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Thus, TBEV PCR should be reserved for immunocompromised patients, who have difficulties activating an antibody response [37]. Most cases were also tested for Lyme neuroborreliosis due to a history of tick bite. In contrast to the Norwegian study, in which a few (5%) of the TBE patients also had a positive Bb intrathecal antibody index, none in our cohort did, suggesting that co-infection is not common in Denmark [9]. Nonetheless, LNB is a common infection of the nervous system in Denmark with an incidence of 2.6/100,000 individuals per year [38].The incidence of TBE increased in our study period, except for a decrease in 2020, which was likely due to COVID-19 travel restrictions resulting in fewer imported cases (Fig. 3). We also observed an increase in test rates, although less than the corresponding incidence rates, along with the positivity rates. The test rate increase in 2018–2019, without an accompanying equivalent incidence rate increase, could be due to the establishment of a new risk area in North Zealand in 2019 (Fig. 3) [4, 13]. Altogether, our data suggested that the increase in TBE cases in the study period was real rather than due to increased test activity.In Denmark, TBE vaccination is self-financed. Currently, national guidelines recommend TBE vaccination for people walking on trails in risk areas combined with regular tick bites, or who walk outside trails in forests and scrubs during the transmission season. In this cohort, only one patient was fully vaccinated and one patient partly, whereas an additional 14 individuals were eligible for vaccination according to guidelines (i.e., living or going on vacation, hunting, doing sports (geocaching, running) or working (woodcutter) in an endemic area) [39]. Our data suggest self-perceived risk of TBE infection may be underestimated by people at risk. Increased public awareness due to media attention on TBE in Denmark has led to a raised vaccine demand in the last few years.Strengths and limitationsThe nationwide design with complete long-term follow-up is an important strength of our study. The comparison to matched controls with HSV-1 encephalitis allowed us to contextualize the morbidity and mortality of TBE, while the matched
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TBE patients, although this difference was not seen when we only considered TBE cases with encephalitis. From 2015 to 2023, the incidence rate of TBE increased more than the test rate. This indicated a real increase in TBE cases, and was supported by an increasing positivity rate. ReferencesFactsheet about tick-borne encephalitis (TBE) [Internet] (2017) Available from: P, Strle F (2015) Tick-borne encephalitis: a review of epidemiology, clinical characteristics, and management. World J Clin Cases 3(5):430–441Article PubMed PubMed Central Google Scholar Beauté J, Spiteri G, Warns-Petit E, Zeller H (2018) Tick-borne encephalitis in Europe, 2012 to 2016. Euro Surveill 23(45):1800201Article PubMed PubMed Central Google Scholar The_TBE_Book_7th_Edition [Internet]. Available from: Serum Institut. TBE (Tick-borne Encephalitis) [Internet]. Available from: L, Vapalahti O (2008) Tick-borne encephalitis. Lancet 371(9627):1861–1871Article PubMed Google Scholar Nygren TM, Pilic A, Böhmer MM, Wagner-Wiening C, Wichmann O, Hellenbrand W (2023) Recovery and sequelae in 523 adults and children with tick-borne encephalitis in Germany. Infection 51(5):1503–1511Article PubMed PubMed Central Google Scholar Kaiser R (2008) Tick-borne encephalitis. Infect Dis Clin North Am 22(3):561–75Article PubMed Google Scholar Skudal H, Lorentzen ÅR, Stenstad T, Quist-Paulsen E, Egeland J, Fevang B et al (2024) Clinical characteristics and factors affecting disease severity in hospitalized tick-borne encephalitis patients in Norway from 2018 to 2022. Eur J Clin Microbiol Infect Dis. PubMed PubMed Central Google Scholar Riccardi N, Antonello RM, Luzzati R, Zajkowska J, Di Bella S, Giacobbe DR (2019) Tick-borne encephalitis in Europe: a brief update on epidemiology, diagnosis, prevention, and treatment. Eur J Intern Med 62:1–6Article PubMed Google Scholar Jore S, Viljugrein H, Hjertqvist M, Dub T, Mäkelä H (2023) Outdoor recreation, tick borne encephalitis incidence and seasonality in Finland, Norway and Sweden during the COVID-19 pandemic (2020/2021). Infect Ecol Epidemiol 13(1):2281055PubMed PubMed Central Google Scholar Tick-borne encephalitis Annual Epidemiological Report 2022Statens Serum Institut. TBE - opgørelse over sygdomsforekomst 2020–2023 [Internet]. Available from: mange bestillinger af vaccinationer mod TBE-virus fra flåter [Internet]. Available from: J, Larsen L, Brandt CT, Wiese L, Hansen BR, Andersen CØ et al (2021) Existing data sources for clinical epidemiology: The Danish Study Group of Infections of the Brain Database (DASGIB). ClinTBE File: How to open TBE file (and what it is)
