The Centers for Disease Control and Prevention (CDC) reported last week that the U.S. Food and Drug Administration (FDA) isolated Listeria monocytogenes from mung bean sprouts and sprout irrigation water samples obtained during a routine assignment on August 13, 2014, at Wholesome Soy Products, Inc. Based on this finding, FDA conducted an inspection of the facility from August 12, 2014, through September 3, 2014, and isolated Listeria monocytogenes from 25 environmental swabs obtained during the inspection. FDA also issued a report with 12 inspectional observations, citing the firm for numerous unsanitary conditions and poor equipment maintenance.FDA performed pulsed-field gel electrophoresis (PFGE) and whole genome sequencing (WGS) on the isolates from mung bean sprouts and environmental samples from Wholesome Soy Products, Inc. to further characterize the Listeria isolates. Compared with PFGE, WGS provides a clearer distinction of genetic differences among Listeria isolates (strains that are highly related by WGS are more likely to have a common source).
Public health investigators used PFGE and WGS to identify cases of illness that were caused by highly related strains and therefore possibly related to products made at Wholesome Soy Products, Inc. This included data from PulseNet, the national subtyping network of state and local public health laboratories, CDC, and federal food regulatory laboratories that perform molecular surveillance of foodborne infections.
Whole-genome sequences of Listeria strains isolated from five ill people were found to be highly related to sequences of the Listeria strain isolated from mung bean sprouts produced by Wholesome Soy Products, Inc. These ill people have been reported from two states: Illinois (4) and Michigan (1). They became ill from June through August 2014. All five people were hospitalized, and two deaths were reported. Two of the five people were interviewed, and both reported consuming bean sprouts in the month before becoming ill.
My friends at Barf Blog document at least 55 sprout-associated outbreaks occurring worldwide affecting a total of 15,233 people since 1988. A comprehensive table of sprout-related outbreaks can be found at http://barfblog.com/wp-content/uploads/2014/08/Sprout-associated-outbreaks-8-1-14.xlsx.
Listeria: Marler Clark, The Food Safety Law Firm, is the nation’s leading law firm representing victims of Listeria outbreaks. The Listeria lawyers of Marler Clark have represented thousands of victims of Listeria and other foodborne illness outbreaks and have recovered over $600 million for clients. Marler Clark is the only law firm in the nation with a practice focused exclusively on foodborne illness litigation. Our Listeria lawyers have litigated Listeria cases stemming from outbreaks traced to a variety of foods, such as cantaloupe, cheese, celery and milk.