Public health investigators are using the PulseNet system to identify cases of illness that may be part of this outbreak. PulseNet, the national subtyping network of public health and food regulatory agency laboratories coordinated by CDC, receives DNA “fingerprints” of Salmonella bacteria obtained through diagnostic testing using pulsed-field gel electrophoresis, or PFGE. Whole genome sequencing, a highly discriminatory subtyping method, was also used to define the outbreak strain. Whole genome sequencing helped clarify which illnesses were related to the outbreak.
The number of ill persons identified in each state is as follows: Connecticut (1), Iowa (1), Tennessee (1), and Texas (1).
Collaborative investigation efforts of state, local, and federal public health and regulatory agencies indicate that almond and peanut butter manufactured by nSpired Natural Foods, Inc. is the likely source of this outbreak. The U.S. Food and Drug Administration (FDA) isolated the same strain of Salmonella Braenderup from environmental samples collected from an nSpired Natural Foods facility during routine inspections in January and July 2014. On August 19, 2014, nSpired Natural Foods, Inc. voluntarily recalled certain lots of almond and peanut butters because of potential contamination with Salmonella. A complete listing of all of the recalled products is available on the FDA website.