Keofitt W9, User Manual, Page: 9 / 50

KEOFITT W9 USER MANUAL V.4 PAGE 9
Spores Relatively water-poor resting cells surrounded by an impervious cell wall,
which makes them relatively resistant to disinfectants and sterilants. They
are dangerous as they can survive in adverse conditions and re-emerge as
live bacteria at a later stage.
Sporicidal The property of an agent that kills spores.
Steaming The process of using saturated steam under pressure as the sterilising agent.
Sterile State of being free from all living microorganisms. In practice, usually
described as a probability function, e.g., as the probability of any
microorganism surviving sterilisation being one in one million.
Sterilant A few disinfectants will kill spores with prolonged exposure times (3–12
hours); these are called chemical sterilants.
Sterilisation Validated process used to render an item free of all forms of viable
microorganisms. In a sterilisation process, the presence of microorganisms is
expressed in terms of probability. Although this probability can be reduced to
a very low number, it can never be reduced to zero.
Sterility Assurance Level The probability of a viable microorganism being present on an item after
sterilisation. Usually expressed as 10
–n
; a SAL of 10
-6
means <1/1 million
chance that a single viable microorganism is present on a sterilised item.
Tensides A tenside is a surfactant that reduces the surface tension of water and
assures a faster and better contact between the detergent and the soil.
1.2 Quick start
The table below gives you an overview of the relevant chapters to read depending on the operations you
want to perform to obtain the required hygienic level.
Required
hygienic level
4.1 Pr
e-
pr
oduction
tr
eatment
4.2 Chemic
al
cle
aning CIP
4.3 Chemic
al
disinf
ection
4.4 St
eaming
5.1 Chemic
al
CIP 5.2 Chemic
al
disinf
ection
5.3 St
eam
st
erilisation
5.4 Sampling
Cleaning
   
Disinfection
   
Sterilisation
   