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Tick-Borne Relapsing Fever

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1. Isolation and molecular characterization of tick-borne relapsing fever Borrelia infecting Ornithodoros (Pavlovskyella) verrucosus ticks collected in Ukraine. Full Text available with Trip Pro

Isolation and molecular characterization of tick-borne relapsing fever Borrelia infecting Ornithodoros (Pavlovskyella) verrucosus ticks collected in Ukraine. Tick-borne relapsing fever (TBRF) is a neglected zoonotic bacterial disease known to occur on five continents. We report a laboratory acquired case of TBRF caused by Borrelia caucasica, which is endemic in Ukraine and transmitted by Ornithodoros verrucosus ticks. We isolated spirochetes and characterized them by partially sequencing (...) the neglected status of TBRF in this part of the world. Public health practitioners should consider TBRF and include the disease into differential diagnosis of febrile illnesses with unknown etiology.© The Author(s) 2019. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.

2019 Journal of Infectious Diseases

2. Tick-Borne Relapsing Fever in the White Mountains, Arizona, USA, 2013-2018. Full Text available with Trip Pro

Tick-Borne Relapsing Fever in the White Mountains, Arizona, USA, 2013-2018. Tick-borne relapsing fever (TBRF) is a bacterial infection transmitted by tick bites that occurs in several different parts of the world, including the western United States. We describe 6 cases of TBRF acquired in the White Mountains of Arizona, USA, and diagnosed during 2013-2018. All but 1 case-patient had recurrent fever, and some had marked laboratory abnormalities, including leukopenia, thrombocytopenia

2019 Emerging Infectious Diseases

3. Serological detection of Tick-Borne Relapsing Fever in Texan domestic dogs. Full Text available with Trip Pro

Serological detection of Tick-Borne Relapsing Fever in Texan domestic dogs. Tick-Borne Relapsing Fever (TBRF) is caused by spirochetes in the genus Borrelia. Very limited information exists on the incidence of this disease in humans and domestic dogs in the United States. The main objective of this study is to evaluate exposure of dogs to Borrelia turicatae, a causative agent of TBRF, in Texas. To this end, 878 canine serum samples were submitted to Texas A&M Veterinary Medical Diagnostic (...) Laboratory from October 2011 to September 2012 for suspected tick-borne illnesses. The recombinant Borrelial antigen glycerophosphodiester phosphodiesterase (GlpQ) was expressed, purified, and used as a diagnostic antigen in both ELISA assays and Immunoblot analysis. Unfortunately, due to significant background reaction, the use of GlpQ as a diagnostic marker in the ELISA assay was not effective in discriminating dogs exposed to B. turicatae. Nevertheless, immunoblot assays showed that 17 out of 853

2017 PLoS ONE

4. Relapsing Fevers: Neglected Tick-Borne Diseases Full Text available with Trip Pro

Relapsing Fevers: Neglected Tick-Borne Diseases Relapsing fever still remains a neglected disease and little is known on its reservoir, tick vector and physiopathology in the vertebrate host. The disease occurs in temperate as well as tropical countries. Relapsing fever borreliae are spirochaetes, members of the Borreliaceae family which also contain Lyme disease spirochaetes. They are mainly transmitted by Ornithodoros soft ticks, but some species are vectored by ixodid ticks. Traditionally (...) a Borrelia species is associated with a specific vector in a particular geographical area. However, new species are regularly described, and taxonomical uncertainties deserve further investigations to better understand Borrelia vector/host adaptation. The medical importance of Borrelia miyamotoi, transmitted by Ixodes spp., has recently spawned new interest in this bacterial group. In this review, recent data on tick-host-pathogen interactions for tick-borne relapsing fevers is presented, with special

2018 Frontiers in cellular and infection microbiology

5. Seroprevalence for the tick-borne relapsing fever spirochete Borrelia turicatae among small and medium sized mammals of Texas Full Text available with Trip Pro

