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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT03613636
Other study ID # 2016-00148
Secondary ID
Status Completed
Phase
First received
Last updated
Start date May 1, 2016
Est. completion date October 31, 2020

Study information

Verified date February 2024
Source University Children's Hospital, Zurich
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

To investigate the Mycoplasma pneumoniae-specific circulating antibody-secreting cell (ASC) response and Mycoplasma pneumoniae-specific interferon (INF)-γ-secreting T cell response, along with polymerase chain reaction (PCR) and serology, in a cohort of children with community-acquired pneumonia (CAP) and controls.


Recruitment information / eligibility

Status Completed
Enrollment 490
Est. completion date October 31, 2020
Est. primary completion date October 31, 2020
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 3 Years and older
Eligibility Inclusion Criteria: CAP cohort: - Children of age 3 to 18 years; - In- and outpatients; - Clinically diagnosed community-acquired pneumonia (CAP); Healthy control cohort: - Healthy asymptomatic children of age 3 to 18 years undergoing an elective surgical procedure; Family control cohort: - Family members of index CAP patients. Exclusion Criteria: - Hospital-acquired pneumonia; - Immunodeficiencies; - Chronic lung disorders.

Study Design


Intervention

Diagnostic Test:
Enzyme-linked immunospot (ELISpot) assay [Blood]
The ASC ELISpot will be developed based on the improved methods recently described [Nat Protoc 2013;8:1073-87]. This protocol allows rapid (6-8 h) detection of specific ASCs in small volumes (1-2 ml) of blood. M. pneumoniae protein P1 (50 µl/ml) will be used as antigen. The optimal concentration of coating antigen will be assessed in advance in two-fold serial dilutions for clear spot definition. The M. pneumoniae-specific T cell ELISpot will be developed based on methods recently described [Nat Protoc 2009;4:461-9].

Locations

Country Name City State
n/a

Sponsors (1)

Lead Sponsor Collaborator
University Children's Hospital, Zurich

Outcome

Type Measure Description Time frame Safety issue
Primary Change in numbers of M. pneumoniae-specific ASCs and M. pneumoniae-specific INF-?-secreting T cells in blood from inclusion (day 0) to 1-month follow-up (day 28) Enzyme-linked immunospot (ELISpot) assay and flow cytometry At day 0 (inclusion, disease presentation) and at day 28 (follow-up, disease resolution)
Secondary Change in M. pneumoniae DNA levels in respiratory samples from inclusion (day 0) to 1-month follow-up (day 28) PCR At day 0 (inclusion, disease presentation) and at day 28 (follow-up, disease resolution)
Secondary Change in total and M. pneumoniae-specific antibody levels (immunoglobulin (Ig)G, IgM, IgA) from inclusion (day 0) to 1-month follow-up (day 28) Enzyme-linked immunosorbent assay (ELISA) At day 0 (inclusion, disease presentation) and at day 28 (follow-up, disease resolution)
Secondary Outcome of community-acquired pneumonia (CAP) assessed by clinical assessment of body temperature (°C) and respiratory rate (per minute) at 1-month follow-up (day 28) Clinical assessment of body temperature (°C) and respiratory rate (per minute), with worse outcome defined as body temperature more than 38.5°C and respiratory rate according to age more than 40/min for 3 years, more than 34/min for 4-5 years, more than 30/min for 6-12 years, and more than 16/min for 13-18 years. At day 28 (follow-up)
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