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Intertriginous/Periorificial Dermatoses in Patients With IBD on Anti-TNFα: Relative Abundance of Staphylococcus Aureus Within the Lesion Microbiota and Clinical Correlation (micSPIDER). (micSPIDER)

4 september 2026 uppdaterad av: Centre Hospitalier Universitaire de Nīmes

Inflammatory Skin Diseases of Skin Folds and Perioral Areas (SPIDER) in Patients With Chronic Inflammatory Bowel Disease on Anti-TNFα Therapy: Characterization of the Staphylococcus Aureus Population Within the Lesion Microbiota and Correlation With Clinical Findings

The main objective of this study is to evaluate the change in the relative abundance of S. aureus within the lesion-site skin microbiota in SPIDER patients (change between inclusion and 6 months), and to assess whether this change in S. aureus abundance is associated with a favorable (or unfavorable) evolution of the wounds over the same period.

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Detaljerad beskrivning

Inflammatory bowel diseases (IBD), including Crohn's disease (CD) and ulcerative colitis (UC), affect around 2.5 million people worldwide, including 300,000 in France. These conditions mainly impact young adults and follow a relapsing-remitting course with significant morbidity. CD is a chronic, debilitating disease caused by complex interactions among genetic, environmental, and microbiota-related factors, leading to transmural inflammation of the digestive tract and both intestinal and extra-intestinal symptoms. UC affects the mucosa of the colon and rectum, with similar gastrointestinal symptoms and frequent cutaneous, ocular, and rheumatologic manifestations.

Treatment aims for deep remission and relies largely on anti-TNFα therapies, complemented by other drugs or surgery; newer biologics like vedolizumab and ustekinumab are also used. However, anti-TNFα-treated patients often develop cutaneous comorbidities, such as psoriasis, granulomatous lesions, or neutrophilic dermatoses. A significant proportion also develop skin infections, commonly due to Staphylococcus aureus. One study reported inflammatory skin lesions in 40% of IBD patients on anti-TNFα, with S. aureus nasal or cutaneous carriage frequently associated. The precise relationship between S. aureus and these lesions, however, remains unclear.

Description of the treatment/strategy/procedure: Swabbing of healthy areas and lesion sites will be performed in the same way in the SPIDER+ and SPIDER- groups at Day 0 (D0). Microbiota sequencing and cultures will be carried out under the same conditions in both groups.

Description of follow-up: SPIDER+ patients will be recruited from the dermatology departments of the participating university hospitals (CHUs), notably in Montpellier, Millau, and Béziers. They will receive follow-up over a 12-month period, with an inclusion visit followed by two follow-up visits at 6 and 12 months. On the other hand, for SPIDER- patients a follow-up visit will take place at 12 months, in order to record adverse effects of the treatment (anti-TNF).

Studietyp

Observationell

Inskrivning (Beräknad)

82

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studera Kontakt Backup

Studieorter

  • Frankrike
    • Aveyron
      • Millau, Aveyron, Frankrike, 12100
    • Gard
      • Nîmes, Gard, Frankrike, 30029
        • Nîmes University Hospital
        • Kontakt:
        • Huvudutredare:
          • Natacha CATTEAU, Dr.
        • Underutredare:
          • Blanche BERGERET, Dr.
        • Underutredare:
          • Ludovic CAILLO, Dr.
        • Underutredare:
          • Myriam MARQUE, Dr.
    • Hérault
      • Béziers, Hérault, Frankrike, 34500
        • CHU de Béziers
        • Kontakt:
          • Louise GUILLON, Dr.
        • Huvudutredare:
          • Louise GUILLON, Dr.
        • Underutredare:
          • Mohamed BEJAOUI, Dr.
      • Montpellier, Hérault, Frankrike, 34090
        • CHU de Montpellier, Hôpital Arnaud de Villeneuve
        • Kontakt:
        • Huvudutredare:
          • Grégoire LAVAUD, Dr.
        • Underutredare:
          • Yasmine JERIDI, Dr.
        • Underutredare:
          • Margot MIGNOT, Dr.
        • Underutredare:
          • Laura KOLLEN, Dr.
      • Montpellier, Hérault, Frankrike, 34090
        • Montpellier University Hospital, Saint Eloi
        • Underutredare:
          • Romain ALTWEGG
        • Kontakt:
        • Huvudutredare:
          • Aurélie DU THANH
        • Underutredare:
          • Anne BOZON
        • Underutredare:
          • Lucile BOIVINEAU

