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Ticks and Tick-borne Diseases

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https://www.readbyqxmd.com/read/28802807/acute-phase-response-in-babesia-canis-and-dirofilaria-immitis-co-infections-in-dogs
#1
Zorana Milanović, Anja Ilić, Jelena Francuski Andrić, Vladimir Radonjić, Anđelo Beletić, Milica Kovačević Filipović
Babesia canis and Dirofilaria immitis are emerging and geographically overlapping vector-borne pathogens in dogs. Infection with B. canis leads to acute-phase response (APR) that can be mild to severe and results in either non-complicated or complicated forms of the disease. The aim of this study was to determine whether acute B. canis infection is more severe in dogs with underlying asymptomatic D. immitis infection. Dogs of both sexes, different ages and breeds, with naturally occurring mono-infections with B...
August 2, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28784308/properties-of-the-tick-borne-encephalitis-virus-population-during-persistent-infection-of-ixodid-ticks-and-tick-cell-lines
#2
Oxana A Belova, Alexander G Litov, Ivan S Kholodilov, Liubov I Kozlovskaya, Lesley Bell-Sakyi, Lidiya Iu Romanova, Galina G Karganova
Tick-borne encephalitis virus (TBEV) is the causative agent of tick-borne encephalitis (TBE), a vector-borne zoonotic neuroinfection. For successful circulation in natural foci the virus has to survive in the vector for a long period of time. Information about the effect of long-term infection of ticks on properties of the viral population is of great importance. In recent years, changes in the eco-epidemiology of TBEV due to changes in distribution of ixodid ticks have been observed. These changes in TBEV-endemic areas could result in a shift of the main tick vector species, which in turn may lead to changes in properties of the virus...
July 25, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28774495/wild-and-domestic-animals-likely-involved-in-rickettsial-endemic-zones-of-northwestern-colombia
#3
Andrés F Londoño, Leidy Y Acevedo-Gutiérrez, Diana Marín, Verónica Contreras, Francisco J Díaz, Gustavo Valbuena, Marcelo B Labruna, Marylin Hidalgo, Margarita Arboleda, Salim Mattar, Sergio Solari, Juan D Rodas
Between 2006 and 2008, three outbreaks of human rickettsiosis occurred in Northwestern Colombia (municipalities of Necoclí, Los Córdobas and Turbo), with case fatality rates between 27% and 54%. The aim of this study was to determine previous exposure of wild and domestic animals to spotted fever group (SFG) rickettsiae through serological tests, to detect rickettsial evidence in their ectoparasites, and to analyze their possible role in the epidemiology of rickettsial diseases in this zone of the country...
July 21, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28736193/relapsing-fever-causative-agent-in-southern-iran-is-a-closely-related-species-to-east-african-borreliae
#4
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/28768603/tick-surveillance-for-borrelia-miyamotoi-and-phylogenetic-analysis-of-isolates-in-mongolia-and-japan
#5
Yukie Iwabu-Itoh, Boldbaatar Bazartseren, Oyunnomin Naranbaatar, Enkhmandakh Yondonjamts, Kiwa Furuno, Kyunglee Lee, Kozue Sato, Hiroki Kawabata, Nobuhiro Takada, Masako Andoh, Hiroko Kajita, Yosaburo Oikawa, Minoru Nakao, Makoto Ohnishi, Masahisa Watarai, Hiroshi Shimoda, Ken Maeda, Ai Takano
Borrelia miyamotoi, recently recognized as a human pathogenic spirochete, was isolated from Ixodes persulcatus and I. ovatus in northern Mongolia and Honshu Island, a major island in Japan. Although no human B. miyamotoi infections have been reported in Mongolia, the prevalence of B. miyamotoi in ticks from Mongolia is higher than that in ticks from Hokkaido, Japan, where human cases have been reported. Moreover, the multi-locus sequence analysis of cultured isolates revealed that B. miyamotoi isolates in Mongolia belong to the Siberian type, a sequence type that was originally reported from isolates from I...
July 14, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28728938/didelphis-albiventris-naturally-infected-with-hepatozoon-canis-in-southeastern-brazil
#6
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/28739301/a-new-pcr-assay-for-the-detection-and-differentiation-of-babesia-canis-and-babesia-vogeli
#7
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/28778675/knowledge-attitudes-and-practices-regarding-ticks-and-tick-borne-diseases-finland
#8
Viktor Zöldi, Topi Turunen, Outi Lyytikäinen, Jussi Sane
Tick-borne encephalitis (TBE) and Lyme borreliosis (LB) are endemic in Finland, with tens and thousands of cases, respectively, reported annually. We performed a field survey to investigate people's knowledge, attitudes and practices (KAP) regarding ticks, tick-borne diseases, and prevention strategies. The KAP were assessed using a pre-validated anonymous questionnaire consisting of 39 questions and statements. On two consecutive days in July 2016, convenience sampling was used in the cities of Parainen and Kotka, located in high-risk areas of tick-borne diseases, particularly of TBE...
