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https://www.readbyqxmd.com/read/29133662/a-tiny-tick-can-cause-a-big-health-problem
#1
Manuel John, M Raman, Keith Ryan
Ticks are tiny crawling bugs in the spider family that feed by sucking blood from animals. They are second only to mosquitoes as vectors of human disease, both infectious and toxic. Infected ticks spread over a hundred diseases, some of which are fatal if undetected. They spread the spirochete (which multiplies in the insect's gut) with a subsequent bite to the next host. We describe the only reported cases of peri ocular tick bite from India that presented to us within a span of 3 days and its management. Due suspicion and magnification of the lesions revealed the ticks which otherwise masqueraded as small skin tags/moles on gross examination...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29132437/hap2-a-novel-gene-in-babesia-bigemina-is-expressed-in-tick-stages-and-specific-antibodies-block-zygote-formation
#2
Minerva Camacho-Nuez, Diego Josimar Hernández-Silva, Elizabeth Jacqueline Castañeda-Ortiz, María Elena Paredes-Martínez, Marisol Karina Rocha-Martínez, María Elizbeth Alvarez-Sánchez, Ricardo Francisco Mercado-Curiel, Gabriela Aguilar-Tipacamu, Juan Mosqueda
BACKGROUND: Bovine babesiosis is a tick-borne disease caused by the protozoan parasites of the genus Babesia. In their host vector, Babesia spp. undergo sexual reproduction. Therefore, the development of sexual stages and the subsequent formation of the zygote are essential for the parasite to invade the intestinal cells of the vector tick and continue its life-cycle. HAP2/GCS1 is a protein identified in plants, protozoan parasites and other organisms that has an important role during membrane fusion in fertilization processes...
November 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29127993/molecular-prevalence-risk-factors-assessment-and-haemato-biochemical-alterations-in-hepatozoonosis-in-dogs-from-punjab-india
#3
Kaushlendra Singh, Harkirat Singh, Nirbhay Kumar Singh, Neeraj Kashyap, Naresh Kumar Sood, Shitanshu Shekar Rath
Hepatozoonosis caused by Hepatozoon canis is an important tick-borne disease of dogs in tropical and sub-tropical regions throughout the world. In the present study evaluation of blood samples collected from 225 dogs presented at Small Animal Clinics, GADVASU, Ludhiana, Punjab (India) was done for the presence of H. canis by PCR based assay targeting a portion of 18S rRNA gene. Of the total samples subjected to PCR, an amplicon of 666bp was detected in 13.78% samples whereas, routine blood smear examination revealed gamonts in 5...
December 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/29127407/crystal-structure-of-borrelia-turicatae-protein-bta121-a-differentially-regulated-%C3%A2-gene-in-the-tick-mammalian-transmission-cycle-of-relapsing-fever-spirochetes
#4
Zhipu Luo, Alan J Kelleher, Rabih Darwiche, Elissa M Hudspeth, Oluwatosin K Shittu, Aparna Krishnavajhala, Roger Schneiter, Job E Lopez, Oluwatoyin A Asojo
Tick-borne relapsing fever (RF) borreliosis is a neglected disease that is often misdiagnosed. RF species circulating in the United States include Borrelia turicatae, which is transmitted by argasid ticks. Environmental adaptation by RF Borrelia is poorly understood, however our previous studies indicated differential regulation of B. turicatae genes localized on the 150 kb linear megaplasmid during the tick-mammalian transmission cycle, including bta121. This gene is up-regulated by B. turicatae in the tick versus the mammal, and the encoded protein (BTA121) is predicted to be surface localized...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29121976/prevalence-of-tick-borne-pathogens-in-questing-ixodes-ricinus-ticks-in-urban-and-suburban-areas-of-switzerland
#5
Corinne P Oechslin, Daniel Heutschi, Nicole Lenz, Werner Tischhauser, Olivier Péter, Olivier Rais, Christian M Beuret, Stephen L Leib, Sergei Bankoul, Rahel Ackermann-Gäumann