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Barn
  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Nej

Testmetod

Icke-sannolikhetsprov

Studera befolkning

Adult or pediatric patient (>4 years old), diagnosed with IBD and receiving anti-TNFα therapy, with skin lesions such as crusted rhinitis ± inflammatory alopecic scalp lesions ± intertrigo of the large skin folds ± folliculitis (Scalp and Periorificial Inflammatory DERmatis, SPIDER)

Beskrivning

Inclusion Criteria:

  • Diagnosed with IBD
  • Receiving anti-TNFα therapy
  • WITH skin lesions such as crusted rhinitis ± inflammatory alopecic scalp lesions ± intertrigo of the large skin folds ± folliculitis (Scalp and Periorificial Inflammatory DERmatis, SPIDER)
  • Parental consent for minor patients
  • Patient who has provided free and informed consent and has signed the consent form
  • Patient affiliated to or beneficiary of a health insurance system

Exclusion Criteria:

  • Patients for whom a change in therapy is planned within 6 months (SPIDER+).
  • Patients receiving antibiotics (systemic or topical) at the time of enrollment, with a window of at least 1 month.
  • Patients who have participated in a clinical drug trial within the last three months
  • Patients currently in an exclusion period determined by a previous study
  • Patients under legal guardianship, conservatorship, or trusteeship
  • Patients who refuse to sign the informed consent form
  • Pregnant or breastfeeding patients.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Kohorter och interventioner

Grupp / Kohort
SPIDER+ group
Patients diagnosed with IBD receiving anti-TNFα therapy with skin lesions such as crusted rhinitis ± inflammatory alopecic scalp lesions ± intertrigo of the large skin folds ± folliculitis (Scalp and Periorificial Inflammatory DERmatis, SPIDER)
SPIDER- group (control group):
Patients diagnosed with IBD receiving anti-TNFα therapy for more than 1 year, WITHOUT dermatological lesions suggestive of SPIDER

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Relative abundance of S. aureus in the SPIDER+ group
Tidsram: Month 0, baseline
Number of read sequences corresponding to S. aureus divided by the total number of read sequences (%) assessed after sequencing swabs from SPIDER lesions
Month 0, baseline
Relative abundance of S. aureus in the control group
Tidsram: Month 0, baseline
Number of read sequences corresponding to S. aureus divided by the total number of read sequences (%) assessed after sequencing swabs from healthy areas
Month 0, baseline
Relative abundance of S. aureus in the SPIDER+ group
Tidsram: Month 6
Number of read sequences corresponding to S. aureus divided by the total number of read sequences (%) assessed after sequencing swabs from SPIDER lesions
Month 6
Relative abundance of S. aureus according to the Physician's Global Assessment score in the SPIDER+ group
Tidsram: Month 0, baseline

The Physician's Global Assessment score is a clinical scale widely used in dermatology to assess the overall severity of a skin condition. Since there is no specific score for these lesions, it is the only one that can be used. The Physician's Global Assessment score is a global visual assessment of the severity of skin lesions, performed by a healthcare professional (investigator). The Physician's Global Assessment score is an ordinal scale, typically ranging from 0 to 5. A common goal in studies is to achieve a Physician's Global Assessment score of 0 or 1 (resolved or minimal), often with an improvement of at least 2 points from the baseline score.

