to their serological ELISA/18S rRNA RT-PCR discordant results...
May 4, 2018: Ticks and Tick-borne Diseases
Eva Špitalská, Olivier Sparagano, Michal Stanko, Katarína Schwarzová, Zdenko Špitalský, Ľudovít Škultéty, Sabína Fumačová Havlíková
Ticks are important vectors of pathogens affecting humans and animals worldwide. They do not only carry pathogens but diverse commensal and symbiotic microorganisms are also present in ticks. A molecular screening for tick-borne pathogens and endosymbionts was carried out in Ixodes ricinus, Dermacentor reticulatus and Haemaphysalis inermis questing ticks collected in Slovakia. The presence of Rickettsia spp., Coxiella burnetii, Coxiella-like and Francisella-like microorganisms was evaluated by PCR in 605 individuals and by randomly sequencing 66 samples...
May 3, 2018: Ticks and Tick-borne Diseases
Paula Lado, Barbara Qurollo, Cathy Williams, Randall Junge, Hans Klompen
Lemurs are primate species that are endemic to Madagascar. At present, about 90% of lemur species are endangered, and 5 species are among the 25 most endangered primates worldwide. Health status is a major factor impacting the viability of wild populations of many endangered species including lemurs. Given this context, we analyzed the microbiome of 24 specimens of Haemaphysalis lemuris, the most common tick parasitizing lemurs in their native habitats. Ticks were collected from 6 lemur species and microbiomes analyzed using next-generation sequencing...
May 2, 2018: Ticks and Tick-borne Diseases
Kwang-Min Yu, Min-Ah Yu, Su-Jin Park, Young-Il Kim, Norbert John Robles, Hyeok-Il Kwon, Eun-Ha Kim, Young-Jae Si, Hiep Dinh Nguyen, Young Ki Choi
Severe fever with thrombocytopenia syndrome (SFTS) is a newly emerging tick-borne infectious disease caused by the SFTS virus (SFTSV). To investigate the prevalence of SFTSV in domestic goats in South Korea, we collected blood samples in commercial slaughterhouses in Chungbuk Province in 2017. Of the 207 samples tested, 4 (2%) were found to be positive for viral RNA by RT-PCR and 30 (14.4%) were positive for SFTSV antibody as detected by a nucleocapsid (NP) protein-based ELISA. Phylogenetic analysis of the non-structural protein (NS) sequences showed that all viruses belonged to the genotype B, although they were clustered into two different sublineages that showed the highest homology with the KR612076-JP01 and KY789441-CB3 human isolate from South Korea...
May 2, 2018: Ticks and Tick-borne Diseases
Prosper Obolo-Mvoulouga, Ana Oleaga, Raúl Manzano-Román, Ricardo Pérez-Sánchez
The African argasid tick Ornithodoros moubata transmits two important pathogens, the African swine fever virus and the spirochete Borrelia duttoni, the cause of human relapsing fever. To date, only conventional control measures such as widespread application of acaricides, strict control measures, and animal movement restrictions have been implemented to confine these diseases. Vaccines against tick infestations have the potential to be among the most efficacious interventions for the management of these diseases...
April 30, 2018: Ticks and Tick-borne Diseases
Evelina L Tarragona, Patrick S Sebastian, María N Saracho Bottero, Emilia I Martinez, Valeria N Debárbora, Atilio J Mangold, Alberto A Guglielmone, Santiago Nava
The aim of this work was to generate knowledge on ecological aspects of Amblyomma sculptum in Argentina, such as seasonal dynamics, geographical range size, hosts, genetic diversity and phylogeography. Adult and immature A. sculptum ticks were collected in different localities of Argentina to know the geographical range size and hosts. The genetic diversity of this tick was studied through analyses of 16S rDNA sequences. To describe the seasonal dynamics, free-living ticks were monthly collected from October 2013 to October 2015...