BACKGROUND: Throughout Europe, Ixodes ricinus transmits numerous pathogens. Its widespread distribution is not limited to rural but also includes urbanized areas. To date, comprehensive data on pathogen carrier rates of I. ricinus ticks in urban areas of Switzerland is lacking. RESULTS: Ixodes ricinus ticks sampled at 18 (sub-) urban collection sites throughout Switzerland showed carrier rates of 0% for tick-borne encephalitis virus, 18.0% for Borrelia burgdorferi (sensu lato), 2...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29119703/rickettsia-parkeri-in-free-ranging-wild-canids-from-brazilian-pampa
#6
B Dall'Agnol, U A Souza, B Weck, T C Trigo, M M A Jardim, F B Costa, M B Labruna, F B Peters, M O Favarini, F D Mazim, C A S Ferreira, J Reck
Spotted fevers are tick-borne diseases associated with various Rickettsia species. Rickettsia parkeri sensu stricto (s.s.) is the agent of an emerging eschar-associated rickettsiosis in humans from the USA and South American Pampa. Considering that R. parkeri s.s. is restricted to Americas and the potential role of dogs in the epidemiology of the disease, it is thus reasonable to hypothesize that wild canids could be involved in the enzootic cycle of this rickettsiosis. The aim of this work was to investigate the potential role of the wild canids from Pampa, Cerdocyon thous (crab-eating fox) and Lycalopex gymnocercus (Pampas fox), in the ecology of R...
November 8, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29119682/molecular-identification-of-tick-borne-pathogens-infecting-cattle-in-mymensingh-district-of-bangladesh-reveals-emerging-species-of-anaplasma-and-babesia
#7
B C Roy, J Krücken, J S Ahmed, S Majumder, M P Baumann, P-H Clausen, A M Nijhof
Tick-borne diseases are considered a major hindrance to the health and productive performance of cattle in Bangladesh. To elucidate the epidemiology of tick-borne pathogens (TBPs) in local cattle, a cross-sectional study was performed in the 12 subdistricts (Upazilas) of Mymensingh district in Bangladesh. Blood samples and ticks were collected from 384 clinically healthy cattle kept by 135 farmers from 96 randomly selected villages. DNA extracted from the blood samples was subsequently screened by polymerase chain reaction (PCR) and a Reverse Line Blot (RLB) hybridization assay using an in-house prepared chemiluminescence solution for the presence of Anaplasma, Ehrlichia, Rickettsia, Babesia and Theileria spp...
November 8, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29116038/borrelia-burgdorferi-glycosaminoglycan-binding-proteins-a-potential-target-for-new-therapeutics-against-lyme-disease
#8
Yi-Pin Lin, Lingyun Li, Fuming Zhang, Robert J Linhardt
The spirochete bacterium Borrelia burgdorferisensu lato is the causative agent of Lyme disease, the most common vector-borne disease in Europe and the United States. The spirochetes can be transmitted to humans via ticks, and then spread to different tissues, leading to arthritis, carditis and neuroborreliosis. Although antibiotics have commonly been used to treat infected individuals, some treated patients do not respond to antibiotics and experience persistent, long-term arthritis. Thus, there is a need to investigate alternative therapeutics against Lyme disease...
November 8, 2017: Microbiology
https://www.readbyqxmd.com/read/29107656/molecular-prevalence-of-spotted-fever-group-rickettsiae-in-ticks-from-qinghai-province-northwestern-china
#9
Rong Han, Jifei Yang, Qingli Niu, Zhijie Liu, Ze Chen, Wei Kan, Guangwei Hu, Guangyuan Liu, Jianxun Luo, Hong Yin
Tick-borne rickettsioses is one of the oldest known vector-borne diseases and has been viewed as emerging or re-emerging disease in China. The causative agents have been increasingly recognized and exhibited a high degree of genetic diversity and widespread distribution. This study was conducted to determine the prevalence of spotted fever group rickettsiae in ticks from Qinghai Province, northwestern China. In total, 860 questing adult ticks representing six species were collected. The SFG rickettsiae were detected in Haemaphysalis qinghaiensis (19...