The Physician's Global Assessment is often used as an endpoint in dermatological clinical trials. It is always combined with a quality-of-life score.
Month 0, baseline
Relative abundance of S. aureus according to the Physician's Global Assessment score in the SPIDER+ group
Tidsram: Month 6

The Physician's Global Assessment score is a clinical scale widely used in dermatology to assess the overall severity of a skin condition. Since there is no specific score for these lesions, it is the only one that can be used. The Physician's Global Assessment score is a global visual assessment of the severity of skin lesions, performed by a healthcare professional (investigator).The Physician's Global Assessment score is an ordinal scale, typically ranging from 0 to 5. A common goal in studies is to achieve a Physician's Global Assessment score of 0 or 1 (resolved or minimal), often with an improvement of at least 2 points from the baseline score.

The Physician's Global Assessment is often used as an endpoint in dermatological clinical trials. It is always combined with a quality-of-life score.
Month 6
Relative abundance of S. aureus according to the Dermatology Quality of Life Index in the SPIDER+ group
Tidsram: Month 0, baseline
The Dermatology Quality of Life Index is a standardized, validated, and widely used questionnaire designed to assess the impact of a dermatological condition on a patient's quality of life. It consists of 10 questions, each scored from 0 to 3 points, for a total score ranging from 0 to 30. Topics covered include: symptoms and feelings, discomfort, daily activities, and personal relationships.The optimal goal is a maximum score of 5 points or a reduction of at least 4 points compared to baseline (M0).
Month 0, baseline
Relative abundance of S. aureus according to the Dermatology Quality of Life Index in the SPIDER+ group
Tidsram: Month 6
The Dermatology Quality of Life Index is a standardized, validated, and widely used questionnaire designed to assess the impact of a dermatological condition on a patient's quality of life. It consists of 10 questions, each scored from 0 to 3 points, for a total score ranging from 0 to 30. Topics covered include: symptoms and feelings, discomfort, daily activities, and personal relationships.The optimal goal is a maximum score of 5 points or a reduction of at least 4 points compared to baseline (M0).
Month 6

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Relative abundance of S. aureus within the lesion microbiota in the experimental group according to the Physician's Global Assessment score
Tidsram: Month 0, baseline

The Physician's Global Assessment score is a clinical scale widely used in dermatology to assess the overall severity of a skin condition. Since there is no specific score for these lesions, it is the only one that can be used. The Physician's Global Assessment score is a global visual assessment of the severity of skin lesions, performed by a healthcare professional (investigator). The Physician's Global Assessment score is an ordinal scale, typically ranging from 0 to 5. A common goal in studies is to achieve a Physician's Global Assessment score of 0 or 1 (resolved or minimal), often with an improvement of at least 2 points from the baseline score.

The Physician's Global Assessment is often used as an endpoint in dermatological clinical trials. It is always combined with a quality-of-life score.
Month 0, baseline
Relative abundance of S. aureus within the lesion microbiota in the experimental group according to the Physician's Global Assessment score
Tidsram: Month 12

The Physician's Global Assessment score is a clinical scale widely used in dermatology to assess the overall severity of a skin condition. Since there is no specific score for these lesions, it is the only one that can be used. The Physician's Global Assessment score is a global visual assessment of the severity of skin lesions, performed by a healthcare professional (investigator). The Physician's Global Assessment score is an ordinal scale, typically ranging from 0 to 5. A common goal in studies is to achieve a Physician's Global Assessment score of 0 or 1 (resolved or minimal), often with an improvement of at least 2 points from the baseline score.

