Effect of packaging atmosphere on the microbial attributes of pearlspot (etroplus suratensis bloch) stored at 0-2 super(o)C

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dc.contributor.authorRavishankar, C.N.
dc.contributor.authorLalitha, K.V.
dc.contributor.authorJose, L.
dc.contributor.authorManju, S.
dc.contributor.authorGopal, T.K.S.
dc.date.accessioned2013-12-20T08:51:40Z
dc.date.available2013-12-20T08:51:40Z
dc.date.issued2008
dc.description.abstractEffect of packaging atmosphere (air and under different modified atmospheres (MAs), 40% CO sub(2)/60% O sub(2), 50%/50% O sub(2), 60% CO sub(2)/40% O sub(2), 70% CO sub(2)/30% O sub(2) and 40% CO sub(2)/30% O sub(2)/30% N sub(2)) on the microbial and biochemical attributes of fresh pearlspot (Etroplus suratensis Bloch) stored at 0-2 super(o)C was investigated. Trimethylamine nitrogen (TMA-N) and thiobarbituric acid (TBA) values remained lower than the proposed acceptability limits throughout the storage period. Results demonstrated that storage of pearlspot under air and MA 40% CO sub(2)/30% O sub(2)/30% N sub(2) resulted in growth of Enterobacteriaceae, Aeromonas and H sub(2)S-producing bacteria including Shewanella putrefaciens, while all other packaging atmospheres did not allow multiplication of Enterobacteriaceae and Aeromonas within 3 weeks. Aeromonas spp. identified were Aeromonas hydrophila, Aeromonas veronii biovar sobria and A. veronii biovar veronii. Significant reduction (p<0.01) was noticed in Aeromonas population of pearlspot stored under MA 60% CO sub(2)/40% O sub(2) and 70% CO sub(2)/30% O sub(2). A delay of growth of Pseudomonas below 5.0log sub(1) sub(0)cfug super(-) super(1) was observed during the 15th day of storage at 0-2 super(o)C under modified atmosphere packaging (MAP) conditions. Growth of faecal streptococci was significantly inhibited in all the packaging atmospheres at 0-2 super(o)C during the entire storage period. Survival of coagulase positive Staphylococci (<50cfug super(-) super(1)) in low numbers was noticed during storage in all the packaging atmospheres. Clostridium botulinum toxin was not detected. All the packaging atmospheres did not allow multiplication of sulphite-reducing clostridia at 0-2 super(o)C during the entire storage period. Packaging in MA 60% CO sub(2)/40% O sub(2) resulted in the inhibition of growth of Aeromonas and Enterobacteriaceae, and the slowest growth of psychrotrophic bacteria, H sub(2)S-producing bacteria, including Shewanella putrefaciens and Pseudomonas and extended microbiological shelf life to 9-10 days. This study confirms the survival of potentially pathogenic A. hydrophila, A. veronii biovar sobria and A. veronii biovar veronii capable of growth at low temperature in pearlspot stored under MA.en_US
dc.identifier.citationFood Microbiology 2008: 25(3), 518-528en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1030
dc.language.isoenen_US
dc.publisherElsevier Scienceen_US
dc.subjectModified atmosphereen_US
dc.subjectpsychrotrophic pathogensen_US
dc.subjectmicrofloraen_US
dc.titleEffect of packaging atmosphere on the microbial attributes of pearlspot (etroplus suratensis bloch) stored at 0-2 super(o)Cen_US
dc.typeArticleen_US
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