Abstract
Fresh and frozen berries are popular foods. When berries are picked for fresh consumption, they are usually packed directly without washing because they are highly perishable. There is typically no “kill step” that would eliminate pathogens on fresh or frozen berries. Foodborne illness outbreaks have been associated with the consumption of fresh or frozen berries that were contaminated with pathogenic viruses, parasites, or bacteria. Contamination can occur before or during harvest or during final preparation. This 11-page fact sheet was written by Mary Palumbo, Linda J. Harris, and Michelle D. Danyluk, and published by the UF Department of Food Science and Human Nutrition, November 2013.
References
Bohaychuk, V. M., R. W. Bradbury, R. Dimock, M. Fehr, G. E. Gensler, R. K. King, R. Rieve, and P. R. Barrios. 2009. A microbiological survey of selected Alberta-grown fresh produce from farmers' markets in Alberta, Canada. J. Food Prot. 72 (2): 415-420. https://doi.org/10.4315/0362-028X-72.2.415
Bourquin, L. 2012. Strawberries implicated in massive German norovirus outbreak. Michigan State University Food Safety. Accessed April 2013. http://michiganstateuniversityfoodsafety.wordpress.com/2012/10/07/strawberries-implicated-in-massive-german-norovirus-outbreak/.
Butot, S., T. Putallaz, and G. Sanchez. 2008. Effects of sanitation, freezing and frozen storage on enteric viruses in berries and herbs. Int. J. Food Microbiol. 126 (1-2): 30-35. https://doi.org/10.1016/j.ijfoodmicro.2008.04.033
Calder, L., G. Simmons, C. Thornley, P. Taylor, K. Pritchard, G. Greening, and J. Bishop. 2003. An outbreak of hepatitis A associated with consumption of raw blueberries. Epidemiol. Infect. 131 (1): 745-751. https://doi.org/10.1017/S0950268803008586
Centers for Disease Control and Prevention (CDC). 1996. Update: Outbreaks of Cyclospora cayetanensis infection-United States and Canada, 1996. MMWR Weekly 45 (28): 611-612. http://www.cdc.gov/mmwr/preview/mmwrhtml/00043133.htm.
Centers for Disease Control and Prevention (CDC). 1997a. Hepatitis A associated with consumption of frozen strawberries-Michigan, March 1997. MMWR Weekly 46 (13): 288, 295. http://www.cdc.gov/mmwr/preview/mmwrhtml/00047129.htm.
Centers for Disease Control and Prevention (CDC). 1997b. Update: Outbreaks of cyclosporiasis-United States, 1997. MMWR Weekly 46 (21): 461-462. http://www.cdc.gov/mmwr/preview/mmwrhtml/00047716.htm.
Centers for Disease Control and Prevention (CDC). 1997c. Outbreak of cyclosporiasis-Northern Virginia-Washington, D.C.-Baltimore, Maryland, Metropolitan Area. MMWR Weekly 46 (30): 689-691. http://www.cdc.gov/mmwr/preview/mmwrhtml/00048551.htm.
Centers for Disease Control and Prevention (CDC). 1998. Outbreak of cyclosporiasis-Ontario, Canada, May 1998. MMWR Weekly 47 (38): 806-809. http://www.cdc.gov/mmwr/preview/mmwrhtml/00055016.htm.
Centers for Disease Control and Prevention (CDC). 2013. Foodborne Outbreak Online Database [CDC FOOD]. Accessed January 2013. http://wwwn.cdc.gov/foodborneoutbreaks/Default.aspx.
Flessa, S., D. M. Lusk, and L. J. Harris. 2005. Survival of Listeria monocytogenes on fresh and frozen strawberries. Int. J. Food Microbiol. 101 (3): 255-262. https://doi.org/10.1016/j.ijfoodmicro.2004.11.010
Han, Y., R. H. Linton, and P. E. Nelson. 2004. Effects of recovery, plating, and inoculation methods on quantification of Escherichia coli O157:H7 and Listeria monocytogenes from strawberries. J. Food Prot. 67 (11): 2436-2442. https://doi.org/10.4315/0362-028X-67.11.2436
Herwaldt, B. L., and M. J. Beach. 1999. The return of Cyclospora in 1997: another outbreak of cyclosporiasis in North America associated with imported raspberries. Cyclospora Working Group. Ann. Intern. Med. 130 (3): 210-220. https://doi.org/10.7326/0003-4819-130-3-199902020-00006
Ho, A. Y., A. S. Lopez, M. G. Eberhard, R. Levenson, B. S. Finkel, A. J. da Silva, J. M. Roberts, P. A. Orlandi, C. C. Johnson, and B. L. Herwaldt. 2002. Outbreak of cyclosporiasis associated with imported raspberries, Philadelphia, Pennsylvania, 2000. Emerg. Infect. Dis. 8 (8): 783-788. https://doi.org/10.3201/eid0808.020012
Hutin, Y. J. F., V. Pool, E. H. Cramer, O. V. Nainan, J. Weth, I. T. Williams, S. T. Goldstein, K. F. Gensheimer, B. P. Bell, C. N. Shapiro, M. J. Alter, and H. S. Margolis. 1999. A multistate, foodborne outbreak of hepatitis A. New Eng. J. Med. 340 (8): 595-602. https://doi.org/10.1056/NEJM199902253400802
Kniel, K. E., D. S. Lindsay, S. S. Sumner, C. R. Hackney, M. D. Pierson, and J. P. Dubey. 2002. Examination of attachment and survival of Toxoplasma gondii oocysts on raspberries and blueberries. J. Parasitol. 88 (4): 790-793. https://doi.org/10.1645/0022-3395(2002)088[0790:EOAASO]2.0.CO;2
Knudsen, D. M., S. A. Yamamoto, and L. J. Harris. 2001. Survival of Salmonella spp. and Escherichia coli O157:H7 on fresh and frozen strawberries. J. Food Prot. 64 (10): 1483-1488. https://doi.org/10.4315/0362-028X-64.10.1483
Kurdziel, A. S., N. Wilkinson, S. Langton, and N. Cook. 2001. Survival of poliovirus on soft fruit and salad vegetables. J. Food Prot. 64 (5): 706-709. https://doi.org/10.4315/0362-028X-64.5.706
Laidler, M. R., M. Tourdjman, G. L. Buser, T. Hostetler, K. K. Repp, R. Leman, M. Samadpour, and W. E. Keene. 2013. Escherichia coli O157:H7 infections associated with consumption of locally grown strawberries contaminated by deer. Clin. Infect. Dis. 57 (8): 1129-1134. https://doi.org/10.1093/cid/cit468
Lee, M. B., and E. H. Lee. 2001. Coccidial contamination of raspberries: mock contamination with Eimeria acervulina as a model for decontamination treatment studies. J. Food Prot. 64 (11): 1854-1857. https://doi.org/10.4315/0362-028X-64.11.1854
Luna, R. E., and R. Mody. 2010. Non-O157 Shiga toxin-producing E. coli (STEC) outbreaks, United States. CDC Memo to Record. Accessed April 2013. http://blogs.cdc.gov/publichealthmatters/files/2010/05/nono157stec_obs_052110.pdf.
