Sampling is important in respiratory tract infectious disease diagnostics
- The accuracy of rapid tests and especially sensitivity is highly dependent on the quality of sampling and the onset of the symptoms.
- The diagnostic test result is only as good as the quality of the sample!
Sampling procedure for nasopharyngeal swab samples
- Ask the patient blow their nose when possible
- Bend the patient´s head backward.
- Swiftly insert the swab into the nostril. The depth of insertion is around 4-8 cm for children and 8-12 cm for adults.
- Rotate the swab against the nasopharyngeal mucosa and remove the swab.
Sampling procedure for throat swab samples
- Press the tongue down with a spatula or hold it with fingers and a gauze.
- Wipe the swab back and forth across the oropharynx and the tonsils to obtain an adequate sample.
- Ensure that the sample is not contaminated by the normal flora of the mouth by avoiding contact with other surfaces, such as the tongue cheeks.
- Only flocked swabs are recommended for sample collection. Copan flocked swabs have been clinically validated for the mariPOC® test system. The flocked swabs by Medical Wire (MWE) are technically suitable but require further clinical validation.
- Considering the patient size, choose as large swab as possible in order to obtain high quality sample.