Or bilateral lesion in the medial temporal lobe and inferolateral frontal lobe). The GOS score was unfavorable in 48/52 (92%) at discharge, 43/52 (83%) at 1-month, and 39/52 (75%) at 3-month follow-up (Fig. 2).A logistic regression model accounting for sex and age showed a higher likelihood of an unfavorable GOS score (GOS 1–4) among HSV-1 patients compared to the TBE patients. At discharge, 1-month, and 3-month follow-up, the odds ratio (OR) of an unfavorable GOS score in the HSV-1 cohort compared to TBE cohort were 4.1 (95% CI 1.2–14), 6.5 (95% CI 2.6–16.2), and 6.9 (95% CI 2.8–16.9), respectively. Sex and age were not significant.A subgroup analysis only considering TBE cases with encephalitis and their matched HSV-1 cases showed no significant difference in the OR of an unfavorable outcome in the two cohorts. At discharge, 1-month, and 3-month follow-up, the OR of an unfavorable GOS score in the HSV-1 cohort compared to TBE cohort were 2.1 (95% CI 0.2–24.4), 1.8 (95% CI 0.5–6.3), and 3.16 (95% CI 1.0–10.3), respectively.TBE incidence and diagnostics in Denmark from 2015 to 2023SSI reported 89 patients (hereof 4 children 3 and Supplementary Fig. 1).Fig. 3Incidence and test rates of tick-borne encephalitis in Denmark from 2015 to 2023. Data retrieved from Statens Serum Institut and Statistics Denmark. The black line represents the test rate (per 100,000 individuals), and the blue line represents the incidence rate, scaled to the same axis. The shaded region highlights the possible impact of COVID-19 travel restrictions during 2020, resulting in fewer imported cases. The arrow points to an increase in test rates in 2018–2019, possibly due to the establishment of a new risk area in North Zealand in 2019Full size imageThe test rate in the total Danish population increased from 5.5/100,000 in 2015 to 14.4/100,000 in 2023 (Fig. 3). The positivity rate increased from 0.6% in 2015 to 3.3% in 2023. The increased test activity was driven by the Capital Region of Denmark (covers Bornholm and North Zealand), and Region Zealand, as well as the Region of Southern Denmark, where locally acquired TBE cases have been diagnosed (Fig. 4). Test activity. XNXX.COM 'red tbe' Search, free sex videos serial 783A2-8A serial 783A2-8A G32A2-8B088-TBE R11A2-8B041-TBE I35A2-8B069-TBE H30A2-8B036-TBE F33A2-8B021-TBE L82A2-8B068-TBE Z30A2-8B038-TBETBE - What does TBE stand for? The Free Dictionary
At Statens Serum Institut (SSI). SSI is responsible for monitoring epidemic diseases and providing risk estimations. The increase in TBE cases and new geographical risk areas led to public concern and an unprecedented vaccine demand, and in June 2023, SSI reported having delivered a year’s normal consumption of vaccines within a few weeks [14].The aim of this study was to make a first-time description of the disease course in adult patients hospitalized with TBE in Denmark and determine the yearly incidence and test activity of TBE from 2015 to 2023. This description includes clinical characteristics, objective findings, diagnostic workup, and outcome in terms of sequelae. Outcome was compared to a matched cohort of patients hospitalized with herpes simplex virus type 1 (HSV-1) encephalitis to contextualize the course of TBE.Materials and methodsStudy designWe performed a nationwide prospective cohort study of all adults hospitalized with TBE at departments of infectious diseases in Denmark between 1st of January 2015 and 31st of December 2023.SettingIn December 2023, the total population of Denmark numbered 5.9 million people. In Denmark, healthcare is tax-financed and provided to all residents free of charge. A unique ten-digit personal identification number is assigned to all Danish residents at birth or upon immigration and can be used for linkage of all healthcare information at an individual level.Data sourcesThe Danish Study Group of Infections of the Brain (DASGIB) is a nationwide, population-based, prospective cohort study enrolling all patients ≥ 18 years with a CNS infection managed by departments of