Microbial Limits Testing for Research-Use Peptide Products
Microbial limits testing (MLT) quantifies the total microbial load in a peptide product and screens for specific objectionable organisms. While distinct from sterility testing, MLT provides valuable information about product quality and manufacturing hygiene.
What MLT Measures
Total Aerobic Microbial Count (TAMC): The total number of aerobic bacteria and fungi per gram or milliliter of product.
Total Yeast and Mold Count (TYMC): Specifically quantifies fungal contamination.
Absence of Specified Organisms: Tests for the absence of particularly harmful microorganisms such as E. coli, Salmonella, Pseudomonas aeruginosa, and Staphylococcus aureus.
Methods
MLT typically involves:
- Dissolving or suspending the peptide sample in a suitable medium
- Plating on appropriate growth media (e.g., Tryptic Soy Agar for bacteria, Sabouraud Dextrose Agar for fungi)
- Incubating for specified periods (typically 3–5 days for bacteria, 5–7 days for fungi)
- Counting colonies and expressing results as colony-forming units (CFU) per gram or milliliter
Significance for Research
Microbial contamination in peptide products can:
- Introduce endotoxins and other metabolic byproducts
- Degrade peptides through proteolytic enzyme activity
- Contaminate cell cultures and biological assays
- Produce artifacts in experimental results
Evolve Aminos Quality Control
Our microbial testing program verifies that our products meet appropriate cleanliness standards, giving you confidence that your research materials are free from significant microbial contamination.