Surface/equipment

Number of alleles detected

Before decontamination

After decontamination

RFU≥100

RFU≥50

RFU≥100

RFU≥50

Drawer of laboratory cupboard (outside surface)

3

6

0

0

Laboratory bench

7

9

0

1

On/off button laminar flow cabinet

6

6

0

0

Handle laboratory freezer

8

13

0

0

Handle laboratory fridge

6

8

0

3

Rack for tubes (empty)

10

11

0

0

Vortex

2

9

0

1

Electronic pipette

3

5

0

0

Table 3: Numbers of alleles detected on surfaces and equipment before and after decontamination with DNA ZAP (Applied Biosystems)