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Candidatus Neoehrlichia mikurensis and Borrelia burgdorferi sensu lato detected in the blood of Norwegian patients with erythema migrans

Publication date: Available online 13 May 2017 Source:Ticks and Tick-borne Diseases Author(s): H. Quarsten, A. Grankvist, L. Høyvoll, I.B. Myre, T. Skarpaas, V. Kjelland, C. Wenneras, S. Noraas The most common tick-borne human disease in Norway is Lyme borreliosis. Ticks in Norway also harbour less known disease-causing agents such as Candidatus Neoehrlichia mikurensis, Borrelia miyamotoi and Rickettsia helvetica. However, human infections caused by these pathogens have never been described in Norway. The main aims of the study were to evaluate the contribution of several tick-borne bacterial agents, other than Borrelia burgdorferi sensu lato, to zoonotic diseases in Norway and to determine their clinical pictures. Blood samples from 70 symptomatic tick-bitten adults from the Agder counties in southern Norway were screened for seven tick-borne pathogens by using a commercial multiplex PCR-based method and by singleplex real-time PCR protocols. Most patients (65/70) presented with a rash clinically diagnosed as erythema migrans (EM). The most frequently detected pathogen DNA was from Ca. N. mikurensis and was found in the blood of 10% (7/70) of the patients. The Ca. N. mikurensis-infected patients presented with an EM-like rash as the only symptom. B. burgdorferi s.l. DNA was present in the blood of 4% (3/70) of the study participants. None had detectable Anaplasma phagocytophilum, B. miyamotoi, Rickettsia typhus group or spotted fever group, Francisella tularensis, Co...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research

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In this study, we evaluated two mouse models - the C3H/N and Balb/c strains for susceptibility to infection and ability to transmit the pathogens via tick vector and to reveal the potential interactions between various bacterial tick-borne agents. Our results indicated that the C3H/N and Balb/c mice are well-accepted models of B. afzelii infection. However, they are not suitable for interaction studies with R. helvetica since the animals did not acquire rickettsiemia and do not transmit Rickettsia sp. to feeding ticks. PMID: 28854805 [PubMed - in process]
Source: Acta Virologica - Category: Infectious Diseases Authors: Tags: Acta Virol Source Type: research
Conclusions: The results of detection and attribution studies can inform evidence-based risk management to reduce current, and plan for future, changes in health risks associated with climate change. Gaining a better understanding of the size, timing, and distribution of the climate change burden of disease and injury requires reliable long-term data sets, more knowledge about the factors that confound and modify the effects of climate on health, and refinement of analytic techniques for detection and attribution. At the same time, significant advances are possible in the absence of complete data and statistical certainty:...
Source: EHP Research - Category: Environmental Health Authors: Tags: Commentary Source Type: research
Conclusion: Our results highlight the potential for climate change to have an effect on future Lyme disease risk in Canada even if the Paris Agreement’s goal to keep global warming below 2°C is achieved, although mitigation reducing emissions from RCP8.5 levels to those of RCP6.0 or less would be expected to slow tick invasion after the 2030s. https://doi.org/10.1289/EHP57 Received: 02 March 2016 Revised: 26 August 2016 Accepted: 30 August 2016 Published: 31 May 2017 Address correspondence to H. Beltrami, Earth Science Department, Physical Sciences Center, PO Box 5000, 1 West St, Antigonish, NS B2G 1W5. Tel...
Source: EHP Research - Category: Environmental Health Authors: Tags: Research Source Type: research
CONCLUSIONS: The obtained results show that the pheasants had developed antibodies to the investigated tick-borne agents. For this reason, they seem to be involved in the epidemiology of the studied tick-borne bacteria. PMID: 28378988 [PubMed - in process]
Source: Annals of Agricultural and Environmental Medicine : AAEM - Category: Environmental Health Authors: Tags: Ann Agric Environ Med Source Type: research
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Source: Healthy Living - The Huffington Post - Category: Consumer Health News Source Type: news
Amblyomma americanum (L.), the lone star tick, is an aggressive tick that is expanding its geographic range within the United States. This tick is the vector for the human and veterinary pathogens Ehrlichia chaffeensis and Ehrlichia ewingii and is associated with other microbes of unspecified pathogenicity including Rickettsia amblyommii, Panola Mountain Ehrlichia, and Borrelia lonestari. In Florida, there has been sparse contemporary data on the prevalence of these organisms in host-seeking lone star ticks. To determine the prevalence of this tick and associated microbes in North Central Florida state parks, ~1,500 lone s...
Source: Journal of Medical Entomology - Category: Biology Authors: Tags: Vector-Borne Diseases, Surveillance, Prevention Source Type: research
This study focused on the molecular identification of tick-borne pathogens in blood samples of 153 autochthonous asymptomatic dogs in Maio Island, Cape Verde archipelago. Eighty-four (54.9%) dogs were positive for one or more pathogens. Fifty-five (35.9%) dogs were infected with Hepatozoon canis, 53 (34.6%) with Anaplasma platys, five (3.3%) with Ehrlichia canis and Rickettsia monacensis, an emerging human pathogen, was also identified in a single dog (0.7%). The former three pathogens cause important canine tick-borne diseases that are transmitted or potentially transmitted by Rhipicephalus sanguineus s.l., the only hard ...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Conclusions Feral pigeons living in urban and periurban areas are a hazard for the human health as source of several pathogens. The obtained results confirm pigeons as reservoirs of chlamydial agents and suggest that they may be involved in the epidemiology of zoonotic tick-borne infections too.
Source: Asian Pacific Journal of Tropical Medicine - Category: Tropical Medicine Source Type: research
This study reports the occurrence of emerging zoonotic bacteria in ticks from Bosnia and Herzegovina for the first time, indicating a public health threat to humans. Therefore, physicians and practitioners should be aware of the presence of these tick‐borne bacteria, especially when they are faced with acute febrile illnesses after tick exposure.
Source: Transboundary and Emerging Diseases - Category: Veterinary Research Authors: Tags: Short Communication Source Type: research
Conclusion: This first report of A. phagocytophilum and B. burgdorferi s.l. in red foxes from Romania suggests a limited role of foxes in the maintenance of the two related pathogens, but may represent a potential risk from a public health perspective.
Source: Parasites and Vectors - Category: Microbiology Authors: Source Type: research
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