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Research Publication: UM-SG-RS-2016-27
Title:
Behavior of Salmonella and Listeria monocytogenes in Raw Yellowfin Tuna during Cold StorageYear:
2016Authors:
Liu, CC; Mou, J; Su, YCSource:
FOODS 5 ( 1 ) : 1 - 9DOI:
10.3390/foods5010016Abstract:
Behavior of Salmonella and Listeria monocytogenes in raw yellowfin tuna during refrigeration and frozen storage were studied. Growth of Salmonella was inhibited in tuna during refrigerated storage, while L. monocytogenes was able to multiply significantly during refrigerated storage. Populations of Salmonella in tuna were reduced by 1 to 2 log after 12 days of storage at 5-7 degrees C, regardless levels of contamination. However, populations of L. monocytogenes Scott A, M0507, and SFL0404 in inoculated tuna (10(4)-10(5) CFU/g) increased by 3.31, 3.56, and 3.98 log CFU/g, respectively, after 12 days of storage at 5-7 degrees C. Similar increases of L. monocytogenes cells were observed in tuna meat with a lower inoculation level (10(2)-10(3) CFU/g). Populations of Salmonella and L. monocytogenes declined gradually in tuna samples over 84 days (12 weeks) of frozen storage at -18 degrees C with Salmonella Newport 6962 being decreased to undetectable level (<10 CFU/g) from an initial level of 10(3) log CFU/g after 42 days of frozen storage. These results demonstrate that tuna meat intended for raw consumption must be handled properly from farm to table to reduce the risks of foodborne illness caused by Salmonella and L. monocytogenes.Open Access:
This article is freely available online. You can use the DOI number to find it through the journal's website or through a search engine.Maryland Sea Grant Topic(s):
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Featured Fellow
Leone Yisrael is a cephalopod-loving scuba diver, cook, and loves to try new activities. She conducts genetic analysis and fieldwork at the Smithsonian Environmental Research Center through the Coastal Disease Ecology Lab.
Featured Research Project
Developing a habitat model for mysids, an important link in Chesapeake Bay food webs
Mysids are important mesozooplankton prey for many species of fish in Chesapeake Bay and are an important link in transferring energy from lower to upper trophic levels. Mysids also serve as biological vectors for benthic-pelagic coupling due to their diel vertical migration and omnivorous prey-switching behavior, which makes mysids important regulators of food web architecture. Despite their central role in coastal food webs, surprisingly little is known about mysid ecology and dynamics in Chesapeake Bay.
