Table 1 Transformability of released RP4 from NaClO-treated ARB (105 − 106cfu/mL) to chemically competent Escherichia coli DH5α at pH 7.2, 20 °C.

From: Chlorine disinfection promotes the exchange of antibiotic resistance genes across bacterial genera by natural transformation

ARB (with RP4)

Dose (mg/L)

Observed Ct value (mg/L min)

10.59

13.17

23.73

25.83

31.17

39.84

44.65

74.26

E. coli

6.0

+

/a

−

−

−

−

−

−

P. aeruginosa

6.5

+

+

+

+

/a

/a

−

−

S. aberdeen

7.5

+

+

/a

/a

−

−

−

−

E. faecalis

9.0

+

+

+

+

+

+

/a

−

  1. + transformant formed; − no transformant.
  2. P. aeruginosa Pseudomonas aeruginosa; S. aberdeen Salmonella aberdeen; E. faecalis Enterococcus faecalis
  3. aNot detected.
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