Several biocides commonly used in disinfection processes as antibacter
ial and antifungal agents were tested for activity against MS2 and K c
oliphages. MS2 was resistant to most biocides; only glutaraldehyde (0.
5%) and peracetic acid (1%) achieved a 4-log(10) titer reduction in 20
min. In contrast, K phage was sensitive to most biocides, being resis
tant only to phenol (2%) and chlorhexidine (1%).