The Physician's Global Assessment is often used as an endpoint in dermatological clinical trials. It is always combined with a quality-of-life score.
Month 12
Relative abundance of S. aureus within the lesion microbiota in the experimental group according to the Dermatology Quality of Life Index
Tidsram: Month 0, baseline
The Dermatology Quality of Life Index is a standardized, validated, and widely used questionnaire designed to assess the impact of a dermatological condition on a patient's quality of life. It consists of 10 questions, each scored from 0 to 3 points, for a total score ranging from 0 to 30. Topics covered include: symptoms and feelings, discomfort, daily activities, and personal relationships.The optimal goal is a maximum score of 5 points or a reduction of at least 4 points compared to baseline (M0).
Month 0, baseline
Relative abundance of S. aureus within the lesion microbiota in the experimental group according to the Dermatology Quality of Life Index
Tidsram: Month 12
The Dermatology Quality of Life Index is a standardized, validated, and widely used questionnaire designed to assess the impact of a dermatological condition on a patient's quality of life. It consists of 10 questions, each scored from 0 to 3 points, for a total score ranging from 0 to 30. Topics covered include: symptoms and feelings, discomfort, daily activities, and personal relationships.The optimal goal is a maximum score of 5 points or a reduction of at least 4 points compared to baseline (M0).
Month 12
Relative abundance of species found in the experimental group (SPIDER+ patients)
Tidsram: Month 0, baseline
Relative abundances (in %) of each bacterial species, calculation of alpha diversity (Shannon index) and beta diversity (Bray-Curtis index) following sequencing of swabs taken from lesions at M0, M6, and M12 in SPIDER+ patients.
Month 0, baseline
Relative abundance of species found in the experimental group (SPIDER+ patients)
Tidsram: Month 6
Relative abundances (in %) of each bacterial species, calculation of alpha diversity (Shannon index) and beta diversity (Bray-Curtis index) following sequencing of swabs taken from lesions at M0, M6, and M12 in SPIDER+ patients.
Month 6
Relative abundance of species found in the experimental group (SPIDER+ patients)
Tidsram: Month 12
Relative abundances (in %) of each bacterial species, calculation of alpha diversity (Shannon index) and beta diversity (Bray-Curtis index) following sequencing of swabs taken from lesions at M0, M6, and M12 in SPIDER+ patients.
Month 12
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: axillary folds
Tidsram: Month 0, baseline
Yes/No
Month 0, baseline
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: axillary folds
Tidsram: Month 6
Yes/No
Month 6
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: axillary folds
Tidsram: Month 12
Yes/No
Month 12
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: nostrils
Tidsram: Month 0, baseline
Yes/No
Month 0, baseline
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: nostrils
Tidsram: Month 6
Yes/No
Month 6
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: nostrils
Tidsram: Month 12
Yes/No
Month 12
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: navel
Tidsram: Month 0, baseline
Yes/No
Month 0, baseline
Relative abundance of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: navel
Tidsram: Month 6
Yes/No
Month 6
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: navel
Tidsram: Month 12
Yes/No
Month 12
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: ears
Tidsram: Month 0, baseline
Yes/No
Month 0, baseline
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: ears
Tidsram: Month 6
Yes/No
Month 6
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: ears
Tidsram: Month 12
Yes/No
Month 12
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: cheek
Tidsram: Month 0, baseline
Yes/No
Month 0, baseline
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: cheek
Tidsram: Month 6
Yes/No
Month 6
Presence of S. aureus in the experimental group (SPIDER+ patients) at different colonization sites: cheek
Tidsram: Month 12
In %
Month 12
Evolution of lesions according to the Physician's Global Assessment score in SPIDER+ patients
Tidsram: Month 6

A "favorable" change in the lesion at Month12 will be defined as:

a decrease of at least 2 points in the Physician's Global Assessment score (0-5, wherein 0 indicates improvement and 5 indicates worsening) compared to M0, or a Physician's Global Assessment score of 1 or less.
Month 6
Evolution of lesions according to the Physician's Global Assessment score in SPIDER+ patients
Tidsram: Month 12