April 27, 2018: Ticks and Tick-borne Diseases
Dickson Stuart Tayebwa, Bumduuren Tuvshintulga, Azirwan Guswanto, Arifin Budiman Nugraha, Gaber El-Saber Batiha, Sambuu Gantuya, Mohamed Abdo Rizk, Patrick Vudriko, Thillaiampalam Sivakumar, Naoaki Yokoyama, Ikuo Igarashi
The treatment of bovine and equine piroplasmosis is limited to diminazene aceturate (DA) and imidocarb dipropionate. To address this challenge, we need to explore novel drug compounds and targets. Topoisomerases are potential drug targets because they play a vital role in solving topological errors of DNA strands during replication. This study documented the effectiveness of topoisomerase inhibitors, nitidine chloride (NC) and camptothecin (Cpt), on the growth of Babesia and Theileria parasites. The half maximal inhibitory concentrations (IC50 s) against B...
April 27, 2018: Ticks and Tick-borne Diseases
Annika Brinkmann, Ender Dinçer, Ceylan Polat, Olcay Hekimoğlu, Sabri Hacıoğlu, Katalin Földes, Aykut Özkul, İbrahim Mehmet Ali Öktem, Andreas Nitsche, Koray Ergünay
We employed a direct metagenomic approach via next-generation sequencing for a cross-sectional investigation of viruses in 10 tick pools, collected from Aegean, Mediterranean and central Anatolian locations in Turkey. Sequences from all genome segments of Tamdy orthonairovirus (family Nairoviridae) were characterized in ticks collected from a Meriones tristrami. We further obtained near-complete L and partial S segments of several tick-associated phleboviruses (family Phenuiviridae), including Tacheng tick virus 2 and a novel virus, tentatively named as the tick phlebovirus Anatolia...
April 27, 2018: Ticks and Tick-borne Diseases
Jun-Gu Kang, Yoon-Kyoung Cho, Yong-Sun Jo, Jeong-Byoung Chae, Sung-Suck Oh, Kye-Hyung Kim, Mee-Kyung Ko, Jongyoun Yi, Kyoung-Seong Choi, Do-Hyeon Yu, Hyeon-Cheol Kim, Jinho Park, Bae-Keun Park, Chang-Yong Choi, Young-Hun Jung, Joon-Seok Chae
Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging tick-borne pathogen in China, Japan, and the Republic of Korea (ROK). The aim of this study was to investigate the prevalence of SFTSV antigens and anti-SFTSV antibodies in black goats (Capra hircus coreanae) throughout the ROK. Sera were collected from 737 black goats in nine provinces in the ROK. Eighteen of 737 (2.4%) goat sera were positive for SFTSV on one-step reverse transcription nested polymerase chain reaction. The amplified 346-bp S segments of SFTSV sequences were classified into three genotypes (BG1, BG2, and BG3), and were included in the Japanese clade rather than the Chinese clade, based on phylogenetic analysis...
April 26, 2018: Ticks and Tick-borne Diseases
Ashutosh Fular, Anil Kumar Sharma, Sachin Kumar, Gaurav Nagar, Gajanan Chigure, D D Ray, Srikant Ghosh
Tick-borne diseases is a global threat and tick resistance to commonly used acaricides is a growing problem, thus calling for improved resistance monitoring tools. To aid in monitoring of resistance in field tick populations, a resistant colony of Rhipicephalus microplus was characterized with the aim to establish a reference multi-acaricide resistant tick strain. Using a standardized adult immersion test, the Lethal Concentration(LC)50 values for deltamethrin, cypermethrin, fenvalerate and diazinon against the laboratory selected resistant tick (LSRT) strain were determined as 306...
April 22, 2018: Ticks and Tick-borne Diseases
Sanne C Ruyts, Dries Landuyt, Evy Ampoorter, Dieter Heylen, Steffen Ehrmann, Elena C Coipan, Erik Matthysen, Hein Sprong, Kris Verheyen
An increasing number of studies have investigated the consequences of biodiversity loss for the occurrence of vector-borne diseases such as Lyme borreliosis, the most common tick-borne disease in the northern hemisphere. As host species differ in their ability to transmit the Lyme borreliosis bacteria Borrelia burgdorferi s.l. to ticks, increased host diversity can decrease disease prevalence by increasing the proportion of dilution hosts, host species that transmit pathogens less efficiently. Previous research shows that Lyme borreliosis risk differs between forest types and suggests that a higher diversity of host species might dilute the contribution of small rodents to infect ticks with B...
