Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
This study aims to validate dried blood spots (DBS) for SARS-CoV-2 (Severe Acute Respiratory Syndrome 2) antibody detection in elderly individuals.
In the current SARS-CoV-2 pandemic, testing for SARS-CoV-2 specific antibodies is paramount to monitor immune responses in post-authorization vaccination and sero-epidemiology studies. However, large scale and iterative serological testing by venipuncture in older persons can be challenging. Capillary blood sampled using a finger prick and collected on protein saver cards, i.e., dried blood spots (DBS), has already proven to be a promising alternative. However, elderly persons have a reduced cutaneous microvasculature, which may affect DBS-based antibody testing. Therefore, we aimed to evaluate the performance of DBS for the detection of SARS-CoV-2 antibodies in nursing homes residents. We collected venous blood and paired Whatman and EUROIMMUN DBS from nursing home residents, and from staff as a reference population. Venous blood samples were analyzed for the presence of SARS-CoV-2 IgG antibodies using the Abbot chemiluminescent microparticle immunoassay (CMIA). DBS were analyzed by the EUROIMMUN enzyme-linked immuno sorbent assay (ELISA) for SARS-CoV-2 IgG antibodies.
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Nursing home residents/staff members | Experimental | Matched venous blood/dried blood spots collection in a single arm. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Dried blood spot and venous blood collection | Diagnostic Test | A paired venous blood and capillary blood sample (dried blood spot) were collected in every participant for validation purpose. Venous blood samples were analyzed using a chemiluminescent microparticle immunoassay ( the Architect i2000sr Plus system, Abbott), as a reference. Dried blood spots (EUROIMMUN, PerkinElmer Health Sciences Inc., Lübeck, Germany) or (Whatman™, GE Healthcare Sciences, Cardiff, UK) were analyzed by means of a SARS-CoV-2 IgG ELISA (EUROIMMUN, PerkinElmer Health Sciences Inc., Lübeck, Germany). |
| Measure | Description | Time Frame |
|---|---|---|
| Sensitivity and specificity of DBS for SARS-CoV-2 antibody detection | Sensitivity and specificity analysis | baseline (single timepoint) |
| Optimization of the cut-off for seropositivity. | Optimization of the manufacturer recommended cut-off for seropositivity in DBS. | baseline (single timepoint) |
Not provided
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Name | Affiliation | Role |
|---|---|---|
| Piet Cools | University Ghent | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Ghent University | Ghent | Oost-Vlaanderen | 9000 | Belgium |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| ID | Term |
|---|---|
| D000086382 | COVID-19 |
| ID | Term |
|---|---|
| D011024 | Pneumonia, Viral |
| D011014 | Pneumonia |
| D012141 | Respiratory Tract Infections |
| D007239 | Infections |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
|
| D014777 |
| Virus Diseases |
| D018352 | Coronavirus Infections |
| D003333 | Coronaviridae Infections |
| D030341 | Nidovirales Infections |
| D012327 | RNA Virus Infections |
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |