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Table 2 Facility/Unit-wide and separate PCR tests during the COVID-19 outbreak in the facility

From: Genetic testing and serological screening for SARS-CoV-2 infection in a COVID-19 outbreak in a nursing facility in Japan

 

Positive results of PCR assay for SARS-CoV-2 (%)

   
 

Facility/Unit-wide testinga

 

Separate testingb

 
 

April 1–2

April 13–14

April 23–24

Subtotal

April 1–28

Total

Unit 1

 Residents (n = 30)

6/30 (20.0)

N/A

3/13 (23.1)

9/43 (20.9)

11/24 (45.8)

20/67 (29.9)

 Nursing staff members (n = 14)

2/13 (15.4)

5/10 (50.0)

0/4 (0.0)

7/27 (25.9)

1/3 (33.3)

8/30 (26.7)

Unit 2

 Residents (n = 35)

N/A

N/A

N/A

N/A

0/17 (0.0)

0/17 (0.0)

 Nursing staff members (n = 15)

0/15 (0.0)

0/14 (0.0)

N/A

0/29 (0.0)

1/5 (20.0)

1/34 (2.9)

Unit 3

 Residents (n = 34)

N/A

1/33 (3.0)

0/29 (0.0)

1/62 (1.6)

4/10 (40.0)

5/72 (6.9)

 Nursing staff members (n = 14)

0/14 (0.0)

0/13 (0.0)

0/11 (0.0)

0/38 (0.0)

2/4 (50.0)

2/42 (4.8)

Other staff members (n = 10)

0/10 (0.0)

0/10 (0.0)

N/A

0/20 (0.0)

0/1 (0.0)

0/21 (0.0)

Total

8/82 (9.8)

6/80 (7.5)

3/57 (5.3)

17/219 (7.8)

19/64 (29.7)

36/283 (12.7)c

  1. a Facility/unit-wide PCR testing on April 13–14 and 23–24 was performed for the remaining residents and staff of the unit, excluding PCR-positive
  2. individuals up to each time point
  3. b The timeline of PCR positivity in the separate PCR testing is shown in Fig. 2
  4. c The number of residents and staff with a positive PCR result does not include a case of staff 1 in Unit 1 who was identified as PCR-positive in another hospital on March 31, 2020
  5. COVID-19, coronavirus disease 2019; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; N/A, not available