Marler-Clark, LLP. 2013. Foodborne Illness Outbreak Database. http://outbreakdatabase.com Accessed April 2013.
Mattison, K., K. Karthikeyan, M. Abebe, N. Malik, S. A. Sattar, J. M. Farber, and S. Bidawid. 2007. Survival of calicivirus in foods and on surfaces: experiments with feline calicivirus as a surrogate for norovirus. J. Food Prot. 70 (2): 500-503. https://doi.org/10.4315/0362-028X-70.2.500
Mukherjee, A., D. Speh, A. T. Jones, K. M. Buesing, and F. Diez-Gonzalez. 2006. Longitudinal microbiological survey of fresh produce grown by farmers in the upper Midwest. J. Food Prot. 69 (8): 1928-1936. https://doi.org/10.4315/0362-028X-69.8.1928
Murrow, L. B., P. Blake, and L. Kreckman. 2002. Outbreak of cyclosporiasis in Fulton County, Georgia. Georgia Epidemiol. Rep. 18 (1): 1-2.
Niu, M.T., L. B. Polish, B. H. Robertson, B. K. Kanna, B. A. Woodruff, C. N. Shapiro, M. A. Miller, J. D. Smith, J. K. Gedrose, M. J. Alter, and H. S. Margolis. 1992. Multistate outbreak of hepatitis A associated with frozen strawberries. J. Infect. Dis. 166 (3): 518-524. https://doi.org/10.1093/infdis/166.3.518
Nordic outbreak investigation team. 2013. Joint analysis by the Nordic countries of a hepatitis A outbreak, October 2012 to June 2013: frozen strawberries suspected. Euro Surveill. 18 (27) pii: 20520. https://doi.org/10.2807/1560-7917.ES2013.18.27.20520
Oregon Public Health. 2011. Fresh strawberries from Washington County farm implicated in E. coli O157 outbreak in NW Oregon. Accessed September 2013. http://www.fda.gov/Safety/Recalls/ArchiveRecalls/2011/ucm267667.htm.
Palumbo, M., L. J. Harris, and M. D. Danyluk. 2013. Outbreaks of foodborne illness associated with common berries, 1983 through May 2013. Gainesville: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/fs232. https://doi.org/10.32473/edis-fs232-2013
Ramsay, C. N., and P. A. Upton. 1989. Hepatitis A and frozen raspberries. Lancet 1 (8628): 43-44. https://doi.org/10.1016/S0140-6736(89)91698-X
Reid, T. M. S., and H. G. Robinson. 1987. Frozen raspberries and hepatitis A. Epidemiol. Infect. 98 (1): 109-112. https://doi.org/10.1017/S095026880006177X
Robertson, L. J., and B. Gjerde. 2001. Occurrence of parasites on fruits and vegetables in Norway. J. Food Prot. 64 (11): 1793-1798. https://doi.org/10.4315/0362-028X-64.11.1793
Stals, A., L. Baert, V. Jasson, E. Van Coillie, and M. Uyttendaele. 2011. Screening of fruit products for norovirus and the difficulty of interpreting positive PCR results. J. Food Prot. 74 (3): 425-431. https://doi.org/10.4315/0362-028X.JFP-10-209
Terry, L. 2011. Oregon confirms deer droppings caused E. coli outbreak tied to strawberries. The Oregonian. Accessed September 2013. http://www.oregonlive.com/washingtoncounty/index.ssf/2011/08/oregon_confirms_deer_droppings.html.
Verhaelen, K., M. Bouwknegt, F. Lodder-Verschoor, S. A. Rutjes, and A. M. de Roda Husman. 2012. Persistence of human norovirus GII.4 and GI.4, murine norovirus, and human adenovirus on soft berries as compared with PBS at commonly applied storage conditions. Int. J. Food Microbiol. 160 (2): 137-144. https://doi.org/10.1016/j.ijfoodmicro.2012.10.008
Yu, K., M. C. Newman, D. D. Archbold, and T. R. Hamilton-Kemp. 2001. Survival of Escherichia coli O157:H7 on strawberry fruit and reduction of the pathogen population by chemical agents. J. Food Prot. 64 (9): 1334-1340 https://doi.org/10.4315/0362-028X-64.9.1334