infectious diseases in Denmark since 2015 [15]. We used the DASGIB database to identify all adults hospitalized with TBE in the inclusion period. Additionally, a cohort of matched controls with HSV-1 encephalitis was identified. Subjects were matched 1:1 on sex and age ± 5 years. One HSV-1 patient was used as a control for two different TBE patients due to lacking matches.TBE diagnostics (polymerase chain reaction (PCR) and serology) are centralized at SSI. TBEV-IgM and –IgG antibodies in serum and/or cerebrospinal fluid (CSF) were measured using the Serion FSME/TBE Virus ELISA (Serion Diagnostics, Germany) following instructions of the manufacturer. TBEV-RNA in serum and/orFree tbe catcher Download - tbe catcher for Windows - UpdateStar
CSF was detected with real-time PCR.To calculate the yearly incidence of TBE from 2015 to 2023, numbers on all second phase TBE cases, including sex and age (including patients 13]. Numbers on the yearly Danish population including sex and age were retrieved from Statistics Denmark, the central authority on Danish statistics [16].To calculate the yearly test rate of TBE from 2015 to 2023, data on TBE tests were retrieved from The Danish Microbiology Database (MiBa) (including patients 17]. Every tested person only appeared once, regardless of the number of tests, per calendar year from 2015 to 2023.Study populationStudy participants fulfilled the DASGIB criteria for CNS infections [15]. Meningitis was defined as a clinical presentation consistent with viral meningitis (e.g., headache, neck stiffness, photophobia, hyperacusis, fever) without signs of encephalitis. Encephalitis was defined according to the International Encephalitis consortium [18]. Meningoencephalomyelitis/-radiculitis was defined as encephalitis with involvement of the spinal cord or spinal nerve roots. Pleocytosis was defined as ≥ 10 × 106 cells/L in the CSF [15].Patients with TBE were defined by either a) detection of TBEV-IgM and -IgG antibodies in serum, b) TBEV-IgM in CSF, c) seroconversion or four-fold increase of TBEV-specific antibodies in paired serum samples, or d) detection of TBEV RNA by PCR in blood or CSF [19, 20].Patients with HSV-1 encephalitis had a clinical presentation consistent with encephalitis and at least one of the following: a) detection of HSV-1 DNA in CSF by PCR or b) positive HSV-1 intrathecal antibody index test [21].VariablesTBE patientsWe obtained data on date and place of admission, basic demographics (age, sex, physical and functional status before admission), travel history, vaccination status for TBE and other flaviviruses (dengue, yellow-fever, and Japanese encephalitis virus), Charlson Comorbidity Index (CCI) score [22], immunodeficiency, history of tick bite, geographic location for tick bite, duration of symptoms, defined time from onset of symptoms to admission to hospital, clinical presentation, length of hospital stay, admission to the intensive care unit (ICU), and diagnostic work-up (biochemical and microbiological analyses of blood and CSF, and neuroimaging). Data on vaccination status were retrieved from the Danish Vaccination Register [23]. Immunodeficiency wasSchrodinger.Suites. .CRACKFiX.ISO-TBE - xREL
Design reduces the confounding effect of age and sex. Notably, a limitation of this comparison is that all the patients in the HSV-1 cohort had encephalitis, compared to 27/52 (52%) in the TBE cohort. Previous studies have shown that patients with encephalitis are more likely to have an unfavorable outcome than those with viral meningitis [40].An unequal comparison between a group of encephalitis and a mixed group of meningitis and encephalitis could bias the results towards an apparent higher morbidity of HSV-1. Therefore, we performed a subgroup analysis, considering only TBE cases with encephalitis and their matched HSV-1 cases. Here, the difference in risk of an unfavorable outcome between groups disappeared. Due to the small sample size, it is important to note that these results may be underpowered, with a risk of type II error. Although the cases were matched, the HSV-1 encephalitis patients had more cognitive/physical deficits, comorbidities, and a larger proportion were immunosuppressed prior to admission, which may also impact morbidity.A limitation of our study is that we were only able to include 52 of the 85 adult TBE cases reported by SSI during the study period. The missing 33 cases could consist of milder cases, managed in outpatient settings, or severe