October 28, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29104867/microbial-communities-in-north-american-ixodid-ticks-of-veterinary-and-medical-importance
#10
REVIEW
Andrea S Varela-Stokes, Si Hong Park, Sun Ae Kim, Steven C Ricke
Interest in microbial communities, or microbiota, of blood-feeding arthropods such as ticks (order Parasitiformes, suborder Ixodida) is increasing. Studies on tick microorganisms historically emphasized pathogens of high medical or veterinary importance. Current techniques allow for simultaneous detection of pathogens of interest, non-pathogenic symbionts, like Coxiella-LE and Francisella-LE, and microorganisms of unknown pathogenic potential. While each generation of ticks begins with a maternally acquired repertoire of microorganisms, microhabitats off and on vertebrate hosts can alter the microbiome during the life cycle...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29103263/hematological-changes-associated-with-theileria-orientalis-infection-in-korean-indigenous-cattle
#11
Suhee Kim, Do-Hyeon Yu, Sung-Woo Kang, Jeong-Byoung Chae, Kyoung-Seong Choi, Hyeon-Cheol Kim, Bae-Keun Park, Joon-Seok Chae, Jinho Park
Tick-borne pathogens can cause serious problems in grazing cattle. However, little information is available on tick-mediated diseases in cattle grazing on mountains. Thus, this study aimed to understand the potential problems related to tick-borne diseases in grazing cattle through the investigation of prevalent tick-transmitted infections, and their associated hematological changes, in terms of season and grazing type in Korean indigenous cattle (=Hanwoo). Hanwoo cattle from 3 regions of the Republic of Korea (=Korea) were either maintained indoors or placed on grassy mountains from spring to fall of 2014 and 2015...
October 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29096526/establishment-of-an-antiviral-assay-system-and-identification-of-severe-fever-with-thrombocytopenia-syndrome-virus-inhibitors
#12
Masanori Baba, Masaaki Toyama, Norikazu Sakakibara, Mika Okamoto, Naomichi Arima, Masayuki Saijo
Aims Severe fever with thrombocytopenia syndrome (SFTS) is an emerging tick-borne infectious disease. SFTS is epidemic in Asia, and its fatality rate is around 30% in Japan. The causative virus severe fever with thrombocytopenia syndrome virus (SFTSV) is a phlebovirus of the family Phenuiviridae (the order Bunyavirales). Although effective treatments are required, there are no antiviral agents currently approved for clinical use. Ribavirin and favipiravir were examined for their anti-SFTSV activity and found to be selective inhibitors of SFTSV replication in vitro...
November 3, 2017: Antiviral Chemistry & Chemotherapy
https://www.readbyqxmd.com/read/29089249/groel-typing-and-phylogeny-of-anaplasma-species-in-ticks-from-domestic-and-wild-vertebrates
#13
Valentina Chisu, Rosanna Zobba, Roberta Lecis, Francesca Sotgiu, Giovanna Masala, Cipriano Foxi, Danilo Pisu, Alberto Alberti
Anaplasma species are globally distributed tick-borne bacteria causing a range of clinical conditions in domestic animals, wildlife, and human. Nevertheless, data on presence and distribution of Anaplasma strains in ticks are still lacking, especially in the Mediterranean region. This study reports the molecular identification, genetic characterization and phylogeny of Anaplasma strains of both veterinary and zoonotic importance in ticks collected from domestic and wild hosts sampled in a typical Mediterranean warm temperate region, the island of Sardinia...
October 26, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29084219/ecological-niche-modeling-and-distribution-of-ornithodoros-hermsi-associated-with-tick-borne-relapsing-fever-in-western-north-america
#14
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/29079185/potential-exposure-of-humans-to-rickettsia-felis-in-greece
#15
Dimosthenis Chochlakis, Antonios Germanakis, Georgios Chaliotis, Stefania Kapetanaki, Loukia Kalogeraki, Elliona Gkika, Nikolaos Partalis, Georgia Polymili, Yannis Tselentis, Anna Psaroulaki
Rickettsia felis is a flea-transmitted pathogen however, in Greece, much work has been done on another flea-borne pathogen, R. typhi; human cases have been described and high-risk areas have been characterized. Nevertheless, little is known about human infections caused by R. felis in the country since human cases are not routinely tested for antibodies against this pathogen. During the past seven years, we have set up a protocol at the National Reference Centre in order to improve the testing of tick-borne diseases in Greece...
