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Secondary Bacterial Infections and Nasal Colonization in Scabies and Atopic Dermatitis

10 september 2026 bijgewerkt door: Tunç Ozen, Istanbul Medeniyet University

Microbiological Profile of Secondary Bacterial Infections and Nasal Colonization in Patients With Scabies and Atopic Dermatitis: A Prospective Observational Study

This prospective observational study will evaluate the microbiological profile of secondary bacterial infection and nasal colonization in participants with scabies or atopic dermatitis. Bacteria isolated from impetiginized skin lesions and nasal swabs will be compared, and antimicrobial susceptibility patterns will be assessed. Healthy participants without an inflammatory skin disease or signs of infection will provide nasal swabs as a control group. Patients will be followed on days 7 and 14 to assess clinical response and related clinical measures.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Gedetailleerde beschrijving

Participants with dermatologist-confirmed scabies or atopic dermatitis and active impetiginized skin lesions will undergo clinical assessment and microbiological sampling. A superficial swab will be obtained from the infected skin lesion and a nasal swab will be obtained from the nasal vestibules. Healthy controls will undergo nasal sampling only. Cultures will be evaluated for Staphylococcus aureus, Streptococcus pyogenes, and other bacterial isolates. Antimicrobial susceptibility testing will be performed according to European Committee on Antimicrobial Susceptibility Testing (EUCAST) guidance. Skin and nasal isolates will be compared at the species level and by antimicrobial resistance profile. Clinical data include age, sex, disease duration, comorbidities, recent treatments, itch severity using a 0-10 visual analog scale, and lesion morphology, location, number, and excoriation. Patients will be contacted on days 7 and 14 to assess clinical response, new lesion development, change in itch severity, treatment adherence, and local or systemic adverse events.

Studietype

Observationeel

Inschrijving (Geschat)

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Naam: TEST CONTACT - REPLACE
Telefoonnummer: +90 000 000 0000
E-mail: test-contact@example.com

Studie Locaties

Turkije (Türkiye)
- - Istanbul, Turkije (Türkiye)
    - Test Study Site - Replace

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

Kind
Volwassen
Oudere volwassene

Accepteert gezonde vrijwilligers

Bemonsteringsmethode

Niet-waarschijnlijkheidssteekproef

Studie Bevolking

Participants presenting to a dermatology clinic will include patients with dermatologist-confirmed scabies or atopic dermatitis and active impetiginized skin lesions, as well as healthy controls without inflammatory skin disease or signs of infection.

Beschrijving

Inclusion Criteria:

Scabies group: dermatologist-confirmed scabies and an active impetiginized skin lesion.
Atopic dermatitis group: dermatologist-confirmed atopic dermatitis and an active impetiginized skin lesion.
Healthy control group: no inflammatory skin disease or clinical signs of infection.
Written informed consent (and appropriate parent/guardian permission when applicable).

Exclusion Criteria:

Systemic or topical antibiotic use within the previous 14 days.
Active nasal infection or nasal symptoms.
History of nasal surgery or anatomic nasal deformity.

TEST DRAFT NOTE: The source protocol contains wording that may conflict with inclusion of healthy controls; the final eligibility text must be reconciled with the ethics-approved protocol before release.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

Aantal groepen / cohorten

Cohorten en interventies

Groep / Cohort
Scabies with impetiginized lesions Participants with dermatologist-confirmed scabies and an active impetiginized skin lesion suggestive of secondary bacterial infection.
Atopic dermatitis with impetiginized lesions Participants with dermatologist-confirmed atopic dermatitis and an active impetiginized skin lesion suggestive of secondary bacterial infection.
Healthy controls Participants without an inflammatory skin disease or clinical signs of infection; nasal swab sampling only.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat	Maatregel Beschrijving	Tijdsspanne
Concordance of bacterial species between impetiginized skin lesion and nasal cultures Tijdsspanne: At baseline (enrollment)	Among participants in the scabies and atopic dermatitis groups with paired evaluable skin and nasal cultures, concordance will be defined as isolation of the same bacterial species from both anatomical sites. Species-level agreement will be summarized and evaluated using Cohen's kappa coefficient.	At baseline (enrollment)

Secundaire uitkomstmaten

Uitkomstmaat	Maatregel Beschrijving	Tijdsspanne
Bacterial profile of impetiginized skin lesions Tijdsspanne: At baseline (enrollment)	The number and proportion of lesion cultures yielding Staphylococcus aureus, Streptococcus pyogenes, other bacteria, mixed growth, or no bacterial growth will be summarized.	At baseline (enrollment)
Nasal Staphylococcus aureus carriage across study groups Tijdsspanne: At baseline (enrollment)	The number and proportion of participants with nasal Staphylococcus aureus carriage will be summarized for the scabies, atopic dermatitis, and healthy control groups.	At baseline (enrollment)
Antimicrobial susceptibility and resistance profile of bacterial isolates Tijdsspanne: At baseline (enrollment)	Antimicrobial susceptibility results, including methicillin resistance among Staphylococcus aureus isolates and susceptibility to the antibiotics included in the laboratory panel, will be summarized for skin and nasal isolates.	At baseline (enrollment)
Clinical response at day 14 Tijdsspanne: 14 days after enrollment	Clinical response will be categorized as complete remission, partial response, no change, or worsening. Associations with bacterial species, methicillin resistance, antimicrobial resistance, nasal carriage, and skin-nasal concordance will be explored.	14 days after enrollment
Development of new skin lesions during follow-up Tijdsspanne: Through 14 days after enrollment	The occurrence of new lesions during the 14-day follow-up period will be recorded.	Through 14 days after enrollment

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Istanbul Medeniyet University

Onderzoekers

Hoofdonderzoeker: TEST INVESTIGATOR - REPLACE, TEST AFFILIATION - REPLACE

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

1 oktober 2026

Primaire voltooiing (Geschat)

1 maart 2027

Studie voltooiing (Geschat)

1 maart 2027

Studieregistratiedata

Eerst ingediend

4 september 2026

Eerst ingediend dat voldeed aan de QC-criteria