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Updated: Aug 11, 2026
Multiplex PCR and Reverse Line Blot Hybridization Assay mPCR/RLB
Published on: August 6, 2011
Loop-Mediated Isothermal Amplification Coupled with Reverse Line Blot Hybridization for the Detection of Pseudomonas
Daniel Ferrusca Bernal1, Juan Mosqueda1,2, Gilberto Pérez-Sánchez3
1Immunology and Vaccines Laboratory, Natural Sciences College, Autonomous University of Queretaro, Queretaro 76010, Mexico.
Abstract:
Pseudomonas aeruginosa is a pathogen of critical priority importance according to the WHO. Due to its multi-resistance and expression of various virulence factors, it is the causal agent of severe healthcare-acquired infections (HAIs). Effective strategies to control infections caused by P. aeruginosa must include early and specific detection of the pathogen for early and timely antibiotic prescription. The need to develop a specific and reproducible diagnostic technique is urgent, which must often be more sensitive and faster than current clinical diagnostic methods. In this study, we implement and standardize the loop-mediated isothermal amplification (LAMP) technique, coupled with the reverse line blot hybridization (RLBH) technique for the detection of P. aeruginosa. A set of primers and probes was designed to amplify a specific region of the P. aeruginosa 16s rRNA gene. The sensitivity of the LAMP-RLBH method was 3 × 10-4 ng/μL, 1000 times more sensitive than the PCR and LAMP technique (this work), with a sensitivity of 3 × 10-3 ng/μL. The LAMP-RLBH and LAMP techniques showed specific amplification and no cross-reaction with members of the ESKAPE group and other Pseudomonas species. The present investigation provides a technique that can be easily performed in less time, achieving a faster and more reliable alternative compared to traditional microbial diagnostic methods for the detection of P. aeruginosa.
Insights
A new diagnostic method combining loop-mediated isothermal amplification (LAMP) and reverse line blot hybridization (RLBH) offers highly sensitive and specific detection of Pseudomonas aeruginosa. This rapid technique aids in early diagnosis and timely antibiotic treatment for healthcare-associated infections.
Area of Science:
- Microbiology
- Molecular Diagnostics
- Infectious Diseases
Background:
- Pseudomonas aeruginosa is a critical priority pathogen causing severe healthcare-acquired infections (HAIs).
- Its multi-resistance and virulence factors necessitate rapid and specific diagnostic methods for effective treatment.
- Current diagnostic methods often lack the required sensitivity and speed.
Purpose of the Study:
- To implement and standardize a loop-mediated isothermal amplification (LAMP) coupled with reverse line blot hybridization (RLBH) technique for P. aeruginosa detection.
- To develop a sensitive, specific, and rapid diagnostic alternative to traditional methods.
Main Methods:
- Design of primers and probes targeting the P. aeruginosa 16s rRNA gene.
- Implementation and standardization of LAMP coupled with RLBH (LAMP-RLBH).
- Comparison of sensitivity and specificity against PCR and LAMP alone, including testing against ESKAPE group pathogens and other Pseudomonas species.
Main Results:
- The LAMP-RLBH method achieved a sensitivity of 3 × 10^-4 ng/μL, which is 1000 times more sensitive than PCR and LAMP alone (3 × 10^-3 ng/μL).
- Both LAMP-RLBH and LAMP demonstrated specific amplification without cross-reactivity with other relevant bacterial species.
- The developed technique is faster and more reliable than traditional microbial diagnostic methods.
Conclusions:
- The LAMP-RLBH technique provides a highly sensitive and specific method for P. aeruginosa detection.
- This approach offers a faster and more reliable alternative for early diagnosis of P. aeruginosa infections.
- The method facilitates timely antibiotic prescription, crucial for managing HAIs caused by this pathogen.
