wheremicrobiologicaltestingis mostuseful..Thistypeof integratedapproach
providesa betterindicationof cleaning efficacy, helpsto providetransparency
and demonstratesa company's concern for effective cleaning.Additionally, it
has the potentialto saveon cleaningcostsby identifyingwhat is, or is not,
effectiveor necessary.
36.4.2 Strategies
Anyoverall policyto ensureclean surfaces (see Fig.36.9)should include
monitoringsurfacecleanliness. Whenand whereto sample needsto be con-
sideredin relation to risk and the potentialfor cross-contamination. It is unfor-
tunatethat in some companies, samplingconcentrateson the centreof largeflat
surfaces, whichare morelikelyto be wellcleaned.Lessattention maybe given
to handcontact surfaces or cracksand crevices wheresoil and latermicro-
organismscan accumulate. Rinses, especially in CIP, in liquidprocessing plants
Fig. 36.9 Ensuringcleansurfaces.Improvingsurfacesamplingand detection of contamination 611