Spotted Fever Rickettsioses in Sweden: Aspects of Epidemiology, Clinical Manifestations and Co-infections

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Lindblom, Anders,1957-Uppsala universitet,Klinisk mikrobiologi och infektionsmedicin,Kenneth Nilsson (author)

Spotted Fever Rickettsioses in Sweden : Aspects of Epidemiology, Clinical Manifestations and Co-infections

BookEnglish2016

Publisher, publication year, extent ...

Uppsala :Acta Universitatis Upsaliensis,2016
64 s.
electronicrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:uu-302137
ISBN:9789155496777
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302137URI

Supplementary language notes

Language:English
Summary in:English

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SwePubSwePub

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Subject category:vet swepub-contenttype
Subject category:dok swepub-publicationtype

Series

Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine,1651-6206 ;1253

Notes

The spotted fever group rickettsiae are emerging diseases. They cause damage in their hosts by invading the endothelium in small to medium-sized blood vessels, which results in vasculitis that can cause clinical manifestations from most organs.The present thesis describes the prevalence of Rickettsia helvetica in ticks, the incidence of rickettsial infection based on seroreactivity and seroconversion in humans and their symptoms, from different parts of Sweden and the Åland Islands in Finland. This was accomplished through serological analysis of both retrospective and prospective serum samples from confirmed and suspected tick-bitten individuals compared to individuals with no knowledge of tick exposure (blood donors). We found a comparable seroprevalence to Rickettsia spp. in different geographical areas where ticks are present; it was also comparable to the seroprevalence of Borrelia spp. Seroprevalence was also more common, as suspected, in the tick-exposed group compared to blood donors. In comparison with co-infections with other tick-borne infections (Anaplasma spp. and Borrelia spp.), we could conclude that co-infections do exist and that, based on clinical findings, it is difficult to distinguish which microorganism causes certain clinical manifestations. For reliable conclusions regarding the causative microorganism, the diagnosis should basically rely on diagnostic tests. In comparison with Borrelia spp., seroconversion to Rickettisa spp. was more common in the areas we investigated, indicating that rickettsiosis is a common tick-borne infection in Sweden and most likely underdiagnosed.When investigating patients with meningitis, we found R. felis in cerebrospinal fluid from two patients with subacute meningitis. This was the first report in which R. felis was found and diagnosed in patients in Sweden. The patients recovered without sequelae and without causal treatment. To provide guidelines on when to treat Rickettisa spp. infections, more investigations are needed.The present thesis shows that Rickettsia spp. are common in ticks and do infect humans. Rickettsial infection should be considered in both non-specific or specific symptoms after a tick bite. It was also shown in the thesis that flea-borne rickettsiosis (R. felis) occurs in Sweden and may cause invasive infections

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Infektionsmedicin hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Infectious Medicine hsv//eng
Rickettsia helvetica
Rickettsia felis
co-infection
erythema migrans
meningitis
serology
PCR
western blot
Infektionssjukdomar
Infectious Diseases

Added entries (persons, corporate bodies, meetings, titles ...)

Nilsson, Kenneth,DocentUppsala universitet,Klinisk mikrobiologi och infektionsmedicin (thesis advisor)
Olsen, Björn,ProfessorUppsala universitet,Klinisk mikrobiologi och infektionsmedicin (thesis advisor)
Herrmann, Björn,DocentUppsala universitet,Klinisk mikrobiologi och infektionsmedicin (thesis advisor)
Ahlm, Clas,ProfessorInstitutionen för klinisk mikrobiologi, Umeå universitet (opponent)
Uppsala universitetKlinisk mikrobiologi och infektionsmedicin (creator_code:org_t)

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