July 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28705581/the-influence-of-preprandial-insemination-on-feeding-and-oviposition-of-ixodes-persulcatus-females-acari-ixodidae-and-some-thoughts-concerning-mating-strategies-in-ticks-of-the-genus-ixodes
#9
Inna Ioffe-Uspensky, Igor Uspensky
Prostriate ticks (subfamily Ixodinae, genus Ixodes) can copulate and the females can be inseminated before attachment to the host. In tests with Ixodes persulcatus females collected in the field and fed without males on the host, it was shown that this preprandial insemination is necessary and sufficient for successful engorgement and oviposition if female feeding took place in up to 1 month after collection. A 2-month period between preprandial insemination and female feeding was followed by a significant decrease in the proportion of normally engorged females and significant increase in egg mortality...
July 6, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28712556/serosurvey-for-crimean-congo-hemorrhagic-fever-virus-infections-in-ruminants-in-katanga-province-democratic-republic-of-the-congo
#10
Miriam A Sas, Marc Mertens, Jean G Kadiat, Isolde Schuster, Célestin P S Pongombo, Alois G K Maloba, Martin H Groschup
Crimean-Congo hemorrhagic fever virus (CCHFV) has been detected in many African countries. Unfortunately, little is known about the current CCHFV situation in most of those countries including the Democratic Republic of the Congo (DRC). In over 50 years, three human CCHF cases have been detected in DRC but no seroepidemiological investigation was performed so far. To determine the prevalence of CCHFV-specific antibodies we tested 838 serum samples of cattle, goat and sheep from the southern province Katanga, DRC...
July 3, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28754599/bioassays-to-evaluate-non-contact-spatial-repellency-contact-irritancy-and-acute-toxicity-of-permethrin-treated-clothing-against-nymphal-ixodes-scapularis-ticks
#11
Lars Eisen, Dominic Rose, Robert Prose, Nicole E Breuner, Marc C Dolan, Karen Thompson, Neeta Connally
Summer-weight clothing articles impregnated with permethrin are available as a personal protective measure against human-biting ticks in the United States. However, very few studies have addressed the impact of contact with summer-weight permethrin-treated textiles on tick vigor and behavior. Our aim was to generate new knowledge of how permethrin-treated textiles impact nymphal Ixodes scapularis ticks, the primary vectors in the eastern United States of the causative agents of Lyme disease, human anaplasmosis, and human babesiosis...
July 1, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28709615/transcriptional-profiling-of-rickettsia-prowazekii-coding-and-non-coding-transcripts-during-in-vitro-host-pathogen-and-vector-pathogen-interactions
#12
Casey L C Schroeder, Hema P Narra, Abha Sahni, Kamil Khanipov, Jignesh Patel, Yuriy Fofanov, Sanjeev K Sahni
Natural pathogen transmission of Rickettsia prowazekii, the etiologic agent of epidemic typhus, to humans is associated with arthropods, including human body lice, ticks, and ectoparasites of eastern flying squirrel. Recently, we have documented the presence of small RNAs in Rickettsia species and expression of R. prowazekii sRNAs during infection of cultured human microvascular endothelial cells (HMECs), which represent the primary target cells during human infections. Bacterial noncoding transcripts are now well established as critical post-transcriptional regulators of virulence and adaptation mechanisms in varying host environments...
June 29, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28684041/five-cases-of-vector-borne-francisella-tularensis-holarctica-infections-in-south-western-germany-and-genetic-diversity
#13
Johannes P Borde, Sabine Zange, Markus H Antwerpen, Enrico Georgi, Heiner von Buttlar, Winfried V Kern, Siegbert Rieg
Tularemia is a rare zoonotic disease in Germany. Francisella tularensis has been isolated previously from ticks in southern Germany underscoring the importance of ticks (Ixodes ricinus) in tularemia transmission, but there have been only few reports from this region with single cases or small case series of tick-borne transmissions of tularemia. We report five cases of non-game animal associated tularemia diagnosed from 2010 to 2016 in southwestern Germany - Baden-Wuerttemberg. Our case series and molecular typing (MLVA) results add published clinical experience to this underdiagnosed disease and consolidate previous findings regarding tick-borne transmission of tularemia and phylogenetic diversity in Germany...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28651947/molecular-identification-and-characterization-of-piroplasm-species-in-hokkaido-sika-deer-cervus-nippon-yesoensis-japan
#14
Elzahara Elbaz, Mohamed Abdallah Mohamed Moustafa, Kyunglee Lee, Wessam Mohamed Ahmed Mohamed, Ryo Nakao, Michito Shimozuru, Mariko Sashika, Emad Elsayed Ahmed Younis, Sabry Ahmed El-Khodery, Toshio Tsubota
Babesia and Theileria species are tick-borne protozoan parasites that have a veterinary and zoonotic importance. In order to investigate the prevalence and genetic diversity of these parasites, a total of 269 sika deer blood DNA samples collected from Hokkaido, Japan, were examined for Babesia and Theileria species by touch-down PCR targeting the 18S rRNA gene. Reverse line blot (RLB) hybridization was then used to detect 12 piroplasm species. The results revealed that 95.5% (257/269), 94.1% (253/269), 14.1% (38/269), 87...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28648773/the-burden-of-tick-borne-diseases-in-the-altai-region-of-russia
