Virginia Tech
Survival of Vibro vulnificus and other Vibrios in raw oysters (Crassostrea virginica) during processing in Virginia and cold storage
Abstract
dc:description.abstractThe objective of this research was to determine if Vibrio populations, specifically V. vulnificus were affected in oysters by the processing methods employed in Virginia. This study was conducted between July and September in 1995 and during the month of August of 1996 when water temperature was expected to be high. Oysters were harvested from Virginia and the Gulf coast and shucked and blown by Virginia processors. They were tested for aerobic plate counts incubated at 35-37°C, salt content, pH, total Vibrios and V. vulnificus populations before and after processing. Oysters were stored in crushed ice and maintained an internal temperature of 1°C and tested at 5, 10, and 15 days after processing. Oysters were also stored at -9°C tested every one to two weeks. Procedures described in the Food and Drug Administration’s Bacteriological Analytical Manual for identification of V. vulnificus were followed. V. vulnificus populations were not significantly affected by blowing. V. vulnificus populations decreased in oysters stored at 1°C and -9°C. V. vulnificus levels decreased faster in blown oysters harvested from the Gulf coast. Vibrio populations were not significantly reduced by blowing in oysters that were 1°C. Oysters stored at -9°C showed decreased Vibrio populations. pH and APC showed an inverse relationship in oysters that were 1°C. In oysters stored at -9°C, pH and APC showed a positive correlation. Significance of these correlations varied.
Degree
thesis:*- Name thesis:degree_name
- Master of Science
- Level thesis:degree_level
- masters
- Discipline thesis:degree_discipline
- Food Science and Technology
- Department dc:contributor.department
- Food Science and Technology
- Grantor dc:publisher
- Virginia Tech
- Year dc:date.issued
- 1996
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Ostrander, Vicki C.
Subjects
dc:subject × 7Rights
dc:rights- Statement dc:rights
-
- In Copyright
- Licence dc:rights.uri
- Language dc:language.iso
- en
Identifiers
dc:identifier.*- Dc Identifier Other
- etd-11012008-063712
- OAI identifier oai:identifier
- oai:vtechworks.lib.vt.edu:10919/45423