cases, admitted to other departments (e.g., departments of neurology), and were thus not included in the DASGIB database. Our cohort could underrepresent the mildest cases. To address this limitation, we propose a future prospective study enrolling all patients diagnosed with TBE by SSI. Another limitation is the missing GOS score in one patient at 1-month follow-up, and two patients at 3-month follow-up, which might decrease statistical power slightly. The variability in follow-up times, as well as missing follow-up times, made it difficult to summarize long-term residual symptoms for the whole cohort. Finally, it would be relevant in a future study to explore markers of cytokine/protein profiles to shed light on the drivers of CNS inflammation in TBE.ConclusionIn conclusion, the disease course of TBE in Denmark was comparable to the course in other European countries. HSV-1 encephalitis patients were more likely to have an unfavorable outcome thanSchrodinger.KNIME.Workflows. .ISO-TBE - NFO.nydus
Was most frequent among the 40- to the 70-year-olds, and men were tested more often than women (Supplementary Fig. 2).Fig. 4Tick-borne encephalitis test rate in the five different regions in Denmark from 2015 to 2023. Every tested person only appears once per calendar yearFull size imageDiscussionTBE is an emerging disease of public health importance associated with significant morbidity. This is the first nationwide study in Denmark to describe the clinical characteristics and outcome of adults with TBE, as well as the TBE incidence in relation to test activity.The clinical presentation, mortality, and outcome were in alignment with reports from other European countries. An unfavorable outcome was associated with pre-existing comorbidities and older age. TBE was associated with less mortality and morbidity compared to a matched cohort of HSV-1 encephalitis patients. Consistent with data from ECDC showing an increase in TBE incidence in EU/EEA countries after 2018, we observed an incidence rate ratio of 14 in 2023 with 2015 as ref. [12].The clinical characteristics of this TBE cohort were similar to formerly described TBEV-Eu cohorts in terms of basic characteristics, disease presentation, morbidity, and mortality [2, 3, 6, 9, 28,29,30]. Approximately half of the cases in our study had encephalitis. This is a lower percentage than the results from Norway in the study by Skudal et al. (105/153, 69%), but similar to the results from Sweden in the study by Bartholdsson et al. (381/703, 54%) [9, 30]. The patients with encephalitis in our cohort were significantly older than those with meningitis. Nearly three out of four patients had a biphasic course, in alignment with previous findings, with the most common first and second phase symptoms being headache and fever [2, 6]. In contrast, only half of the TBE cases in Norway reported a biphasic course (53%) [9].The median length of hospital stay was 7 days, which aligns with the results from Norway (7 days) and Sweden (6 days) [9, 30]. Importantly, 13% of the patients in our cohort were classified as having severe disease, in agreement with the Norwegian (14%) and Swedish results (11%) [9, 30]. In contrast, 12% of our. XNXX.COM 'red tbe' Search, free sex videos
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IntroductionTick-borne encephalitis (TBE) is an infection of the central nervous system (CNS) caused by the tick-borne encephalitis virus (TBEV)—an infection of increasing public concern [1].TBEV is mainly transmitted to humans by infected ticks [2]. Three clinically important TBEV subtypes exist: the European (TBEV-Eu), the Siberian (TBEV-Si), and the Far Eastern (TBEV-FE) [3]. TBEV-Eu, transmitted by ticks of the species Ixodes Ricinus, seems to have a milder clinical course compared to the other subtypes and is asymptomatic in approximately two-thirds of the cases [2, 4]. A Danish study showed that 20% of forestry workers on the island of Bornholm, an endemic TBEV area, were seropositive without recollection of symptoms [5]. Symptomatic cases usually have a biphasic course with an initial flu-like phase. After a shorter symptom-free period, typically of a week, around one-third develop a second phase infection of the CNS [2]. This infection ranges from mild meningitis to severe encephalitis, with or without myelitis or radiculitis [6]. In adults, the case-fatality rate of TBEV-Eu is reported to be about 1% and up to 50% experience long-lasting neurological sequelae [7]. TBE