#15
V G Dedkov, E G Simonova, O V Beshlebova, M V Safonova, O A Stukolova, E V Verigina, G V Savinov, I P Karaseva, E A Blinova, V M Granitov, I V Arsenjeva, G A Shipulin
This article presents the results of a comprehensive survey of the burden of tick-borne infectious diseases (TBIDs) in the Altai region of Russia. Official data for TBID incidence were analyzed and 201 samples from patients with suspected TBID were studied. Furthermore, questing ticks and ticks recovered from humans were examined to estimate prevalence of TBID-causative agents. The Altai region was determined to have a heightened risk for TBIDs in Russia. The most epidemiologically significant tick-borne illness in this area is spotted fever group rickettsiosis, while nationally in Russia, the leading TBID is Lyme borreliosis...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28648772/clinical-outbreak-of-babesiosis-caused-by-babesia-capreoli-in-captive-reindeer-rangifer-tarandus-tarandus-in-the-netherlands
#16
Jan H Bos, Fokko C Klip, Hein Sprong, Els M Broens, Marja J L Kik
From a herd of captive reindeer (Rangifer tarandus tarandus) consisting of two males and seven females with five calves, three calves were diagnosed on post mortem examination with a Babesia capreoli infection. The diagnosis was indicated by PCR and when the other reindeer were examined two adult females and a one-year-old male were Babesia-positive. Molecular characterization of the 18S rDNA of the parasite showed complete identity with known B. capreoli sequences. Ixodes ricinus has been demonstrated to be a competent vector for B...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28647128/seasonal-dynamics-of-adult-dermacentor-reticulatus-in-a-peri-urban-park-in-southern-europe
#17
Emanuela Olivieri, Alessia Libera Gazzonis, Sergio Aurelio Zanzani, Fabrizia Veronesi, Maria Teresa Manfredi
Studies on the human-biting pathogen vectors Dermacentor reticulatus and Ixodes ricinus have been scarce in southern Europe. The aims of the present study were to determine the abundance of these ticks in a peri-urban park in northern Italy, describe the seasonal activity of D. reticulatus and examine the correlation between tick occurrence and environmental factors. Ticks were collected monthly from April 2015 to May 2016 using both dragging and flagging techniques. Various climatic variables (mean temperature, relative humidity and evapotranspiration for the collection dates; and 30-day moving averages preceding each collection date were calculated for rainfall, temperature, relative humidity and saturation deficit) also were recorded...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28647127/infrared-light-detection-by-the-haller-s-organ-of-adult-american-dog-ticks-dermacentor-variabilis-ixodida-ixodidae
#18
Robert D Mitchell, Jiwei Zhu, Ann L Carr, Anirudh Dhammi, Grayson Cave, Daniel E Sonenshine, R Michael Roe
The Haller's organ (HO), unique to ticks and mites, is found only on the first tarsus of the front pair of legs. The organ has an unusual morphology consisting of an anterior pit (AP) with protruding sensilla and a posterior capsule (Cp). The current thinking is that the HO's main function is chemosensation analogous to the insect antennae, but the functionality of its atypical structure (exclusive to the Acari) is unexplained. We provide the first evidence that the HO allows the American dog tick, Dermacentor variabilis, to respond to infrared (IR) light...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28645519/the-repellent-efficacy-of-eleven-essential-oils-against-adult-dermacentor-reticulatus-ticks
#19
Katarína Štefanidesová, Ľudovít Škultéty, Olivier A E Sparagano, Eva Špitalská
Dermacentor reticulatus ticks are among the most important arthropod vectors of zoonotic disease agents in Europe. Eleven essential oils, namely basil (Ocimum basilicum), bergamot (Citrus bergamia), clove bud (Syzygium aromaticum), citronella (Cymbopogon winterianus), creeping thyme (Thymus serpyllum), lavender (Lavandula angustifolia), lemon-scented gum (Corymbia citriodora), marjoram (Origanum majorana), peppermint (Mentha piperita), spearmint (M. spicata), and red thyme (Thymus vulgaris) were tested for repellency against adult D...
August 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28641955/molecular-identification-of-novel-phlebovirus-sequences-in-european-ticks
#20
Maren Prinz, Jonas Fuchs, Steffen Ehrmann, Michael Scherer-Lorenzen, Georg Kochs, Marcus Panning
In recent years the number of newly described tick-borne phleboviruses has been steadily growing. Some of these novel viruses are highly pathogenic in humans, e.g. the Heartland and severe fever with thrombocytopenia syndrome virus. We aimed to analyse ticks sampled across Europe to investigate the diversity of phleboviruses using a comprehensive PCR-based screening approach. A total of 4387 ticks were collected from the vegetation in regions of France, Belgium, Germany, Sweden, and Estonia, respectively. Ticks were pooled and 22/979 pools tested positive using a PCR targeting the large (L) segment of phleboviruses...
August 2017: Ticks and Tick-borne Diseases
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