Why microbiology belongs on the specification
Botanical and protein-based raw materials can carry microorganisms from the field, the drying process and the packing room. Most of them are harmless in a controlled process, but the limits on the specification decide whether the material is fit for your product and for your customer. A specification that says only "conforms" does not tell the buyer which tests were run or what the limits are.
Our bulk extracts ship with a certificate of analysis for each lot. Read the microbiology section before the material is released into stock.
Total plate count
The total aerobic plate count (TAMC) estimates the number of bacteria and fungi that grow under standard conditions. It is a general indicator of hygiene, not a test for a specific pathogen. A low limit suggests good control in processing, but the count alone does not show that a product is safe. Check the unit, usually colony-forming units per gram, and the method reference.
Yeasts and moulds
The yeast and mould count (TYMC) is often more relevant for dry botanicals, because moulds can grow if moisture rises during storage. Compare the limit with the product type and the storage conditions. A dry powder kept in a damp warehouse can fail a limit that the same batch met on dispatch.
Pathogens and indicator organisms
Most specifications test for pathogens such as Salmonella, E. coli and, for some materials, Staphylococcus aureus or Bacillus cereus. These are usually stated as absent in a given sample weight. Check the sample size, because "absent in 10 g" and "absent in 25 g" are different levels of assurance. Some specifications also state a limit for enterobacteriaceae, an indicator of hygiene.
Method and reference
Ask which method is used and whether it follows a recognised standard, for example an ISO method for the test. Results from different laboratories are comparable only when the method and the sample size match.
Checklist before you accept a lot
1. Confirm the unit and the sample size for every microbiological result. 2. Confirm the limits are the ones your product type requires. 3. Confirm the method reference and the testing laboratory. 4. Check the date of testing against the date of dispatch. 5. Store the sample from each lot for traceability, and keep the certificate with the batch record.
Next step
Tell us the product, the format and your target market, and we send the microbiology specification with the certificate of analysis for each lot. We reply with prices and documents within one hour on business days. You can also request a sample to check the result in your own process.