Table 4 Time-related differences in the levels of bacteria with respect to surface type

 BI^a

4.29 ± 0.22

5.22 ± 0.53

AD < BI = ET

T1< T2

0.388

 ET^b

4.47 ± 0.36

5.31 ± 0.39

 PR^c

4.05 ± 0.44

5.01 ± 0.27

 AD^d

3.96 ± 0.37

4.49 ± 0.59

 BI^a

3.23 ± 0.31

2.82 ± 0.30

AD < BI = ET

PR < ET

T1 > T2

0.905

 ET^b

3.48 ± 0.40

3.14 ± 0.44

 PR^c

2.80 ± 0.28

2.52 ± 0.53

 AD^d

2.57 ± 0.17

2.36 ± 0.63

 BI^a

7.06 ± 0.34

7.99 ± 0.24

AD = PR < BI = ET

T1 < T2

0.104

 ET^b

7.25 ± 0.36

8.11 ± 0.33

 PR^c

6.90 ± 0.48

7.70 ± 0.24

 AD^d

6.87 ± 0.26

7.34 ± 0.42