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Int J Food Microbiol

Title:		Sensory characteristics of spoilage and volatile compounds associated with bacteria isolated from cooked and peeled tropical shrimps using SPME-GC-MS analysis
Author(s):		Jaffres E; Lalanne V; Mace S; Cornet J; Cardinal M; Serot T; Dousset X; Joffraud JJ;
Address:		"LUNAM Universite, Oniris, UMR 1014 Secalim, Nantes, F-44307, France"
Journal Title:		Int J Food Microbiol
Year:		2011
Volume:		20110413
Issue:		3
Page Number:		195 - 202
DOI:		10.1016/j.ijfoodmicro.2011.04.008
ISSN/ISBN:		1879-3460 (Electronic) 0168-1605 (Linking)
Abstract:		"The spoilage potential of six bacterial species isolated from cooked and peeled tropical shrimps (Brochothrix thermosphacta, Serratia liquefaciens-like, Carnobacterium maltaromaticum, Carnobacterium divergens, Carnobacterium alterfunditum-like and Vagococcus penaei sp. nov.) was evaluated. The bacteria were inoculated into shrimps, packaged in a modified atmosphere and stored for 27 days at 8 degrees C. Twice a week, microbial growth, as well as chemical and sensory changes, were monitored during the storage period. The bacteria mainly involved in shrimp spoilage were B. thermosphacta, S. liquefaciens-like and C. maltaromaticum whose main characteristic odours were cheese-sour, cabbage-amine and cheese-sour-butter, respectively. The volatile fraction of the inoculated shrimp samples was analysed by solid-phase microextraction (SPME) and gas chromatography coupled to mass spectrometry (GC-MS). This method showed that the characteristic odours were most likely induced by the production of volatile compounds such as 3-methyl-1-butanal, 2,3-butanedione, 2-methyl-1-butanal, 2,3-heptanedione and trimethylamine"
Keywords:		Air Pollutants/analysis/chemistry Animals Bacteria/*growth & development/isolation & purification Brochothrix/growth & development/isolation & purification Carnobacterium/growth & development/isolation & purification Decapoda/*microbiology *Food Microbiol;
Notes:		"MedlineJaffres, Emmanuel Lalanne, Valerie Mace, Sabrina Cornet, Josiane Cardinal, Mireille Serot, Thierry Dousset, Xavier Joffraud, Jean-Jacques eng Research Support, Non-U.S. Gov't Netherlands 2011/05/03 Int J Food Microbiol. 2011 Jun 30; 147(3):195-202. doi: 10.1016/j.ijfoodmicro.2011.04.008. Epub 2011 Apr 13"