The Rapid Micro Blog

Our blog will keep you informed of new and noteworthy technologies, reviews of recent publications and presentations, upcoming conferences and training events, and what's changing in the rapid and alternative microbiological methods world.

New Approaches to BCC Detection Using Loop-Mediated Isothermal Amplification

Image created by Dr. Michael J. Miller

The pharmaceutical, personal care and medical device industries have experienced significant BCC contamination events in recent years,. As such, I will be presenting an overview of BCC investigation and remediation case studies at this year's PDA Global Conference on Microbiology.  

Numerous detection methods are currently in use, including those described in USP <60> and rapid PCR and real-time quantitative PCR (qPCR) assays. However, there is a continued desire to develop more rapid and sensitive BCC detection strategies.

To meet this need, a team of scientists from FDA, academia and industry recently published a paper titled, "Loop-Mediated Isothermal Amplification (LAMP) Assay for Detecting Burkholderia cepacia Complex in Non-Sterile Pharmaceutical Products."

Their abstract is reproduced below, and I encourage you to review the publication at your leisure.

Loop-Mediated Isothermal Amplification (LAMP) Assay for Detecting Burkholderia cepacia Complex in Non-Sterile Pharmaceutical Products. Soumana Daddy Gaoh, Ohgew Kweon, Yong-Jin Lee, John J. LiPuma, David Hussong, Bernard Marasa and Youngbeom Ahn. Pathogens 2021, 10(9), 1071. 


Simple and rapid detection of Burkholderia cepacia complex (BCC) bacteria, a common cause of pharmaceutical product recalls, is essential for consumer safety. In this study, we developed and evaluated a ribB-based colorimetric loop-mediated isothermal amplification (LAMP) assay for the detection of BCC in (i) nuclease-free water after 361 days, (ii) 10 μg/mL chlorhexidine gluconate (CHX) solutions, and (iii) 50 μg/mL benzalkonium chloride (BZK) solutions after 184 days. The RibB 5 primer specifically detected 20 strains of BCC but not 36 non-BCC strains. The limit of detection of the LAMP assay was 1 pg/μL for Burkholderia cenocepacia strain J2315. Comparison of LAMP with a qPCR assay using 1440 test sets showed higher sensitivity: 60.6% in nuclease-free water and 42.4% in CHX solution with LAMP vs. 51.3% and 31.1%, respectively, with qPCR. These results demonstrate the potential of the ribB-based LAMP assay for the rapid and sensitive detection of BCC in pharmaceutical manufacturing.

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