April 22, 2018: Ticks and Tick-borne Diseases
Daniel Benitez, Maria Mesplet, Ignacio Echaide, Susana Torioni de Echaide, Leonhard Schnittger, Monica Florin-Christensen
Water buffaloes (Bubalus bubalis) are raised in tropical and subtropical regions of the world, and act as hosts of Babesia bovis parasites and the tick vector Rhipicephalus microplus. As no clinical cases of B. bovis-infection have been reported, we hypothesized that, unlike bovines, water buffaloes respond asymptomatically to an acute infection. To test this hypothesis, we inoculated two groups of 24-month-old Mediterranean breed water buffaloes with 108 erythrocytes infected with two Argentine B. bovis isolates: BboM2P (n = 5) or BboS2P (n = 5)...
April 20, 2018: Ticks and Tick-borne Diseases
Mateusz Markowicz, Anna-Margarita Schötta, Michael Kundi, Petra Bogovič, Katarina Ogrinc, Franc Strle, Gerold Stanek
The aims of the study were to determine and compare the concentration of CXCL13 in cerebrospinal fluid (CSF) of patients with Lyme neuroborreliosis (LNB) and various other neurological disorders applying a Luminex based assay and ELISA, and to find factors associated with CXCL13 concentration. CSF samples obtained from four clinically well-defined groups of patients (proven LNB, suspected LNB, tick-borne encephalitis (TBE), and aseptic meningitis/meningoencephalitis other than TBE) - 25 samples per group - were analyzed...
April 20, 2018: Ticks and Tick-borne Diseases
Felipe S Krawczak, Marcelo B Labruna
Rickettsia parkeri strain Atlantic rainforest (SAR) is the etiological agent of a spotted fever group rickettsiosis in Brazil, where it is transmitted to humans by the tick Amblyomma ovale. A previous study demonstrated that R. parkeri SAR was successfully maintained in A. ovale ticks by transstadial and transovarial passages; however, because this agent induced lower reproduction rates in A. ovale, the participation of a vertebrate amplifier host, yet to be determined, was speculated. Since the rice rat Euryoryzomys russatus was demonstrated to be the most important host for immature stages of A...
April 20, 2018: Ticks and Tick-borne Diseases
Anna Papa, Hana Zelená, Elpida Papadopoulou, Jakub Mrázek
Following the identification of severe fever with thrombocytopenia syndrome and Heartland viruses, the interest on tick-borne phleboviruses has increased rapidly. Uukuniemi virus has been proposed as a model for tick-borne phleboviruses. However, the number of available sequences is limited. In the current study we performed whole-genome sequencing on two Uukuniemi viral strains isolated in 2000 and 2004 from Ixodes ricinus ticks in the Czech Republic. Both strains cluster together with Potepli63 strain isolated in the country in 1963...
April 20, 2018: Ticks and Tick-borne Diseases
Adrian P Ybañez, Rochelle Haidee D Ybañez, Maxfrancis G Talle, Rinna Marie T Arreglo, Mary Janniel C Geens, Jun Gelacio I Villas, Stephanie R Villar, Charmen L Laruga, Shinuo Cao, Franck Paul Adjou Moumouni, Mingming Liu, Ikuo Igarashi, Xuenan Xuan
Theileria equi and Babesia caballi are tick-borne protozoan parasites that can cause anemia in horses. In the Philippines, serological detection of these parasites has only been reported in the Northern area (Luzon). In this study, 105 horses from Cebu and Bohol, Philippines were tested using peripheral blood smear examination (PBSE), immunochromatographic test (ICT) strips, and PCR. Clinical history, presenting clinical signs and complete blood count were obtained. Results revealed that although all horses were negative using PBSE, 23 (21...
April 18, 2018: Ticks and Tick-borne Diseases
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