Table 1. Results of testing for SARS-CoV-2 in intensive care unit, Huoshenshan Hospital, Wuhan, China, 2020*.
| Area, sample |
Intense positive/weak positive/negative† |
Rate of positivity, % |
Average virus concentration‡ |
|---|---|---|---|
| Contaminated area | |||
| Isolation wards | |||
| Floor | 6/1/3 | 70 | 6.6 × 104 |
| Computer mouse | 4/2/2 | 75 | 2.8 × 104 |
| Trash can | 0/3/2 | 60 | 3.4 × 104 |
| Sickbed handrail | 2/4/8 | 42.9 | 4.3 × 104 |
| Patient mask | 1/1/3 | 40 | 3.3 × 103 |
| Air outlet filter | 4/4/4 | 66.7 | 1.5 × 105 |
| Indoor air near the air outlet (sampling site 1 in Figure 2, panel A) | 2/3/9 | 35.7 | 3.8 |
| Indoor air near the patients (sampling site 2 in Figure 2, panel A) | 2/6/10 | 44.4 | 1.4 |
| Indoor air near the doctors’ office area (sampling site 3 in Figure 2, panel A) | 0/1/7 | 12.5 | 0.52 |
| Pharmacy | |||
| Floor | 3/0/0 | 100 | 7.45 × 104 |
| Indoor air | 0/0/5 | 0 | ND |
| PPE | |||
| Face shield of medical staff | 0/0/6 | 0 | ND |
| Sleeve cuff of medical staff | 0/1/5 | 16.7 | 7.1 × 103 |
| Glove of medical staff | 0/1/3 | 25 | 2.9 × 103 |
| Shoe sole of medical staff | 3/0/3 | 50 | 3.2 × 104 |
| Subtotal |
27/27/70 |
43.5 |
NA |
| Semicontaminated area | |||
| Buffer room 1 | |||
| Floor | 0/0/5 | 0 | ND |
| Air outlet filter | 0/0/3 | 0 | ND |
| Indoor air | 0/0/5 | 0 | ND |
| Doorknob | 0/0/3 | 0 | ND |
| Dressing room 4 | |||
| Floor | 0/3/5 | 37.5 | 3.8 × 103 |
| Air outlet filter | 0/0/3 | 0 | ND |
| Indoor air | 0/0/5 | 0 | ND |
| Doorknob | 0/0/4 | 0 | ND |
| Subtotal |
0/3/33 |
8.3 |
NA |
| Clean area | |||
| Dressing rooms 1, 2, and 3 | |||
| Doorknob | 0/0/10 | 0 | ND |
| Floor | 0/0/12 | 0 | ND |
| Indoor air | 0/0/8 | 0 | ND |
| Nurse station | |||
| Doorknob | 0/0/5 | 0 | ND |
| Floor | 0/0/5 | 0 | ND |
| Indoor air | 0/0/5 | 0 | ND |
| Dressing rooms 5 and 6, buffer rooms 2 and 3 | |||
| Doorknob | 0/0/12 | 0 | ND |
| Floor | 0/0/12 | 0 | ND |
| Indoor air | 0/0/12 | 0 | ND |
| Subtotal |
|
|
|
| Total | 27/30/184 | 23.7 | 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.