can be prevented by avoiding ticks and by vaccination. As no specific antiviral treatment exists, hospitalized patients are treated symptomatically [8].In recent years, the incidence of TBEV infections has increased in Europe, likely due to climate change prolonging the transmission season and expanding endemic areas, as well as an increase in outdoor activities, especially during the COVID-19 pandemic [9,10,11]. A total of 3650 TBEV cases were reported from European Union/European Economic Area (EU/EEA) countries in 2022 [12]. The majority were diagnosed from June to November, when the ticks are most active [2, 12].In Denmark, TBE has been observed since the 1950s, limited to a few (one to five) yearly cases on Bornholm [4]. In 2008–2009, the first cases outside Bornholm were identified, and in 2019, a new risk area was established in North Zealand. In November 2023, TBE became a notifiable disease, with cases increasing to 28 that year [13]. TBE diagnostics and national reporting to the European Centre for Disease Prevention and Control’s (ECDC) surveillance system (TESSy) are centralizedSchrodinger.Suites. .CRACKFiX.ISO-TBE - srrDB
Cohort were admitted to the ICU, which was a higher percentage than in the Norwegian (5%) and Swedish (6%) studies [9, 30]. Approximately a third of the patients in our study were discharged to neurorehabilitation (highly specialized or municipal), which is less than in the German study by Nygren et al. (42%), but higher than in the Norwegian (22%) [9, 31]. Two patients had a fatal outcome, both men in their late 60 s with substantial comorbidities, in accordance with previous studies showing pre-existing comorbidities are risk factors for severe disease and death [28]. Interestingly, in one patient, the disease course of TBE was complicated by anti-NMDAR autoimmune encephalitis, a diagnosis mainly associated with HSV-1 encephalitis [32, 33]. A single similar case from Italy has previously been reported in the literature [34].Around 20% had MRI lesions attributed to TBE (leptomeningeal enhancement and signs of meningoencephalomyelitis/-radiculitis) in alignment with previous studies [6, 9]. TBEV has a predilection for thalami, basal ganglia, cerebellum, and anterior horns of the spinal cord. However, MRI abnormalities, if present, are generally unspecific and resemble those seen in other CNS infections [35]. In contrast, HSV-1 encephalitis usually exhibits a typical pattern on MRI involving the limbic system, which our HSV-1 cohort also supported [21].CSF showed typical moderate pleocytosis with mononuclear predominance [6]. Four patients (4/52, 8%) were without pleocytosis (with lumbar puncture 7 to 30 days after onset of first phase), and all four had a favorable GOS score at 1-month follow-up. This percentage aligns with the Norwegian cohort, where 7% of the TBE patients with CNS infection had a normal CSF white blood cell count (disease course ranging from mild to severe infection) [9]. This finding highlights the point that patients without pleocytosis should still be examined for TBEV serology if the clinical course is suggestive of TBE.In general, patients with TBE are hospitalized when CNS symptoms manifest in the second phase of the disease. At this stage, the diagnosis relied on serology as described in other studies [6]. TBEV RNA was only detected in CSF in a few patients (6%) consistent with previous findings [36].. XNXX.COM 'red tbe' Search, free sex videos serial 783A2-8A serial 783A2-8A G32A2-8B088-TBE R11A2-8B041-TBE I35A2-8B069-TBE H30A2-8B036-TBE F33A2-8B021-TBE L82A2-8B068-TBE Z30A2-8B038-TBESchrodinger.Suites. .MACOSX.ISO-TBE - srrDB
Defined as receiving treatment with immune-suppressive chemotherapy or corticosteroids, solid or hematological cancer, alcohol abuse, diabetes mellitus, congenital or acquired immunodeficiency, including human immunodeficiency virus infection [15].The clinical presentation of TBE was classified as mild, moderate, or severe in accordance with previously published classifications [24]. Mild disease was defined as symptoms consistent with viral meningitis. Moderate disease was defined as slightly altered consciousness and/or diffuse or focal neurological symptoms. Severe disease was defined as altered consciousness and/or multifocal neurological symptoms. All patients with signs of encephalitis were classified as having moderate or severe disease.Outcome was measured as the Glasgow Outcome Scale (GOS) score: (1) Death, (2) A vegetative