Seroprevalence for the tick-borne relapsing fever spirochete Borrelia turicatae among small and medium sized mammals of Texas In low elevation arid regions throughout the southern United States, Borrelia turicatae is the principal agent of tick-borne relapsing fever. However, endemic foci and the vertebrate hosts involved in the ecology of B. turicatae remain undefined. Experimental infection studies suggest that small and medium sized mammals likely maintain B. turicatae in nature, while

2018 PLoS neglected tropical diseases

6. Ecological niche modeling and distribution of Ornithodoros hermsi associated with tick-borne relapsing fever in western North America Full Text available with Trip Pro

Ecological niche modeling and distribution of Ornithodoros hermsi associated with tick-borne relapsing fever in western North America 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

2017 PLoS neglected tropical diseases

7. Development and optimization of an in vitro cultivation protocol allows for isolation of Borrelia miyamotoi from patients with hard tick-borne relapsing fever. Full Text available with Trip Pro

Development and optimization of an in vitro cultivation protocol allows for isolation of Borrelia miyamotoi from patients with hard tick-borne relapsing fever. Borrelia miyamotoi has been shown to infect humans in Eurasia and North America causing hard tick-borne relapsing fever (HTBRF). In vitro cultivation of B. miyamotoi was described recently; but clinical isolation of relapsing fever Borrelia is cumbersome. Our aim was to develop a straightforward protocol enabling B. miyamotoi isolation (...) plasma containing B. miyamotoi is hampered due to anticoagulants. Using a simple centrifugation protocol we were able to circumvent this detrimental effect, allowing for the first clinical isolation of B. miyamotoi. This will be of value for future research on the pathogenesis, genetics, diagnosis, therapy and epidemiology of HTBRF and other tick-borne relapsing fevers.Copyright © 2017 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.

2017 Clinical Microbiology and Infection

8. Plasmodium falciparum malaria co-infection with tick-borne relapsing fever in Dakar. Full Text available with Trip Pro

Plasmodium falciparum malaria co-infection with tick-borne relapsing fever in Dakar. West African tick-borne relapsing fever (TBRF) due to Borrelia crocidurae and malaria are co-endemics in Senegal. Although expected to be high, co-infections are rarely reported. A case of falciparum malaria and B. crocidurae co-infection in a patient from Velingara (South of Senegal) is discussed.A 28 year-old-male patient presented to Aristide Le Dantec Hospital for recurrent fever. He initially presented (...) to a local post health of Pikine (sub-urban of Dakar) and was diagnosed for malaria on the basis of positive malaria rapid diagnostic test (RDT) specific to Plamodium falciparum. The patient was treated as uncomplicated falciparum malaria. Four days after admission the patient was referred to Le Dantec Hospital. He presented with fever (39 °C), soreness, headache and vomiting. The blood pressure was 120/80 mmHg. The rest of the examination was normal. A thick film from peripheral blood was performed

2017 Malaria journal

9. Tick-Borne Relapsing Fever

Tick-Borne Relapsing Fever Tick-Borne Relapsing Fever Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Tick-Borne Relapsing Fever Tick (...) -Borne Relapsing Fever Aka: Tick-Borne Relapsing Fever , Relapsing Fever From Related Chapters II. Epidemiology Rare: <500 cases reported in U.S. in last 25 years Region U.S. West of the Mississippi River More common in mountains III. Pathophysiology Cause in genus Vectors Soft Ticks (Ornithodoros genus) Other species cause Relapsing Fever in Africa and Russia hermsii (reservoir: Squirrels and chipmunks) tunicate (reservoir: Cattle, rodents, pigs) miyamotoi (human to human transmission) recurrentis

2018 FP Notebook

10. Tick-Borne Relapsing Fever Outbreak Among a High School Football Team at an Outdoor Education Camping Trip, Arizona, 2014. Full Text available with Trip Pro

