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The phrase "a second swab of" is correct and usable in written English.
It can be used when referring to taking another sample or test, typically in a medical or laboratory context.
Example: "After the initial test returned inconclusive results, the doctor decided to perform a second swab of the patient's throat."
Alternatives: "another swab of" or "a follow-up swab of".
Exact(1)
For each case of suspected ILI, a study nurse visited the subject, (as far as possible on the same day) and collected a nasal and throat swab sample (comprised of a swab of both nasal cavities and a second swab of the throat) for culture.
Similar(59)
Decolonization was checked by a second swab collection seven days after the beginning of the intervention.
A second swab can be sent to a laboratory for DNA profiling (for an additional fee of $59.95 -- envelope included).
Almost 40% of the original sample that tested negative at admission was discharged at the weekend, without a second swab.
The second swab of duplicate UCHG specimens and remnant swabs were vortexed for 2 min in 1 ml of sample buffer.
In addition, 20 patients will be included in a substudy in which a second-swab sample and half of the tissue sample will be processed using molecular (PCR) techniques for comparison with the conventional plating techniques.
Throat swab specimens are collected within 24 hours for detection of influenza A(H7N9) infection and second swab specimens are collected if symptoms appear.
Women were sent a second vaginal swab for a test-of-cure one month following treatment.
From all patients and controls, throat and rectal swab samples were taken on admission or at the community visit and a second set of swab samples was taken ten to fourteen days later.
A sterile swab moistened with sterile saline was rotated over the surface of both sides of mobile phones; second swab was rubbed over the entire ventral surface of the dominant hand (including ventral surfaces of the thumb and the fingers) of HCW's.
Throat swabs were collected by rubbing a second sterile swab against the tonsillar fossa.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com