FDA issued a warning letter to Aspen Hills, the manufacturer of ready-to-eat (RTE) cookie dough that was used in ice cream. Aspen Hills conducted a recall of the product after the FDA audit, and along with that, a number of manufacturers who used their product as an ingredient, also issued recalls, including Blue Bell.
FDA found 4 positive Listeria monocytogenes (LM) samples. They appear to be zone 2 and 3 samples. Interesting is that we see that the zone 3 samples - wheels and ladders - are typical types of samples that scream Listeria is on the move in the facility. From the report ((b)(4) redacted text):
- On the second stair/rung of the ladder well leading to the elevated control room. This ladder is adjacent to the (b)(4) used on the cookie dough (b)(4).
- On the wheels of the pallet jack used to move food products within the production room. The pallet jack was located in the (b)(4) of the production room adjacent to the (b)(4) at the time of sampling.
- On the basket located in the (b)(4), which is adjacent to the (b)(4) where the exposed cookie dough receives (b)(4).
- In the (b)(4), which is adjacent to the (b)(4) where the exposed cookie dough receives (b)(4).
FDA saw that the firm was seeing Listeria put was not aggressive in cleaning it up. The firm found 10 positive environmental LM samples and one positive product samples
"indicates that your firm is not taking aggressive action to identify harborage sites for L. monocytogenes, to deep clean your facility effectively, and to prevent finished product contamination."
The isolates from the facility were stated as all being genetically the same. This indicates an organism that has become well adapted to that facility.
- As far as GMP issues which would contribute to cross contamination:
- Spraying of the floor with hoses while product was not covered (1a)
- Residue on the floor with pallet jacks and forklifts running through it. (1b)
- Poor employee practices with regard to protecting clothing and boots from cross contamination. (1c)
- Sparying floor and drain with overspray hitting equipment (1d)
- Inadequate cleaning of a scale used to weigh pasteurized egg (2a)
- Rust and missing bolts on processing equipment (3)
Preventing these issues is the goal of FDA's new draft guidance for Listeria control in facilities that manufacture RTE products. It comes down to putting good practices in place, monitoring the environment and thus how well those practices are working, and then having a seek-and-destroy mentality with regard to Listeria.
FDA Warning Letter
Aspen Hills, Inc. 1/10/17