Table 2. Virus titres, determined by qPCR in organs and swabs of necropsied minks, SARS-CoV-2 outbreak on two mink farms, the Netherlands, April 2020 (n = 36).
| Animal number | Conchae | Lung | Spleen | Liver | Distal large intestines | Throat swab | Rectal swab | |
|---|---|---|---|---|---|---|---|---|
| Farm NB1 | 2 | 8,25 | 4,54 | Not detected | Not detected | 4,22 | 6,87 | 3,30 |
| 13 | 9,16 | 5,17 | Not detected | Not detected | 3,56 | 6,81 | 3,01 | |
| 14 | 8,08 | 3,83 | Not detected | Not detected | Not detected | 7,04 | 3,95 | |
| 16 | 7,08 | 3,90 | Not detected | Not detected | 4,97 | 6,47 | 4,47 | |
| Farm NB2 | 2 | 8,19 | 5,77 | Not detected | Not detected | Not detected | 8,03 | 2,58 |
| 8 | 8,55 | 5,55 | Not detected | 3,45 | Not detected | 7,30 | 3,84 | |
| 7 | 8,46 | 5,98 | Not detected | Not detected | Not detected | 6,69 | 5,42 |
SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.
Titres were calculated based on a calibration curve of a virus stock with a known infectious virus titre and are expressed as log10 (median tissue culture infectious dose (TCID50)/g of tissue (organ material) or log10 TCID50/mL of swab material (swabs were always submerged in 2 mL of cell culture medium).