Tick-Borne Relapsing Fever Outbreak Among a High School Football Team at an Outdoor Education Camping Trip, Arizona, 2014. During August 2014, five high school students who had attended an outdoor education camp were hospitalized with a febrile illness, prompting further investigation. Ten total cases of tick-borne relapsing fever (TBRF) were identified-six cases confirmed by culture or visualization of spirochetes on blood smear and four probable cases with compatible symptoms (attack rate: 23

2016 American Journal of Tropical Medicine & Hygiene

11. An Alternative Strategy of Preventive Control of Tick-borne Relapsing Fever in Rural Areas of Sine-Saloum, Senegal. Full Text available with Trip Pro

An Alternative Strategy of Preventive Control of Tick-borne Relapsing Fever in Rural Areas of Sine-Saloum, Senegal. In Senegal, tick-borne relapsing fever (TBRF) is a major cause of morbidity and a neglected public health problem. Borreliosis cases commonly detected in two villages led us to implement a borreliosis preventive control including cementing of floors in bedrooms and outbuildings attended by inhabitants to avoid human contacts with tick vectors. Epidemiological and medical (...) monitoring of the TBRF incidence was carried out at Dielmo and Ndiop by testing the blood of febrile patients since 1990 and 1993, respectively. Intra-domiciliary habitat conditions were improved by cementing, coupled with accompanying measures, from March 2013 to September 2015. Application of this strategy was associated with a significant reduction of borreliosis incidence. This was more evident in Dielmo, dropping from 10.55 to 2.63 cases per 100 person-years (P < 0.001), than in Ndiop where

2016 American Journal of Tropical Medicine & Hygiene

12. Chromosome and Linear Plasmid Sequences of a 2015 Human Isolate of the Tick-Borne Relapsing Fever Spirochete, Borrelia turicatae Full Text available with Trip Pro

Chromosome and Linear Plasmid Sequences of a 2015 Human Isolate of the Tick-Borne Relapsing Fever Spirochete, Borrelia turicatae The sequences of the complete linear chromosome and 7 linear plasmids of the relapsing fever spirochete Borrelia turicatae are presented in this report. The 925,547 bp of chromosome and 380,211 bp of plasmid sequence were predicted to contain a total of 1,131 open reading frames, with an average G+C content of 29.7%. Copyright © 2016 Kingry et al.

2016 Genome Announcements

13. Tick-Borne Relapsing Fever, Southern Spain, 2004–2015 Full Text available with Trip Pro

Tick-Borne Relapsing Fever, Southern Spain, 2004–2015 27442975 2018 02 01 2018 11 13 1080-6059 22 12 2016 12 Emerging infectious diseases Emerging Infect. Dis. Tick-Borne Relapsing Fever, Southern Spain, 2004-2015. 2217-2219 10.3201/eid2212.160870 Castilla-Guerra Luis L Marín-Martín Jorge J Colmenero-Camacho Miguel Angel MA eng Historical Article Letter 2016 12 15 United States Emerg Infect Dis 9508155 1080-6040 IM Animals Arthropod Vectors microbiology History, 21st Century Humans Relapsing (...) Fever epidemiology history microbiology transmission Spain epidemiology Ticks microbiology Borrelia Ornithodoros Spain bacteria meningitis neurologic complications relapsing fever soft ticks tick-borne relapsing fever ticks vector-borne infections zoonosis 2016 7 22 6 0 2018 2 2 6 0 2016 7 22 6 0 ppublish 27442975 10.3201/eid2212.160870 PMC5189161 An Pediatr (Barc). 2015 Jan;82(1):e73-7 24333101 Neurol Clin. 2010 Feb;28(1):277-91 19932386 Infect Dis Clin North Am. 2008 Sep;22(3):449-68, viii

2016 Emerging Infectious Diseases

14. Regarding Tick-Borne Relapsing Fever in the Americas; Some Historical Aspects of a Forgotten Disease in Colombia Full Text available with Trip Pro

Regarding Tick-Borne Relapsing Fever in the Americas; Some Historical Aspects of a Forgotten Disease in Colombia 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.

