An Evaluation of the Role of Temperature on the Safety and Quality of Raw Shellstock Oysters and Bluefish

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dc.contributor.authorLorca, Tatiana A.en
dc.contributor.committeechairPierson, Merle D.en
dc.contributor.committeememberFlick, George J. Jr.en
dc.contributor.committeememberHackney, Cameron Rajen
dc.contributor.departmentFood Science and Technologyen
dc.date.accessioned2014-03-14T20:47:51Zen
dc.date.adate2000-11-16en
dc.date.available2014-03-14T20:47:51Zen
dc.date.issued2000-11-07en
dc.date.rdate2001-11-16en
dc.date.sdate2000-11-14en
dc.description.abstractRaw oyster shellstock was subjected to abuse conditions (7, 13, and 21°C) and sampled over a ten day storage period to gather scientific data to aid in determining whether spoilage occurred in the raw product over time before proliferation of pathogenic flora (Vibrio vulnificus) made the product unsafe. Spoilage was evaluated through pH measurements of a homogenate of the shucked meat and liquor. The olfactory acceptability of the raw oysters was evaluated in concert with the microbial and chemical evaluations. At all storage conditions, halophilic bacteria outgrew V. vulnificus by a minimum of 1 log CFU/g oyster (Colony Forming Units per gram) (p < 0.05). Olfactory acceptability was below 40% when V. vulnificus growth was at its highest (p < 0.05). Refrigerated storage should be considered a CCP for raw shellstock since even moderate temperature control kept V. vulnificus below 10<sup>4</sup> approximately 1-2 Logs below the estimated infective dose for the majority of the population.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-11142000-17030008en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11142000-17030008/en
dc.identifier.urihttp://hdl.handle.net/10919/35694en
dc.publisherVirginia Techen
dc.relation.haspartetd.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectbluefishen
dc.subjectoystersen
dc.subjectMorganellaen
dc.subjectVibrioen
dc.titleAn Evaluation of the Role of Temperature on the Safety and Quality of Raw Shellstock Oysters and Bluefishen
dc.typeThesisen
thesis.degree.disciplineFood Science and Technologyen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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