What is the difference between micC and micH?
micC detects particular species of sulfate-reducing bacteria (SRB) while micH detects particular species of methanogenic archaea. Both accelerate corrosion through direct electron transfer mechanisms. Used together, these biomarkers offer a more complete picture of MIC (EMIC) risk and enable more precise corrosion threat assessments.
Why should I test for micC if I already test for SRB?
Tradition SRB assays detect the presence of all sulfate-reducing bacteria, which is useful for understanding overall microbial dynamics and indirect MIC risk (i.e. product of corrosive sulfide). However, not all SRB directly contribute to corrosion (direct interaction with metal surfaces)
The micC assay focuses on corrosive SRB strains specifically linked to MIC, offering higher specificity and helping prioritize systems that require targeted mitigation.
How often should micC testing be performed?
Testing frequency should reflect the system's risk level and operational sensitivity.
- High-risk systems: Monthly to bimonthly testing is recommended to monitor microbial shifts closely and respond quickly to changes that could signal early MIC development
- Moderate-risk systems: Quarterly testing can help track trends and ensure that mitigation strategies remain effective.
- Low-risk or well-controlled systems: Annual testing may be sufficient, but testing frequency should be increased if there is a history of MIC or any change in system condition (e.g., temperature, flow rate, or biocide program).
How does micC testing fit into a microbial monitoring program?
micC should be combined with ATP, universal qPCR, or NGS testing for a complete microbial monitoring strategy. This ensures that both broad microbial activity and MIC-specific risks are assessed.
What does a positive micC result mean?
A positive micC result indicates that corrosive SRB are present in your system, meaning there is an elevated thread of MIC. In response, operators should:
- Monitor trends over time to assess microbial changes.
- Implement preventative or corrective actions, such as biocide treatments or system modifications.
- Perform follow-up testing to evaluate the effectiveness of mitigation efforts.
Need Help of Want to Learn More?
Our team of experts is here to assist you with your microbiological monitoring needs. Whether you have questions, need technical support, or want to learn more about GeneCount qPCR testing, contact LuminUltra® Support to get started.