Procedures involving liquid media for detection of bacterial contamination in breweries

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dc.contributor.authorVan Vuuren H.J.J.
dc.contributor.authorLouw H.A.
dc.contributor.authorLoos M.A.
dc.contributor.authorMeisel R.
dc.date.accessioned2011-05-15T15:56:34Z
dc.date.available2011-05-15T15:56:34Z
dc.date.issued1977
dc.description.abstractThe liquid equivalent of universal beer agar, designated universal beer liquid medium, and its beer-free equivalent, universal liquid medium (UL), were equally effective in demonstrating bacterial contamination in 120 of 200 samples from different stages of a commercial brewing process. Growth of the contaminants after 3 days was consistently more luxuriant in the UL medium. A yeast-water substrate medium failed to reveal many contaminants detected with UL in 392 samples from three breweries and revealed only a few not detected with UL. The use of UL and a lactose-peptone medium, with microscope examination of the media for bacterial growth, permitted detection of 93% of the known contaminants compared to 87% detected with UL alone; this combination or universal beer liquid medium plus lactose-peptone medium can therefore be recommended for the detection of bacterial contaminants in brewery samples. Bacterial contamination of pitching yeasts appeared to be a particular problem in the breweries investigated.
dc.identifier.citationApplied and Environmental Microbiology
dc.identifier.citation33
dc.identifier.citation2
dc.identifier.issn992240
dc.identifier.urihttp://hdl.handle.net/10019.1/9926
dc.subjectbacterium contamination
dc.subjectbeer
dc.subjectin vitro study
dc.subjectmethodology
dc.subjectmicroorganism
dc.subjectarticle
dc.subjectbacterium
dc.subjectcomparative study
dc.subjectculture medium
dc.subjectisolation and purification
dc.subjectlactose
dc.subjectpeptone
dc.subjectBacteria
dc.subjectBeer
dc.subjectComparative Study
dc.subjectCulture Media
dc.subjectEvaluation Studies
dc.subjectLactose
dc.subjectPeptones
dc.titleProcedures involving liquid media for detection of bacterial contamination in breweries
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