Chosen concentrations in the quantitative suspension test
(0.25e2.0%) were based on recommendations for similar
commercially available disinfectants (DVG, 2012). The recommended
concentrations are based on their bactericidal and fungicidal
effectiveness. Most commonly peracetic acid based
disinfectants like PES 15/23 are therefore used in concentrations up
to 2.0%. These concentrations are bactericidal and fungicidal but not
always sporicidal. In this study it was demonstrated that these
concentrations are effective in a suspension test against spores of
DSM 4384 or DSM 318, if a suitable exposure time is guaranteed
(60 min). Spores of DSM 4312 (emetic type) at temperatures lower
than 20 C or spores of DSM 4313 (diarrheal type) in contrast survived
concentrations between 0.25 and 2.0%. In addition it is worth
pointing out that spores in a suspension test are more susceptible
to disinfectants than spores that are dry and adhered to surfaces
(Andre et al., 2011).