state, (3) Severe sequelae and dependency upon others in daily life, (4) Moderate sequelae but with the ability to live independently, and (5) No or only mild sequelae [25]. GOS score 1–4 was categorized as an unfavorable outcome. GOS score was registered at three timepoints: Discharge, 1-month, and 3-month follow-up. In case of a missing value, the GOS score at the previous timepoint was carried forward, if the patient had a favorable outcome (i.e., GOS score 5) or death (i.e., GOS score 1). Furthermore, information on self-reported residual symptoms in terms of fatigue, headache, cognitive impairment (memory and concentration), irritability, impaired hearing or hyperacusis, and objective residual symptoms such as speech disturbances, paresis, and paresthesia were retrieved at 6-month follow-up or later.HSV-1 patientsWe obtained data on date and place of admission, basic demographics, CCI score, immunodeficiency, admission to the ICU, diagnostic work-up in terms of neuroimaging, and GOS score at discharge, 1-month, and 3-month follow-up.Statistical analysisCategorical variables were reported as proportions and percentages, and continuous variables as medians, with interquartile ranges (IQR). The difference in age means was analyzed with an unpaired t-test. Differences in the likelihood of an unfavorable outcome (GOS score 1–4) between the TBE cohort and the HSV-1 cohort were evaluated at three timepoints (discharge, 1-month, and 3-month follow-up) using a logistic regression model accounting for age and sex. Analyses were repeated exclusively on the subgroup of TBE patients with encephalitis and their respective matched HSV-1 case. All analysesComments
Thus, TBEV PCR should be reserved for immunocompromised patients, who have difficulties activating an antibody response [37]. Most cases were also tested for Lyme neuroborreliosis due to a history of tick bite. In contrast to the Norwegian study, in which a few (5%) of the TBE patients also had a positive Bb intrathecal antibody index, none in our cohort did, suggesting that co-infection is not common in Denmark [9]. Nonetheless, LNB is a common infection of the nervous system in Denmark with an incidence of 2.6/100,000 individuals per year [38].The incidence of TBE increased in our study period, except for a decrease in 2020, which was likely due to COVID-19 travel restrictions resulting in fewer imported cases (Fig. 3). We also observed an increase in test rates, although less than the corresponding incidence rates, along with the positivity rates. The test rate increase in 2018–2019, without an accompanying equivalent incidence rate increase, could be due to the establishment of a new risk area in North Zealand in 2019 (Fig. 3) [4, 13]. Altogether, our data suggested that the increase in TBE cases in the study period was real rather than due to increased test activity.In Denmark, TBE vaccination is self-financed. Currently, national guidelines recommend TBE vaccination for people walking on trails in risk areas combined with regular tick bites, or who walk outside trails in forests and scrubs during the transmission season. In this cohort, only one patient was fully vaccinated and one patient partly, whereas an additional 14 individuals were eligible for vaccination according to guidelines (i.e., living or going on vacation, hunting, doing sports (geocaching, running) or working (woodcutter) in an endemic area) [39]. Our data suggest self-perceived risk of TBE infection may be underestimated by people at risk. Increased public awareness due to media attention on TBE in Denmark has led to a raised vaccine demand in the last few years.Strengths and limitationsThe nationwide design with complete long-term follow-up is an important strength of our study. The comparison to matched controls with HSV-1 encephalitis allowed us to contextualize the morbidity and mortality of TBE, while the matched
