Aseptic Meningitis, Bacterial Meningitis, Brain Abscess, Central Nervous System Infections, Cerebral Abscess, Encephalitis, Lyme Disease, Meningitis, Neuroborreliosis, Neurosyphilis, Tertiary Syphilis, Viral Meningitis
Conditions
Keywords
Nationwide prospective observational cohort study, Epidemiology, Central Nervous System Infections, Meningitis, Encephalitis, Brain abscess, Lyme disease, Neuroborreliosis, Neurosyphilis, Tertiary syphilis
Brief summary
The Danish Study Group of Infections of the Brain is a collaboration between all departments of infectious diseases in Denmark. The investigators aim to monitor epidemiological trends in central nervous system (CNS) infections by a prospective registration of clinical characteristics and outcome of all adult (\>17 years of age) patients with community-acquired CNS infections diagnosed and/or treated at departments of infectious diseases in Denmark since 1st of January 2015.
Detailed description
The investigators include data on diagnosis at admission, symptoms and signs on admission, character and timing of diagnostic work-up and treatment and outcome assessed by the Glasgow Outcome Score (GOS). Diagnostic work-up and treatment is left at the discretion of the local physician and therefore not standardised In general any symptoms/deficits should only be listed if they are 'new' to the patient, e.g. a known palsy of the facial nerve should not be listed as a new relevant finding at admission. On the other hand, worsening of a known neurological deficit should be listed under signs in the given instrument (bacterial meningitis, encephalitis, neuroborreliosis etc). Likewise, for outcome only changes in pre-morbid conditions should be listed including place of residence, functional status, neurological deficits etc. Time of admission is obtained in prioritized order from the ambulance charts or notifications of arrival by secretaries or nurses in the emergency departments. Timing of lumbar puncture and cranial imaging is extracted from the electronic records at the departments of biochemistry or radiology while timing of antibiotic therapy for meningitis is identified in electronic medication systems. Time to lumbar puncture, cranial imaging and antibiotic therapy is calculated as time from arrival at hospital to each of the above events. Quality control of case enrollment is ensured by ad hoc case-to-case discussions and at study group meetings 2-3 times a year To ensure completeness of reported CNS infections annual searches of selected International Classification of Diseases version 10 (ICD-10) codes are performed in local administrative databases at each department: A17 A32.1 A32.7 A39.0 A52.1-52.3 A69.2 (neuroborreliosis) A83 A84 A85 A87 A89 B00.3-00.4 B01.0-01.1 B02.0-02.0 B582 B451 B375 G00 G01 G02 G03 G04 G05 G06 G07
Interventions
OTHERCommunity-acquired CNS infections
Prospective observational registration of clinical characteristics and outcome
Sponsors
Danish Study Group of Infections of the Brain
Aalborg University Hospital
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
Definitions of central nervous system infections: For all cases with unproven aetiologies no alternative diagnosis than CNS infection is thought more likely after completed multidisciplinary diagnostic work-up. Viral meningitis inclusion criteria \- All patients have to have a clinical presentation consistent with non-bacterial meningitis (e.g. headache, neck stiffness, photo- or phonophobia, fever) and Cerebrospinal fluid leukocytes\>10 cells/ml Patients with viral meningitis with undetermined pathogen have to have: * CSF leukocytes\> 10/mL and no other more probable diagnosis assessed by the local investigator. In case of doubt, patients are discussed with the DASGIB secretary and chair or at meetings. Bacterial meningitis inclusion criteria - All patients have to have a clinical presentation consistent with bacterial meningitis (e.g. headache, neck stiffness, fever, altered mental status) and Proven bacterial aetiology (CSF or blood culture/DNA based technology or antigen tests) Patients with bacterial meningitis in whom the bacteria cannot not be cultured or identified by DNA-based technologies have to have: \- CSF leukocytes\> 10/mL and no other more probable diagnosis assessed by the local investigator. In case of doubt, patients are discussed with the DASGIB secretary and chair or at meetings. Encephalitis inclusion criteria - All patients have to have a clinical presentation consistent with encephalitis (e.g. headache, fever, focal neurological deficit, altered mental status \>24 hours) as defined by the International Encephalitis Consortium (Venkatesan A et al., Clin Infect Dis 2013; doi:10.1093/cid/cit458.). Encephalitis
Exclusion criteria
\- We exclude cases of proven or suspected autoimmune encephalitis. Primary brain abscess inclusion criteria \- All patient have a clinical presentation consistent with brain abscess (e.g. headache, focal neurological deficit, mass lesion on cranial imaging) and \- Proven microbiological aetiology by culture/DNA-based technology from pus from brain abscess or blood or CSF or \- Aspiration of pus from the brain abscess or \- Response to antimicrobial treatment or \- Tumour ruled out or \- Tumour thought less probable than abscess on MRI using diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) sequences. Lyme neuroborreliosis inclusion criteria \- A clinical presentation consistent with neuroborreliosis (e.g. radiculopathy) and \- CSF pleocytosis\>10 leukocytes/mL and \- Positive intrathecal B.burgdorferi antibody production index. Neurosyphilis inclusion criteria - A clinical presentation consistent with neurosyphilis (e.g. 'encephalitis-like symptoms', dementia, ocular or otogenic syphilis) and either \- Positive syphilis serology in serum combined with CSF leukocytes\>10/mL or \- CSF syphilis antibodies.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Incidence | One year | Incidence of CNS infections in the adult population (\>17 years of age) in Denmark. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Glasgow Outcome Scale score for viral meningitis | 30 days | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
| Glasgow Outcome Scale score for bacterial meningitis | 30 days | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
| Glasgow Outcome Scale score for encephalitis | 30 days | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
| Glasgow Outcome Scale score | One month after end of treatment | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
| Glasgow Outcome Scale score for neuroborreliosis | 2 weeks | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
| Glasgow Outcome Scale score for brain abscess | 8 weeks | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
| Glasgow Outcome Scale score for neurosyphilis | 2 weeks | A five tier assessment of functional status, 1=Death, 2=vegetative state, 3=dependency on others for daily activities, 4=some sequelae but able to live independently, 5= No or only minor sequelae |
Countries
Denmark
Contacts
Primary ContactJacob Bodilsen, MD
Backup ContactHenrik Nielsen, Professor
Outcome results
None listed