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An oropharyngeal (OP) swab is a sterile swab with a synthetic tip on a thin plastic or wire shaft, used by a trained healthcare provider to collect a specimen from the back of the throat for laboratory testing. This page describes products and general use; it is not medical advice.
Who uses it: clinic and laboratory staff who stock collection supplies, buyers who need to tell swab types apart, and students learning specimen-collection products. This page covers the product and its materials, not the collection technique.
What an oropharyngeal swab is
An OP swab is a single-use specimen collection swab intended for the oropharynx, the part of the throat behind the mouth. CDC guidance on upper respiratory specimens says sterile swabs should be used, and describes OP specimen collection as performed by a trained healthcare provider only (CDC, page dated October 29, 2024; checked 2026-10-30).
How it is built: tip and shaft materials
CDC states: “Use only synthetic fiber swabs with thin plastic or wire shafts.” It also says not to use calcium alginate swabs or swabs with wooden shafts, as they may contain substances that inactivate some viruses and may inhibit molecular tests. CDC lists individually wrapped swabs as preferred when possible.
A manufacturer example shows what this looks like in a product. Medline’s datasheet for its oropharyngeal specimen collection swab (item MD300235) describes a flocked nylon swab head on an ABS (acrylonitrile butadiene styrene) shaft, sterile and individually wrapped. Medline states that its flocked swabs collect more specimen and release the entire sample more rapidly; that is the manufacturer’s own claim (datasheet checked 2026-10-30).
Swab types by collection site
The names refer to where the specimen is taken. The product requirements below come from CDC’s specimen guidance; CDC does not rank mid-turbinate against anterior nasal swabs.
| Swab type | Who may collect it (CDC) | What CDC says about the swab or specimen |
|---|---|---|
| Oropharyngeal (OP) | Trained healthcare provider only; not appropriate for self-collection | An acceptable specimen type; sterile swab, synthetic fiber tip, thin plastic or wire shaft |
| Nasopharyngeal (NP) | Trained healthcare provider only; not appropriate for self-collection | Sterile swab, synthetic fiber tip, thin plastic or wire shaft |
| Nasal mid-turbinate | Healthcare provider, or the patient after reviewing the collection instructions | Use a tapered swab |
| Anterior nasal | Healthcare provider, or the patient after reviewing the collection instructions | Sterile swab for upper respiratory specimens; CDC excludes calcium alginate swabs and wooden shafts for specimen collection generally |
Oropharyngeal swab vs nasopharyngeal swab
Both are provider-collected and neither is appropriate for self-collection. The two products differ in intended site: Medline lists separate catalogue items for its oropharyngeal (MD300235) and nasopharyngeal (MD300245) swabs, both sterile and individually wrapped. Which specimen type a laboratory accepts is set by the laboratory, so the laboratory’s test directory is the reference.
Nasal swab, anterior nasal swab and mid-turbinate swab
“Nasal swab” is a general phrase. CDC separates anterior nasal and mid-turbinate collection, and both can be done by a provider or by the patient after reviewing the instructions. For mid-turbinate collection CDC specifies a tapered swab.
Nasopharyngeal swab material
The material rules above apply across these swab types: a synthetic fiber tip on a thin plastic or wire shaft, with calcium alginate and wooden shafts excluded. Medline’s datasheet covers its nasopharyngeal and oropharyngeal swabs together, with the same flocked nylon head and ABS shaft description.
How to choose
Criteria stated by CDC and the kit manufacturer:
- Confirm with the testing laboratory which specimen types it accepts. CDC advises checking the laboratory’s test directory.
- Use a sterile swab with a synthetic fiber tip and a thin plastic or wire shaft; avoid calcium alginate and wooden shafts (CDC).
- For mid-turbinate collection use a tapered swab (CDC).
- Follow the assay or kit instructions for use. Swab type is kit-specific: Roche’s guide for the cobas PCR Media Dual Swab Sample Kit (2020) says to discard the flocked swab and use only the woven swab.
Storage and handling basics
Keep swabs in their sterile individual wrapping until use, and follow the instructions for use of the collection kit and the receiving laboratory. For its own kit, Roche states that the tube containing the swab is transported and stored at 2 to 30 C, and that a tube with no swab or two swabs may be rejected. These are kit-specific details, not general rules for every swab.
Common mistakes
- Using a calcium alginate swab or a swab with a wooden shaft, which CDC says can inhibit molecular tests.
- Assuming any swab fits any kit. The Roche kit above uses a woven swab and says to discard the flocked one.
- Using the wrong number of swabs in a transport tube for a kit that specifies one.
- Collecting a specimen type the laboratory does not accept.
FAQ
Is an oropharyngeal swab the same as a throat swab?
An oropharyngeal swab is the product used to collect a throat (oropharyngeal) specimen. CDC describes OP specimens as collected by a trained healthcare provider.
Can an oropharyngeal swab be self-collected?
CDC states that nasopharyngeal and oropharyngeal specimens are not appropriate for self-collection. Mid-turbinate and anterior nasal specimens can be collected by the patient after reviewing the instructions.
What is the swab made of?
CDC requires synthetic fiber tips on thin plastic or wire shafts. One manufacturer example uses a flocked nylon head on an ABS shaft.
What is the difference between an oropharyngeal and a nasopharyngeal swab?
They are named for the site where the specimen is taken, the throat or the upper nasal passage behind the nose. Both are provider-collected under CDC guidance and share the same tip and shaft material requirements.
Related guides
Sources
All sources checked 2026-10-30.
- CDC, “Interim Guidelines for Collecting and Handling of Clinical Specimens for COVID-19 Testing” (page dated October 29, 2024): https://www.cdc.gov/covid/hcp/clinical-care/clinical-specimen-guidelines.html
- Medline Scientific, “Nasopharyngeal & Oropharyngeal Swabs” datasheet (items MD300235 and MD300245): https://medlinescientific.co.uk/wp-content/attachment/file/m/d/MD300235-Medline_Flocked%20Tip%20swabs_Plastic%20Shaft.pdf
- Roche, “Oropharyngeal (Throat) Swab Specimen Collection Guide,” cobas PCR Media Uni/Dual Swab Sample Kit, 2020: https://assets.roche.com/f/173850/x/10684cd59b/clinician-oropharyngeal-collection-guide.pdf
