Table 2. Results of testing for SARS-CoV-2 in general ward, Huoshenshan Hospital, Wuhan, China, 2020*.
| Area, sample |
Intense positive/weak positive/negative† |
Rate of positivity, % |
Average virus concentration‡ |
|---|---|---|---|
| Contaminated area | |||
| Isolation ward | |||
| Floor | 1/1/11 | 15.4 | 1.6 × 104 |
| Doorknob | 0/1/11 | 8.3 | 6.5 × 102 |
| Air outlet | 0/1/11 | 8.3 | 3.4 × 103 |
| Sickbed handrail | 0/0/12 | 0 | ND |
| Patient mask | 1/1/8 | 20 | 9.2 × 103 |
| Indoor air (sampling site 1 in Figure 2, panel C) | 0/2/9 | 18.2 | 0.68 |
| Indoor air (sampling site 2 in Figure 2, panel C) | 0/0/5 | 0 | ND |
| Patient corridor | |||
| Floor | 0/0/10 | 0 | ND |
| Computer mouse or keyboard | 0/1/4 | 20 | 3.9 × 103 |
| Trash can | 0/0/8 | 0 | ND |
| Indoor air | 0/0/4 | 0 | ND |
| PPE | |||
| Face shield of medical staff | 0/0/3 | 0 | ND |
| Sleeve cuff of medical staff | 0/0/3 | 0 | ND |
| Glove of medical staff | 0/0/3 | 0 | ND |
| Shoe sole of medical staff | 0/0/3 | 0 | ND |
| Subtotal |
2/7/105 |
7.9 |
NA |
| Semicontaminated area | |||
| Dressing Room 4 | |||
| Floor | 0/0/5 | 0 | ND |
| Indoor air | 0/0/5 | 0 | ND |
| Doorknob | 0/0/3 | 0 | ND |
| Buffer Room 3 | |||
| Floor | 0/0/5 | 0 | ND |
| Indoor air | 0/0/3 | 0 | ND |
| Doorknob | 0/0/3 | 0 | ND |
| Subtotal |
0/0/24 |
0 |
NA |
| Clean area | |||
| Dressing Rooms 1, 2, 3, and 5 | |||
| Doorknob | 0/0/12 | 0 | ND |
| Floor | 0/0/12 | 0 | ND |
| Indoor air | 0/0/6 | 0 | ND |
| Buffer rooms 1 and 2 | |||
| Doorknob | 0/0/6 | 0 | ND |
| Floor | 0/0/6 | 0 | ND |
| Indoor air | 0/0/4 | 0 | ND |
| Subtotal |
0/0/46 |
0 |
NA |
| Total | 2/7/175 | 4.9 | NA |
*NA, not applicable; ND, not determined; PPE, personal protective equipment; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2. †Intense positive indicates a positive result for both open reading frame 1ab gene and nucleoprotein gene of SARS-CoV-2; weak positive indicates a positive result for only 1 of the genes. ‡The average virus concentration of indoor air expressed as copies/L and of swab samples, as copies/sample.