October 24, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29069610/new-genetic-lineage-within-the-siberian-subtype-of-tick-borne-encephalitis-virus-found-in-western-siberia-russia
#16
Sergey E Tkachev, Galina S Chicherina, Irina Golovljova, Polina S Belokopytova, Artem Yu Tikunov, Oksana V Zadora, Victor V Glupov, Nina V Tikunova
Tick-borne encephalitis virus (TBEV), a member of the Flaviviridae family, is a causative agent of a severe neurological disease. There are three main TBEV subtypes: the European (TBEV-Eu), Far Eastern (TBEV-FE), and Siberian (TBEV-Sib). Currently, three lineages within TBEV-Sib have been recorded. In this study, the genetic and biological characteristics of a new original strain, TBEV-2871, isolated in the Novosibirsk province of Western Siberia, Russia were investigated. The strain has low neuroinvasiveness in mice...
October 22, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29061482/irc2-bf-a-yeast-and-borrelia-responsive-component-of-the-complement-system-from-the-hard-tick-ixodes-ricinus
#17
Veronika Urbanová, Ondřej Hajdušek, Radek Šíma, Zdeněk Franta, Helena Hönig-Mondeková, Lenka Grunclová, Pavla Bartošová-Sojková, Marie Jalovecká, Petr Kopáček
Ticks possess components of a primordial complement system that presumably play a role in the interaction of the tick immune system with tick-borne pathogens and affect their transmission. Here we characterized a novel complement component, tagged as IrC2/Bf, from the hard tick Ixodes ricinus, the principal vector of Lyme disease in Europe. IrC2/Bf is a multi-domain molecule composed of 5-7 CCP modules, varied by alternative splicing, followed by a von Willebrand factor A domain and a C-terminal trypsin-like domain...
October 20, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29056929/evaluation-on-infectivity-of-babesia-microti-to-domestic-animals-and-ticks-outside-the-ixodes-genus
#18
Jiajun Wu, Jie Cao, Yongzhi Zhou, Houshuang Zhang, Haiyan Gong, Jinlin Zhou
Babesiosis caused by Babesia microti parasite is an emerging tick borne zoonotic disease that was confirmed recently in China. To understand the epidemiology characteristics of this emerging disease, infectivity of B. microti to domestic animals and ticks outside the genus Ixodes was evaluated in this study. Different domestic animals, chick, pig, goat, dog and the reference host rat were experimentally inoculated with B. microti-infected erythrocytes and the parasite infection was monitored daily by blood smear observation, real-time PCR detection, nested-PCR and special antibody responses during 55 days period...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29056742/fluorescent-protein-expressing-rickettsia-buchneri-and-rickettsia-peacockii-for-tracking-symbiont-tick-cell-interactions
#19
Timothy J Kurtti, Nicole Y Burkhardt, Chan C Heu, Ulrike G Munderloh
Rickettsiae of indeterminate pathogenicity are widely associated with ticks. The presence of these endosymbionts can confound a One Health approach to combatting tick-borne diseases. Genomic analyses of symbiotic rickettsiae have revealed that they harbor mutations in gene coding for proteins involved in rickettsial pathogenicity and motility. We have isolated and characterized two rickettsial symbionts-Rickettsia peacockii and R. buchneri-both from ticks using tick cell cultures. To better track these enigmatic rickettsiae in ticks and at the tick-mammal interface we transformed the rickettsiae to express fluorescent proteins using shuttle vectors based on rickettsial plasmids or a transposition system driving insertional mutagenesis...
November 17, 2016: Veterinary Sciences
https://www.readbyqxmd.com/read/29056741/regarding-tick-borne-relapsing-fever-in-the-americas-some-historical-aspects-of-a-forgotten-disease-in-colombia
#20
Álvaro A Faccini-Martínez, Carlos A Botero-García
In the first decades of the 20th century, scientific papers were published suggesting the presence of Tick-Borne Relapsing Fever in Colombia. As a contribution, we present some historical aspects referring to this topic.
November 4, 2016: Veterinary Sciences
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