Genotype II, Ocular Toxoplasmosis With Recurrences, Toxoplasmosis Infection
Conditions
Brief summary
Ocular toxoplasmosis (OT) is a major cause of visual impairment worldwide. OT is responsible for 30 to 50% of posterior uveitis. It is characterized by dormant infections that may reactivate without known reasons, causing severe irreversible visual loss. The overall recurrence rate of OT in Europe is greater than 80% for patients and may range from one episode to 11 episodes (1% of OT) in the most extreme cases. Current treatments do not reduce the risk of recurrences and the risk of toxoplasmosis recurrence cannot be predicted in these immunocompetent patients. These clinical and biological expression changes might be related to an individual genetic susceptibility of each patient. The advanced analysis of the entire genome now possible to consider the project.
Interventions
BIOLOGICALseropositive for Toxoplasma gondii
blood sample
Sponsors
University Hospital, Strasbourg, France
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
12 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* seropositive for Toxoplasma gondii (for patient and parents) * Infection with genotype II (for patient and parents) * ocular toxoplasmosis recurrences \>5 (patients only)
Exclusion criteria
* Parents seronegative for T. gondii infection * Infection with others genotypes than type II
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Highlighting of genetic mutations associated with the susceptibility to Toxoplasma gondii.severe eye recurrences. Mutation analysis will be done by exome sequencing of the subjects included in this study | This analysis will be performed on a blood sample taken in patients included in the inclusion visit |
Countries
France
Outcome results
None listed