A "favorable" change in the lesion at Month12 will be defined as:

a decrease of at least 2 points in the Physician's Global Assessment score (0-5, wherein 0 indicates improvement and 5 indicates worsening) compared to Month 0, or a Physician's Global Assessment score of 1 or less.
Month 12
Evolution of lesions according to the Dermatology Live Quality Index in SPIDER+ patients
Tidsram: Month 6
A "favorable" change in the lesion at Month12 will be defined as: an optimal target of up to 5 points or a reduction of at least 4 points compared to Month 0.
Month 6
Evolution of lesions according to the Dermatology Live Quality Index in SPIDER+ patients
Tidsram: Month 12
A "favorable" change in the lesion at Month12 will be defined as: an optimal target of up to 5 points or a reduction of at least 4 points compared to Month 0.
Month 12
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: axillary folds
Tidsram: Month 0, baseline
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 0, baseline
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: axillary folds
Tidsram: Month 6
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 6
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: axillary folds
Tidsram: Month 12
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 12
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: nostrils
Tidsram: Month 0, baseline
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 0, baseline
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: nostrils
Tidsram: Month 6
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 6
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: nostrils
Tidsram: Month 12
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 12
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: navel
Tidsram: Month 0, baseline
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 0, baseline
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: navel
Tidsram: Month 6
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 6
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: navel
Tidsram: Month 12
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 12
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: ears
Tidsram: Month 0, baseline
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 0, baseline
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: ears
Tidsram: Month 6
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 6
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: ears
Tidsram: Month 12
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 12
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: cheek
Tidsram: Month 0, baseline
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 0, baseline
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: cheek
Tidsram: Month 6
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 6
Staphylococcus aureus carriage in relation to the relative abundance of S. aureus in SPIDER+ lesion sites: cheek
Tidsram: Month 12
Score/5: 1 point for each staphylococcal colonization site (axillary folds, nostrils, navel, ears) and 1 point for the healthy skin area (cheek) if S. aureus is isolated after culture at M0, M6, and M12 in SPIDER+ patients.
Month 12
Abundance of Staphylococcus aureus and the microbiota (composition, alpha and beta diversity) of a healthy skin area in SPIDER + patients
Tidsram: Month 0, baseline
Relative abundances (in %) of each bacterial species, including S. aureus following sequencing of swabs taken from a healthy skin area in SPIDER+ subjects and from a site at the same location in SPIDER- subjects at time point M0.
Month 0, baseline
Abundance of Staphylococcus aureus and the microbiota (composition, alpha and beta diversity) of a healthy skin area in SPIDER + patients: Alpha diversity
Tidsram: Month 0, baseline
Calculation of alpha diversity (Shannon index) following sequencing of swabs taken from a healthy skin area in SPIDER+ subjects and from a site at the same location in SPIDER- subjects at time point M0.
Month 0, baseline
Abundance of Staphylococcus aureus and the microbiota (composition, alpha and beta diversity) of a healthy skin area in SPIDER + patients: Beta diversity
Tidsram: Month 0, baseline
Calculation of beta diversity (Bray-Curtis index) following sequencing of swabs taken from a healthy skin area in SPIDER+ subjects and from a site at the same location in SPIDER- subjects at time point M0.
Month 0, baseline
Abundance of Staphylococcus aureus and the microbiota (composition, alpha and beta diversity) of a healthy skin area in SPIDER - patients
Tidsram: Month 0, baseline
Relative abundances (in %) of each bacterial species, including S. aureus following sequencing of swabs taken from a healthy skin area in SPIDER+ subjects and from a site at the same location in SPIDER- subjects at time point M0.
Month 0, baseline
