My company co-packs various dry powders and we 3rd party lab test finished packets.
We had a sugar/salt drink mix product come back with 1500 TPC, when all other lots had zero. We retested retains on bulk and finished packets for the lot and had zero again. But asked the lab to retest their retain from the first test and it came back with 150,000 TPC confirming positive bacterial contamination.
My question is does this new test indicate growth and what could possibly grow under the conditions of the particular product? The only results we've gotten with products having 100,000+ TPC were probiotics, and this product was ran on different lines.The manufacturer of the product doesn't produce probiotics.
The lab insisted there was no issue with contamination on their end, but is it possible?