2025-03-27TBE patients, although this difference was not seen when we only considered TBE cases with encephalitis. From 2015 to 2023, the incidence rate of TBE increased more than the test rate. This indicated a real increase in TBE cases, and was supported by an increasing positivity rate. ReferencesFactsheet about tick-borne encephalitis (TBE) [Internet] (2017) Available from: P, Strle F (2015) Tick-borne encephalitis: a review of epidemiology, clinical characteristics, and management. World J Clin Cases 3(5):430–441Article PubMed PubMed Central Google Scholar Beauté J, Spiteri G, Warns-Petit E, Zeller H (2018) Tick-borne encephalitis in Europe, 2012 to 2016. Euro Surveill 23(45):1800201Article PubMed PubMed Central Google Scholar The_TBE_Book_7th_Edition [Internet]. Available from: Serum Institut. TBE (Tick-borne Encephalitis) [Internet]. Available from: L, Vapalahti O (2008) Tick-borne encephalitis. Lancet 371(9627):1861–1871Article PubMed Google Scholar Nygren TM, Pilic A, Böhmer MM, Wagner-Wiening C, Wichmann O, Hellenbrand W (2023) Recovery and sequelae in 523 adults and children with tick-borne encephalitis in Germany. Infection 51(5):1503–1511Article PubMed PubMed Central Google Scholar Kaiser R (2008) Tick-borne encephalitis. Infect Dis Clin North Am 22(3):561–75Article PubMed Google Scholar Skudal H, Lorentzen ÅR, Stenstad T, Quist-Paulsen E, Egeland J, Fevang B et al (2024) Clinical characteristics and factors affecting disease severity in hospitalized tick-borne encephalitis patients in Norway from 2018 to 2022. Eur J Clin Microbiol Infect Dis. PubMed PubMed Central Google Scholar Riccardi N, Antonello RM, Luzzati R, Zajkowska J, Di Bella S, Giacobbe DR (2019) Tick-borne encephalitis in Europe: a brief update on epidemiology, diagnosis, prevention, and treatment. Eur J Intern Med 62:1–6Article PubMed Google Scholar Jore S, Viljugrein H, Hjertqvist M, Dub T, Mäkelä H (2023) Outdoor recreation, tick borne encephalitis incidence and seasonality in Finland, Norway and Sweden during the COVID-19 pandemic (2020/2021). Infect Ecol Epidemiol 13(1):2281055PubMed PubMed Central Google Scholar Tick-borne encephalitis Annual Epidemiological Report 2022Statens Serum Institut. TBE - opgørelse over sygdomsforekomst 2020–2023 [Internet]. Available from: mange bestillinger af vaccinationer mod TBE-virus fra flåter [Internet]. Available from: J, Larsen L, Brandt CT, Wiese L, Hansen BR, Andersen CØ et al (2021) Existing data sources for clinical epidemiology: The Danish Study Group of Infections of the Brain Database (DASGIB). Clin
2025-04-19At Statens Serum Institut (SSI). SSI is responsible for monitoring epidemic diseases and providing risk estimations. The increase in TBE cases and new geographical risk areas led to public concern and an unprecedented vaccine demand, and in June 2023, SSI reported having delivered a year’s normal consumption of vaccines within a few weeks [14].The aim of this study was to make a first-time description of the disease course in adult patients hospitalized with TBE in Denmark and determine the yearly incidence and test activity of TBE from 2015 to 2023. This description includes clinical characteristics, objective findings, diagnostic workup, and outcome in terms of sequelae. Outcome was compared to a matched cohort of patients hospitalized with herpes simplex virus type 1 (HSV-1) encephalitis to contextualize the course of TBE.Materials and methodsStudy designWe performed a nationwide prospective cohort study of all adults hospitalized with TBE at departments of infectious diseases in Denmark between 1st of January 2015 and 31st of December 2023.SettingIn December 2023, the total population of Denmark numbered 5.9 million people. In Denmark, healthcare is tax-financed and provided to all residents free of charge. A unique ten-digit personal identification number is assigned to all Danish residents at birth or upon immigration and can be used for linkage of all healthcare information at an individual level.Data sourcesThe Danish Study Group of Infections of the Brain (DASGIB) is a nationwide, population-based, prospective cohort study enrolling all patients ≥ 18 years with a CNS infection managed by departments of infectious diseases in Denmark since 2015 [15]. We used the DASGIB database to identify all adults hospitalized with TBE in the inclusion period. Additionally, a cohort of matched controls with HSV-1 encephalitis was identified. Subjects were matched 1:1 on sex and age ± 5 years. One HSV-1 patient was used as a control for two different TBE patients due to lacking matches.TBE diagnostics (polymerase chain reaction (PCR) and serology) are centralized at SSI. TBEV-IgM and –IgG antibodies in serum and/or cerebrospinal fluid (CSF) were measured using the Serion FSME/TBE Virus ELISA (Serion Diagnostics, Germany) following instructions of the manufacturer. TBEV-RNA in serum and/or