Abundance of Staphylococcus aureus and the microbiota (composition, alpha and beta diversity) of a healthy skin area in SPIDER - patients: Alpha diversity
Tidsram: Month 0, baseline
Calculation of alpha diversity (Shannon index) following sequencing of swabs taken from a healthy skin area in SPIDER+ subjects and from a site at the same location in SPIDER- subjects at time point M0.
Month 0, baseline
Abundance of Staphylococcus aureus and the microbiota (composition, alpha and beta diversity) of a healthy skin area in SPIDER - patients: beta diversity
Tidsram: Month 0, baseline
Calculation of beta diversity (Bray-Curtis index) following sequencing of swabs taken from a healthy skin area in SPIDER+ subjects and from a site at the same location in SPIDER- subjects at time point M0.
Month 0, baseline
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: length
Tidsram: Month 0, baseline
Measured in Mb
Month 0, baseline
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: length
Tidsram: Month 6
Measured in Mb
Month 6
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: length
Tidsram: Month 12
Measured in Mb
Month 12
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: guanine-cytosine content
Tidsram: Month 0, baseline
Measured in %
Month 0, baseline
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: guanine-cytosine content
Tidsram: Month 6
Measured in %
Month 6
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: guanine-cytosine content
Tidsram: Month 12
Measured in %
Month 12
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: presence of plasmids
Tidsram: Month 0, baseline
YES / NO
Month 0, baseline
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: presence of plasmids
Tidsram: Month 6
YES / NO
Month 6
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: presence of plasmids
Tidsram: Month 12
YES / NO
Month 12
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: genome alignment
Tidsram: Month 0, baseline
Measured in %
Month 0, baseline
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: genome alignment
Tidsram: Month 6
Measured in %
Month 6
Genomes and phenotypic characteristics of S. aureus strains isolated from SPIDER+ lesion sites, healthy areas, and staphylococcal reservoirs via bacterial culture: genome alignment
Tidsram: Month 12
Measured in %
Month 12
Quantification of messenger RNA from S. aureus virulence genes isolated from SPIDER+ lesion sites
Tidsram: Month 0, baseline
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 0, baseline
Quantification of messenger RNA from S. aureus virulence genes isolated from SPIDER+ lesion sites
Tidsram: Month 6
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 6
Quantification of messenger RNA from S. aureus virulence genes isolated from SPIDER+ lesion sites
Tidsram: Month 12
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 12
Quantification of messenger RNA from S. aureus virulence genes isolated from healthy areas in SPIDER+ patients
Tidsram: Month 0, baseline
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 0, baseline
Quantification of messenger RNA from S. aureus virulence genes isolated from healthy areas in SPIDER+ patients
Tidsram: Month 6
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 6
Quantification of messenger RNA from S. aureus virulence genes isolated from healthy areas in SPIDER+ patients
Tidsram: Month 12
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 12
Quantification of messenger RNA from S. aureus virulence genes isolated from staphylococcal reservoirs
Tidsram: Month 0, baseline
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 0, baseline
Quantification of messenger RNA from S. aureus virulence genes isolated from staphylococcal reservoirs
Tidsram: Month 6
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 6
Quantification of messenger RNA from S. aureus virulence genes isolated from staphylococcal reservoirs
Tidsram: Month 12
Measured via long-read sequencing (MinION, Oxford Nanopore) in µg
Month 12
Real-time monitoring of the growth of S. aureus strains isolated from SPIDER+ lesion sites
Tidsram: Month 0 to Month 12
Real-time monitoring using the Quantum automat, in %
Month 0 to Month 12
Real-time monitoring of the growth of S. aureus strains isolated from apparently healthy areas in SPIDER+ patients
Tidsram: Month 0 to Month 12
Real-time monitoring using the Quantum automat, in %
Month 0 to Month 12
Biofilm formation of S. aureus strains isolated from SPIDER+ lesion sites
Tidsram: Month 0 to Month 12
Growth curves using the Bioflux automat
Month 0 to Month 12
Biofilm formation of S. aureus strains isolated from apparently healthy areas in SPIDER+ patients
Tidsram: Month 0 to Month 12
Growth curves using the Bioflux automat
Month 0 to Month 12
Constitution of a biobank of samples taken by swabbing of lesion sites in SPIDER+ patients
Tidsram: Month 0, baseline
Number of samples
Month 0, baseline

