Outsource vs In-House Microbiology Testing
Routine, high-frequency microbiology such as environmental monitoring and basic counts is often brought in-house by food and pharmaceutical manufacturers, while pathogen testing, identification and specialized methods are commonly outsourced — partly to keep pathogens out of production sites.
Often kept in-house
- Environmental monitoring
- Total counts, yeast and mould
- Water system monitoring
Often outsourced
- Pathogen detection
- Organism identification
- Sterility testing and validation studies
Factors to weigh
- Testing volume and how predictable it is
- Equipment capital cost and depreciation (obtain real supplier quotations)
- Operating costs: consumables, gases, reference materials, service contracts
- Staff expertise, training and retention
- Facility requirements: space, utilities, ventilation, environmental control
- Calibration, maintenance and instrument qualification
- Method validation and quality system (e.g. ISO/IEC 17025 if accredited results are needed)
- Turnaround needed versus outside laboratory turnaround plus shipping
- Sample logistics, stability and holding times
- Expected instrument utilization
Common questions
- Is it risky to test pathogens on site?
- Many manufacturers avoid handling pathogens near production. Seek biosafety advice before bringing pathogen work in-house.
- Is there a volume where in-house pays off?
- There is no universal figure. Compare fully loaded in-house cost — equipment, staff, calibration, consumables, quality overhead — against real outside quotations for your actual annual volume.