Table 1 Aggregated published data for the detection of pathogenic viruses in freshwater environments.

From: Enhanced detection of viruses for improved water safety

Region

Water source

Virus

Volume collected and processed (L)

Sample type

% Positive (%)

Maximum gene copies L-1

Total gene copies detected

Virus concentration method

References

India

Freshwater Lake

SARS-CoV-2

1

Grab

75

9.9 × 104

9.9 × 104

Ultrafiltration

55

Germany

Freshwater Lake

Avian INF

10

Grab

69

N/A

N/A

Ultrafiltration

53

Asia

Freshwater Lake

NV

10

Composite

75

4.5 × 103

4.5 × 104

Ultrafiltration

46

AdV

60

5.4 × 103

5.4 × 104

Asia

Freshwater River

NV GI

1

Grab

13

6.6 × 104

6.6 × 104

Adsorption-elution

57

NV GII

2

6.8 × 102

6.8 × 102

AdV

39

3.4 × 104

3.4 × 104

Sapovirus

5

1.6 × 103

1.6 × 103

Polyomavirus

2

5.0 × 102

5.0 × 102

Torque teno virus

3

1.8 × 103

1.8 × 103

Alberta, Canada

Freshwater River

NV

20

Grab

75

4.2 × 100*

8.4 × 101

Adsorption-elution

45*

RV

100

4.5 × 100*

9.0 × 101

Sapovirus

75

4.3 × 100*

8.6 × 101

Astrovirus

92

3.8 × 100*

7.6 × 101

EnV

58

2.6 × 100*

5.2 × 101

AdV

92

4.4 × 100*

8.8 × 101

Polyomavirus

83

2.9 × 100*

5.8 × 101

Mexico

Groundwater

SARS-CoV-2

0.125

Grab

44

3.8 × 104

4.8 × 103

None

56

Minnesota, USA

Groundwater

AdV

140-1783

Grab

2.50

6.4 × 102

1.1 × 106

Ultrafiltration

51

EnV

0.90

2.3 × 100

4.1 × 103

NV

0.50

2.2 × 102

3.9 × 105

RV

1.50

2.3 × 102

4.1 × 105

Alberta, Canada

Groundwater

AdV

500

Grab

3.00

8.6 × 101

4.3 × 104

Adsorption-elution

58

NV

< 1

N/A

 < 60

RV

3.00

2.2 × 101

1.1 × 104

Polyomavirus

< 1

6.8 × 101

3.4 × 104

Reovirus

1.00

3.4 × 101

1.7 × 104

  1. *Data is presented in terms of median concentration, and only one of six rivers from the study is presented.