Andra resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Age of patients
Tidsram: Month 0, baseline
The age of patients will be recorded in years
Month 0, baseline
Weight of patients
Tidsram: Month 0, baseline
The weight of patients will be recorded in kilograms
Month 0, baseline
Height of patients
Tidsram: Month 0, baseline
The height of patients will be recorded in centimeters
Month 0, baseline
Sex of patients
Tidsram: Month 0, baseline
Male/Female/Non-binary
Month 0, baseline
Active smoker
Tidsram: Month 0, baseline
YES/NO
Month 0, baseline
Severity and duration of Inflammatory Bowel Disease : Mayo Endoscopic Score
Tidsram: Month 0, baseline
The severity and duration of Inflammatory Bowel Disease will be recorded according to the Mayo Endoscopic Score. The Mayo Endoscopic Score is a 0 to 4 grading system (scored 0 to 3) used during a colonoscopy to assess the severity of inflammation in patients with ulcerative colitis based on the most involved area of the colon.
Month 0, baseline
The severity and duration of Inflammatory Bowel Disease according to the Harvey-Bradshaw Score
Tidsram: Month 0, baseline

The severity and duration of Inflammatory Bowel Disease will be recorded according to the Harvey-Bradshaw Score. The Harvey-Bradshaw Index (HBI) is a simplified clinical questionnaire used to quantify the severity and monitor the progression of Crohn's disease. Developed in 1980, it serves as a streamlined alternative to the more complex Crohn's Disease Activity Index, relying primarily on symptoms from the previous day as follows:

General Well-Being:0: Very well1, Slightly below par 2, Poor 3, Very poor 4, Terrible Abdominal Pain:0, None1, Mild 2, Moderate 3, Severe Liquid Stools,1 point per bowel movement (Recorded for the previous day). Abdominal Mass:0, None1, Dubious 2, Definite 3, Definite and tender Complications (Score 1 point for each present condition). Joint pain (Arthralgia), Eye inflammation (Uveitis) Red, tender skin nodules (Erythema nodosum), Mouth ulcers (Aphthous ulcers), Necrotic skin ulcers (Pyoderma gangrenosum) Anal fissure, Fistula, Abscess.
Month 0, baseline
Montreal Inflammatory Bowel Disease Classification
Tidsram: Month 0, baseline
The Montreal Inflammatory Bowel Disease Classification is the gold-standard for classifying Crohn's Disease and Ulcerative Colitis. Crohn's disease has 3 distinct variables (Age, Location, and Behavior):Age at Diagnosis (A):A1: ≤ 16 years, A2: 17 to 40 years, A3: > 40 years. Location (L):L1: Ileal (terminal ileum)L2: Colonic (large intestine)L3: Ileocolonic (both small and large intestine)L4: Upper Gastrointestinal tract (can coexist with L1-L3). Behavior (B):B1: Non-stricturing, non-penetrating (inflammatory phase)B2: Stricturing (narrowing of the bowel) B3: Penetrating (fistulae or abscesses)p: Perianal disease. Ulcerative Colitis is classified by the extent of anatomical involvement and severity:E1 (Ulcerative Proctitis): Limited strictly to the rectum.E2 (Left-sided UC): Extends up to the splenic flexure.E3 (Extensive/Pancolitis): Extends proximally past the splenic flexure, involving the whole colon.S0-S3 (Severity): Clinical remission (S0) to severe clinical attacks (S3).
Month 0, baseline
Treatments prior to initiation of anti-TNFα therapy, duration of anti-TNFα therapy and concomitant treatments.
Tidsram: Month 0, baseline
All treatments prior to initiation of anti-TNFα therapy, the duration of anti-TNFα therapy and concomitant treatments will be recorded.
Month 0, baseline

Samarbetspartners och utredare

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Sponsor

Centre Hospitalier Universitaire de Nīmes

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

1 september 2026

Primärt slutförande (Beräknad)

1 september 2028

Avslutad studie (Beräknad)

1 september 2029

Studieregistreringsdatum

Först inskickad

26 augusti 2026

Först inskickad som uppfyllde QC-kriterierna

4 september 2026

Första postat (Faktisk)

10 september 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

10 september 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

4 september 2026

Senast verifierad

1 augusti 2026

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • AOI2024/2025/CDR-01

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