In March 2017, the Centers for Disease Control and Prevention (CDC) and several state health departments attributed a multistate outbreak of Shiga toxin-producing Escherichia coli O157:H7 to I.M. Healthy brand SoyNut Butter manufactured by Dixie Dew and sold at retail on online outlets.
Outbreak investigators collected open containers of SoyNut Butter from the homes of sick people, and unopened containers from retail locations. Containers of SoyNut Butter from lots #243162 and 244161 tested positive for E. coli. Whole genome sequencing revealed that the same strain of E. coli was found in clinical isolates from sick people and containers of I.M. Healthy SoyNut Butter. Epidemiologic investigation determined that 32 people ill with this strain of E. coli had been infected by eating or attending a facility that served I.M. Healthy SoyNut Butter. This included residents of Arizona (4), California (5), Florida (2), Illinois (1), Massachusetts (1), Maryland (1), Missouri (1), New Jersey (1), Oregon (11), Virginia (2), Washington (2), and Wisconsin (1).
The damage caused by this outbreak has been considerable. Twelve people were hospitalized due to their infection, and nine developed hemolytic uremic syndrome (HUS). HUS is a debilitating condition caused by E. coli that is commonly characterized by kidney failure, but may also lead to brain damage, seizures, and diabetes. Children less than 10 years of age are particularly at risk for developing HUS.
I.M. Healthy brand SoyNut Butter has been recalled, but given its long shelf life, it may still be in some people’s homes. This product, therefore, may continue to pose a threat to people’s health. Several online retailers continued to sell the recalled product at least well into August 2017.
It is not as if in 2017, contaminated nut butters should not have been an issue for manufacturers, suppliers and retailers.
In November 2006, public health officials detected a substantial increase in reports of Salmonella Tennessee isolates. In February 2007, a multistate, case-control study linked the consumption of either Peter Pan or Great Value Peanut Butter brands with infection. 715 people were sickened with 129 hospitalized. Subsequently the same strain of Salmonella Tennessee was isolated from unopened jars of peanut butter and from environmental samples collected from the processing plant. The product was recalled, and new illness reports declined. Unsanitary conditions at the Sylvester, Georgia, processing plant were known about since 2004. On April 5, 2007, ConAgra announced inadvertent moisture from a leaking roof and sprinkler system could have promoted bacteria growth in the plant. Great Value brand was sold at Walmart stores.
Beginning in November 2008, CDC PulseNet staff noted a small and highly dispersed, multistate cluster of Salmonella Typhimurium isolates. The outbreak consisted of two pulsed field gel electrophoresis (PFGE) defined clusters of illness. The first cluster displayed a unique primary enzyme (XbaI) restriction pattern and an uncommon secondary enzyme (BlnI) pattern. The second cluster had two closely related XbaI patterns that were very similar to the first cluster and a BlnI pattern that was indistinguishable from the first cluster. Illnesses continued to be revealed through April 2009, when the last CDC report on the outbreak was published. A total of 714 were sickened, with 171 hospitalized and at least nine deaths. Peanut butter and peanut butter containing products produced by the Peanut Corporation of America plant in Blakely, Georgia, were implicated. King Nut brand peanut butter was sold to institutional settings. Peanut paste was sold to many food companies for use as an ingredient. Implicated peanut products were sold widely throughout the USA, 23 countries and non-U.S. territories.
On September 22, 2012, the CDC announced a multistate outbreak of Salmonella serotype Bredeney linked to Trader Joe’s Valencia Creamy Salted Peanut Butter. Collaborative efforts by local, state and federal public health and regulatory officials traced the product to Sunland, Inc. a Portales, New Mexico company. Sunland issued a recall of multiple nut butters and products made with nut butters. When the outbreak was declared over, a total of 42 people infected with the outbreak strain of Salmonella serotype Bredeney had been reported by 20 states. Among persons for whom information was available, illness onset dates ranged from June 14, 2012 to September 21, 2012. Ill persons ranged in age from less than 1 year to 79 years, with a median age of 7 years. Sixty-one percent of ill persons were children less than 10 years old. Among 36 persons with available information, 10(28%) patients had been hospitalized. The FDA confirmed that environmental samples collected at the Sunland facility had an DNA fingerprint that was indistinguishable to the DNA fingerprint found in outbreak associated patients.
On August 21, 2014, the CDC announced a multistate outbreak of Salmonella Braenderup involving 6 people residing in Connecticut (1), Iowa (1), New Mexico (1), Tennessee (1), and Texas (2). Almond and peanut butter manufactured by nSpired Natural Foods, Inc. was named as the likely source of this outbreak. The outbreak was declared over on October 16, 2014. Illness onset dates range from January 22, 2014 to May 16, 2014. Among 5 ill persons with available information, one person reported being hospitalized. During inspections at the nSpired Natural Food facility in Ashland, Oregon, between January 2014 and August 2014, the FDA isolated Salmonella Braenderup from environmental samples. A search of the PulseNet database linked ill patients to the environmental isolates taken from the nSpired production plant. On August 19, 2014 nSpired Natural Foods issued a voluntary recall of certain lots of almond and peanut butters because of potential contamination with Salmonella. The recalled brands include Arrowhead Mills, MaraNatha, and specific private label almond and peanut butters.
On December 2, 2015 JEM Raw Chocolate LLC (JEM Raw) of Bend, Oregon announced a recall of its full line of all nut butter spreads due to possible contamination with Salmonella. Health authorities at the FDA, Oregon Health Authority, Oregon Department of Agriculture and the CDC had linked illnesses in 13 persons who consumed nut spreads. Dates of onset ranged from July 18, 2015 to November 22, 2015. Cases were reported from California, Colorado, Georgia, Hawaii, Idaho, Illinois, Maine, North Carolina, New Jersey and Oregon.
Dixie Dew and I.M. Healthly, and the entire supply chain, should have been aware of these outbreaks and taken precautions.
 A 1996 Salmonella Mbandaka outbreak linked to peanut butter sickened at least 15 in Australia – Aust N Z J Public Health 1998 Scheil