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Study to determine the proportion of cases of CNS disease of unknown suspected infectious aetiology caused by Tick-Borne Encephalitis Virus (TBEV) [and bacteria belonging to genospecies of the Borrelia burgdorferi sensu lato group] in Japan

Study to determine the proportion of cases of CNS disease of unknown suspected infectious aetiology caused by Tick-Borne Encephalitis Virus (TBEV) [and bacteria belonging to genospecies of the Borrelia burgdorferi sensu lato group] in Japan - Study to determine the proportion of cases of CNS disease of unknown suspected infectious aetiology caused by Tick-Borne Encephalitis Virus (TBEV) [and bacteria belonging to genospecies of the Borrelia burgdorferi sensu lato group] in Japan

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000046173
Enrollment
400
Registered
2021-11-25
Start date
2021-11-29
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

CNS disease of unknown infectious aetiology

Interventions

None listed

Sponsors

National Center Hospital, National Center of Neurology and Psychiatry
Lead Sponsor
Nagasaki University Yamaguchi University Pfizer Orth Serology Testing Laboratory Pfizer Inc(US) Pfizer Japan
Collaborator

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1.Inpatient or outpatient (more than 1 year of age) of participating hospital at time of diagnosis 2.Diagnosed with CNS disease of unknown infectious aetiology (See Appendix 3 for definition of CNS of unknown infectious aetiology) 3.In the retrospective part of the study, subjects will be enrolled in this study according to the opt-out process, after the ethical committee has approved this process. In the prospective part of the study, evidence of a signed and dated informed consent form indicating that the patient or their legally authorized representative(s) have been informed of all pertinent aspects of the study and agree to participate. 4.In the retrospective part of the study, availability of residual CSF and/or sera sample(s) collected as part of standard of care. In the prospective part of the study, agreement to blood collection.

Exclusion criteria

Exclusion criteria: 1.Previous enrolment in this study for the same episode of the disease

Design outcomes

Primary

MeasureTime frame
The proportion of cases of CNS disease of unknown suspected infectious aetiology caused by Tick-Borne Encephalitis Virus (TBEV)

Secondary

MeasureTime frame
Demographics, clinical characteristics, and clinical outcomes of patients diagnosed with TBE Proportions of patients with risk factors per capita (100K persons) The annual incidence rate of TBE in Japan per capita (TBE cases per 100K persons per year)

Countries

Japan

Contacts

Public ContactShunji Ogami

a2healthcare Corporation Clinical Development Division Evidence solution Department

TBE_LB_epistudy_MO@a2healthcare.com03-3830-1075

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026