2025-04-18CSF was detected with real-time PCR.To calculate the yearly incidence of TBE from 2015 to 2023, numbers on all second phase TBE cases, including sex and age (including patients 13]. Numbers on the yearly Danish population including sex and age were retrieved from Statistics Denmark, the central authority on Danish statistics [16].To calculate the yearly test rate of TBE from 2015 to 2023, data on TBE tests were retrieved from The Danish Microbiology Database (MiBa) (including patients 17]. Every tested person only appeared once, regardless of the number of tests, per calendar year from 2015 to 2023.Study populationStudy participants fulfilled the DASGIB criteria for CNS infections [15]. Meningitis was defined as a clinical presentation consistent with viral meningitis (e.g., headache, neck stiffness, photophobia, hyperacusis, fever) without signs of encephalitis. Encephalitis was defined according to the International Encephalitis consortium [18]. Meningoencephalomyelitis/-radiculitis was defined as encephalitis with involvement of the spinal cord or spinal nerve roots. Pleocytosis was defined as ≥ 10 × 106 cells/L in the CSF [15].Patients with TBE were defined by either a) detection of TBEV-IgM and -IgG antibodies in serum, b) TBEV-IgM in CSF, c) seroconversion or four-fold increase of TBEV-specific antibodies in paired serum samples, or d) detection of TBEV RNA by PCR in blood or CSF [19, 20].Patients with HSV-1 encephalitis had a clinical presentation consistent with encephalitis and at least one of the following: a) detection of HSV-1 DNA in CSF by PCR or b) positive HSV-1 intrathecal antibody index test [21].VariablesTBE patientsWe obtained data on date and place of admission, basic demographics (age, sex, physical and functional status before admission), travel history, vaccination status for TBE and other flaviviruses (dengue, yellow-fever, and Japanese encephalitis virus), Charlson Comorbidity Index (CCI) score [22], immunodeficiency, history of tick bite, geographic location for tick bite, duration of symptoms, defined time from onset of symptoms to admission to hospital, clinical presentation, length of hospital stay, admission to the intensive care unit (ICU), and diagnostic work-up (biochemical and microbiological analyses of blood and CSF, and neuroimaging). Data on vaccination status were retrieved from the Danish Vaccination Register [23]. Immunodeficiency was
2025-03-31Was most frequent among the 40- to the 70-year-olds, and men were tested more often than women (Supplementary Fig. 2).Fig. 4Tick-borne encephalitis test rate in the five different regions in Denmark from 2015 to 2023. Every tested person only appears once per calendar yearFull size imageDiscussionTBE is an emerging disease of public health importance associated with significant morbidity. This is the first nationwide study in Denmark to describe the clinical characteristics and outcome of adults with TBE, as well as the TBE incidence in relation to test activity.The clinical presentation, mortality, and outcome were in alignment with reports from other European countries. An unfavorable outcome was associated with pre-existing comorbidities and older age. TBE was associated with less mortality and morbidity compared to a matched cohort of HSV-1 encephalitis patients. Consistent with data from ECDC showing an increase in TBE incidence in EU/EEA countries after 2018, we observed an incidence rate ratio of 14 in 2023 with 2015 as ref. [12].The clinical characteristics of this TBE cohort were similar to formerly described TBEV-Eu cohorts in terms of basic characteristics, disease presentation, morbidity, and mortality [2, 3, 6, 9, 28,29,30]. Approximately half of the cases in our study had encephalitis. This is a lower percentage than the results from Norway in the study by Skudal et al. (105/153, 69%), but similar to the results from Sweden in the study by Bartholdsson et al. (381/703, 54%) [9, 30]. The patients with encephalitis in our cohort were significantly older than those with meningitis. Nearly three out of four patients had a biphasic course, in alignment with previous findings, with the most common first and second phase symptoms being headache and fever [2, 6]. In contrast, only half of the TBE cases in Norway reported a biphasic course (53%) [9].The median length of hospital stay was 7 days, which aligns with the results from Norway (7 days) and Sweden (6 days) [9, 30]. Importantly, 13% of the patients in our cohort were classified as having severe disease, in agreement with the Norwegian (14%) and Swedish results (11%) [9, 30]. In contrast, 12% of our
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