Abstract：
:The suitability of indirect impedance to accurately measure microbial growth in real food matrices was investigated. A variety of semi-solid and liquid food products were inoculated with Bacillus cereus, Listeria monocytogenes, Staphylococcus aureus, Lactobacillus plantarum, Pseudomonas aeruginosa, Escherichia coli, Salmonella enteriditis, Candida tropicalis or Zygosaccharomyces rouxii and CO2 production was monitored using a conductimetric (Don Whitely R.A.B.I.T.) system. The majority (80%) of food and microbe combinations produced a detectable growth signal. The linearity of conductance responses in selected food products was investigated and a good correlation (R(2) ≥ 0.84) was observed between inoculum levels and times to detection. Specific growth rate estimations from the data were sufficiently accurate for predictive modeling in some cases. This initial evaluation of the suitability of indirect impedance to generate microbial growth data in complex food matrices indicates significant potential for the technology as an alternative to plating methods.
journal_name
Food Microbioljournal_title
Food microbiologyauthors
Johnson N,Chang Z,Bravo Almeida C,Michel M,Iversen C,Callanan Mdoi
10.1016/j.fm.2014.02.014subject
Has Abstractpub_date
2014-09-01 00:00:00pages
8-13eissn
0740-0020issn
1095-9998pii
S0740-0020(14)00039-2journal_volume
42pub_type
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