Microbiological Diagnosis of Infectious Keratitis to Pathogenic Fastidious Germs

Study Overview
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Brief Summary
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Infectious keratitis are favored by the circumstances causing the small trauma of the corneal epithelium, corneal surgery, corneal dryness under health system such as Sjögren's syndrome rheumatoid arthritis, or much more frequently wearing contact lenses. If the majority of infectious keratitis are favourable, some lead to serious injury of the cornea, or even corneal perforation which result an endophthalmitis. This unfavourable evolution may lead to blindness due to corneal damage, the endo-ocular lesions or enucleation of the eyeball. This negative evolution is encountered while the infectious keratitis due to tedious germs of difficult diagnosis such as nontuberculous Mycobacterial, fungal infections, fungal keratitis, amoebic keratitis, and certain viral keratitis. The microbiological diagnosis of routine is based on the systematic search for pathogens tedious from invasive sampling of cornea by vaccinostyle. We set up a new non-invasive corneal swab diagnostic method.

Detailed Description
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Primary Purpose: Compare the ability diagnostic of non-invasive sampling swab corneal versus the gold standard, (invasive vaccinostyle uptake) for the systematic search for pathogens tedious in corneal specimens. Hypothesis: The diagnostic strategy using a microbial testing of cornea method has a sensitivity of 90% and a specificity of 80% or more over the policy diagnostic using a sampling by vaccinostyle method. Primary outcome measures: Sensitivity, specificity, positive and negative predictive values, Diagnostic odds ratio.

Official Title
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Microbiological Diagnosis of Infectious Keratitis to Pathogenic Fastidious Germs

Conditions
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Infectious Keratitis

Intervention / Treatment
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* Other: Blood sampling


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient is more than 18 years old. Patient with a prescription of a microbiologic diagnostic of keratitis Patient who do not declined to have his medical records reviewed for research Patient with health insurance Exclusion Criteria: minor patient (<18 years). Pregnant or breastfeeding women. Major Patient under guardianship. Patient in vital emergency. Private Patient liberty or under court order. Patient refusing to sign the informed consent form

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Patient with a prescription of a microbiologic diagnostic of<br>Patient with a prescription of a microbiologic diagnostic of keratitis | Other: Blood sampling<br>* Detection of bacteria will be performed on a blood sample<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sensitivity, specificity, positive and negative predictive values, Diagnostic odds ratio. |  | 1 day |