Table 3 Overview of swabs included in the microbiome analysis.

From: Determination of nasal and oropharyngeal microbiomes in a multicenter population-based study – findings from Pretest 1 of the German National Cohort

  Nasal swabs collected by certified personnel at the study center Oropharyngeal swabs collected by certified personnel at the study center Nasal swabs collected by study participants at home
Swab type swab1* swab2** swab3*** swab1* swab2** swab3*** swab1* swab2** swab3***
No. of swabs 23 26 25 39 34 37 31 26 17
Total no. of swabs analyzed 74 110 74
  1. 313 samples originating from 258 individuals were analyzed. To avoid possible bias, a subset of analyses was performed on 258 samples comprising only one swab per individual.
  2. *Swab 1 – flocked nylon swab.
  3. **Swab 2 – rayon swab.
  4. ***Swab 3 – polyurethane tipped swab.
  5. Swab 4 (calcium alginate) was excluded because it had proven unsuitable during preanalytical processing (see Results).