Table 2

Overview of SARS-CoV-2 RNA in particulate matter 10 and inhalable dust samples collected at a mink farm (NB4) during a more acute phase of SARS-CoV-2 outbreak

DateMeasurementInhalableParticulate matter 10Total suspended particles
Non-detect(s)Positive sample(s): virus concentration (RNA copies/m3)Non-detect(s)Positive sample(s): virus concentration (RNA copies/m3)Non-detect(s)Positive sample(s): virus concentration (RNA copies/m3)
13 May 2020Multiple-day outdoor: spot A onlyNoneA: 7.1×102ANoneNot collectedNot collected
16 May 2020Multiple-day outdoor: spot A onlyNoneA: 3.6×103ANoneNot collectedNot collected
19 May 20206-hour indoor stationary (sampling spots I, II, III, IV, V, VI)I, II, VIII: 6.6×103
IV: 9.8×103
VI: 1.9×104
I, II, III, VIV: 5.5×103
VI: 2.5×103
Not collectedNot collected
8-hour indoor personal (person X and person Y)NoneX: 4.5×104
Y: 4.3×104
NoneX: 2.0×104
Y: 3.0×103
Not collectedNot collected
21 May 2020Multiple-day outdoor: expanded (spot A+ B, C, D)NoneA: 2.6×103NoneA: 1.1×102A, C, DB: 6.9×102
25 May 2020Multiple-day outdoor: expanded (spot A+ B, C, D)A, B, C, DNoneANoneB, DA: 4.5×102
C: 3.1×102
28 May 2020Multiple-day outdoor: expanded (spot A+ B, C, D)A, DNoneNoneA: 1.2×103DA: 4.8×103
B: 1.7×103
C: 2.7×102
  • I, II, III, IV, V, VI: stationary indoor air sampling spots (see online supplemental figure S1 for a map of the layout of the farm and measurement spots.

  • A, B, C, D: stationary outdoor air sampling spots (see online supplemental figure S1 for a map of the layout of the farm and measurement spots).

  • X, personal air sampling of fieldworker X; Y, personal air sampling of fieldworker Y.