2016 Veterinary Sciences

15. Host associations and genomic diversity of Borrelia hermsii in an endemic focus of tick-borne relapsing fever in western North America Full Text available with Trip Pro

Host associations and genomic diversity of Borrelia hermsii in an endemic focus of tick-borne relapsing fever in western North America An unrecognized focus of tick-borne relapsing fever caused by Borrelia hermsii was identified in 2002 when five people became infected on Wild Horse Island in Flathead Lake, Montana. The terrestrial small mammal community on the island is composed primarily of pine squirrels (Tamiasciurus hudsonicus) and deer mice (Peromyscus maniculatus), neither of which

2016 Parasites & vectors

16. Chromosome and Plasmids of the Tick-Borne Relapsing Fever Agent Borrelia hermsii Full Text available with Trip Pro

Chromosome and Plasmids of the Tick-Borne Relapsing Fever Agent Borrelia hermsii The zoonotic pathogen Borrelia hermsii bears its multiple paralogous genes for variable antigens on several linear plasmids. Application of combined long-read and short-read next-generation sequencing provided complete sequences for antigen-encoding plasmids as well as other linear and circular plasmids and the linear chromosome of the genome. Copyright © 2016 Barbour.

2016 Genome Announcements

17. Tick-Borne Relapsing Fever Spirochetes in the Americas Full Text available with Trip Pro

Tick-Borne Relapsing Fever Spirochetes in the Americas Relapsing fever spirochetes are tick- and louse-borne pathogens that primarily afflict those in impoverished countries. Historically the pathogens have had a significant impact on public health, yet currently they are often overlooked because of the nonspecific display of disease. In this review, we discuss aspects of relapsing fever (RF) spirochete pathogenesis including the: (1) clinical manifestation of disease; (2) ability to diagnose

2016 Veterinary Sciences

18. Tick-Borne Relapsing Fever in Southwest Colorado: A Case Report. (Abstract)

Tick-Borne Relapsing Fever in Southwest Colorado: A Case Report. Tick-borne relapsing fever (TBRF) is a zoonosis caused by spirochetes of the genus Borrelia. The zoonosis is endemic in higher-elevation coniferous forests of the western United States.We discuss the case of a 44-year-old male residing in the San Juan Mountains of Western Colorado who presented with fever, myalgia, vomiting, and "violent chills" to an emergency department. Laboratory studies were notable for bandemia

2016 Journal of Emergency Medicine

19. Laboratory Diagnosis of Tick-Borne African Relapsing Fevers: Latest Developments Full Text available with Trip Pro

Laboratory Diagnosis of Tick-Borne African Relapsing Fevers: Latest Developments In Africa, relapsing fevers caused by ectoparasite-borne Borrelia species are transmitted by ticks, with the exception of Borrelia recurrentis, which is a louse-borne spirochete. These tropical diseases are responsible for mild to deadly spirochetemia. Cultured Borrelia crocidurae, Borrelia duttonii, and Borrelia hispanica circulate alongside at least six species that have not yet been cultured in vectors. Direct (...) laboratory, we developed a multiplex real-time PCR assay for the specific detection of B. duttonii/recurrentis and B. crocidurae: multispacer sequence typing accurately identified cultured relapsing fever borreliae and revealed diversity among them. Other molecular typing techniques, such as multilocus sequence analysis of tick-borne relapsing fever borreliae, showed the potential risk of human infection in Africa. Recent efforts to culture and sequence relapsing fever borreliae have provided new

2015 Frontiers in public health

20. Blood transfusion transmission of the tick-borne relapsing fever spirochete Borrelia miyamotoi in mice. (Abstract)

Blood transfusion transmission of the tick-borne relapsing fever spirochete Borrelia miyamotoi in mice. Borrelia miyamotoi, a recently discovered relapsing fever spirochete, occurs in hard-bodied ticks wherever Lyme disease is endemic. Human infection is associated with relapsing fever and can cause meningoencephalitis in immunocompromised patients. A few cases of transfusion transmission of other relapsing fever spirochete species have been reported but none for B. miyamotoi. Our objective

2015 Transfusion

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