Growth of Salmonella Enteritidis phage type 30 in almond hull and shell slurries and survival in drying almond hulls

Journal of Food Protection
Aaron R Uesugi, Linda J Harris

Abstract

Traceback investigation of a 2000 to 2001 outbreak of salmonellosis associated with consumption of raw almonds led to isolation of the outbreak strain Salmonella enterica serovar Enteritidis phage type (PT) 30 on three geographically linked almond farms. Interviews with these growers revealed that significant rain fell during the 2000 harvest when many almonds were drying on the ground. The objectives of this study were to document weather conditions during the 2000 harvest, determine the potential for growth of Salmonella Enteritidis PT 30 in hull or shell slurries, and evaluate survival of Salmonella Enteritidis PT 30 on wet almond hulls during drying. Dry almond hulls and in-shell kernels wetted for 24 h increased in weight by 250 to 300% and 100%, respectively. Both hull and shell slurries supported rapid growth of Salmonella Enteritidis PT 30 at 24 degrees C; slurries containing hulls also supported growth at 15 degrees C. Maximum Salmonella Enteritidis PT 30 concentrations of 6.2 and 7.8 log CFU/ml were observed at 15 and 24 degrees C, respectively. Salmonella Enteritidis PT 30 grown in wet hulls that were incubated at 24 degrees C survived drying at either 15 or 37 degrees C. Reductions of 1 to 3 log CFU/g of dry hull we...Continue Reading

References

Feb 5, 2005·Journal of Food Protection·S IsaacsUNKNOWN Salmonella Enteritidis PT30 Outbreak Investigation Working Group

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Citations

Sep 7, 2007·Journal of Food Protection·Aaron R UesugiLinda J Harris
Feb 28, 2009·Journal of Applied Microbiology·E Komitopoulou, W Peñaloza
May 5, 2007·Journal of Food Protection·Michelle D DanylukLinda J Harris
Jul 10, 2010·Journal of Food Protection·Larry R Beuchat, David A Mann
Jan 16, 2013·Journal of Food Protection·Rossana Villa-RojasAurelio López-Malo
Sep 10, 2014·Journal of Food Protection·Tyann BlessingtonLinda J Harris
Dec 12, 2007·Journal of Applied Microbiology·M D DanylukL J Harris
Jun 5, 2008·Journal of Food Protection·Maria T BrandlTara H McHugh
Mar 11, 2008·Journal of Food Protection·Michelle D DanylukLinda J Harris
Nov 7, 2012·Journal of Food Protection·Larry R BeuchatWalid Q Alali
Apr 18, 2017·Journal of Food Protection·Sofia M Santillana FarakosSusanne E Keller
May 18, 2006·Annual Review of Phytopathology·Maria T Brandl
Jun 1, 2018·International Journal of Environmental Research and Public Health·Lingyu FengMary Anne Amalaradjou
Jul 10, 2010·Journal of Food Protection·Wen-Xian DuLinda J Harris
Dec 6, 2019·Journal of Food Protection·Balasubrahmanyam KottapalliDonald W Schaffner
Jun 4, 2017·Food Microbiology·Jonathan D RossbachFrancisco Diez-Gonzalez
Apr 28, 2018·Microbiology Spectrum·Pardeepinder K Brar, Michelle D Danyluk
Mar 20, 2019·Food Research International·F S PrestesM S Nascimento
Apr 18, 2009·Current Opinion in Biotechnology·Anita C WrightW Steve Otwell

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