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Updated: May 5, 2026
RNA Isolation of Pseudomonas aeruginosa Colonizing the Murine Gastrointestinal Tract
Published on: September 28, 2011
Low-speed centrifugation based isolation and self-priming mediated chain extension based fluorescent quantification
Lili Pian1, Duoduo Liu1, Dongmiao Chen1
1Department of Laboratory Medicine, Nanfang Hospital Zengcheng Campus, Southern Medical University, Guangzhou City, 511356, Guangdong Province, China.
Abstract:
Infections acquired at home and hospital are rather prevalent, and the incidence of these infections has been on the rise in recent years due to the growing elderly population. Infections caused by Pseudomonas aeruginosa (P. aeruginosa) pose a significant risk to human health and are prevalent among patients in hospitals and nursing homes. Consequently, it is imperative to devise an innovative and fluorescent method for analyzing P. aeruginosa to facilitate the early identification of home-acquired pneumonia. However, it is difficult to isolate and simultaneously quantify P. aeruginosa using most of the currently available methods. We present a novel platform that combines aptamer recognition-based aggregation of target bacteria with self-priming induced chain extension for signal amplification. This approach facilitates low-speed centrifugation-based isolation and simultaneous quantification of P. aeruginosa. The chain displacement procedure is incorporated for signal amplification, providing the approach with a broad detection range of six orders of magnitude and a low detection limit of 2.4 cfu/mL. In addition to its exceptional sensitivity, the method demonstrates commendable selectivity for the detection of P. aeruginosa, rendering it a viable instrument for identifying home-acquired pneumonia caused by P. aeruginosa and facilitating the early management of P. aeruginosa infections in the emergency department.
Insights
A new fluorescent method detects Pseudomonas aeruginosa (P. aeruginosa) infections, crucial for early pneumonia diagnosis. This innovative technique allows for sensitive and selective bacterial quantification, aiding rapid patient management.
Area of Science:
- Microbiology
- Biotechnology
- Medical Diagnostics
Background:
- Prevalence of hospital-acquired and community-acquired infections, particularly in the elderly population.
- Pseudomonas aeruginosa (P. aeruginosa) poses a significant health risk, especially in healthcare settings.
- Limitations of current methods for isolating and quantifying P. aeruginosa.
Purpose of the Study:
- To develop an innovative fluorescent method for P. aeruginosa analysis.
- To facilitate early identification of home-acquired pneumonia caused by P. aeruginosa.
- To enable simultaneous isolation and quantification of P. aeruginosa.
Main Methods:
- A novel platform combining aptamer recognition-based bacterial aggregation with self-priming induced chain extension for signal amplification.
- Low-speed centrifugation for bacterial isolation.
- Chain displacement procedure for signal amplification.
Main Results:
- Simultaneous isolation and quantification of P. aeruginosa.
- Broad detection range spanning six orders of magnitude.
- Low detection limit of 2.4 colony-forming units (cfu)/mL.
- High sensitivity and selectivity for P. aeruginosa detection.
Conclusions:
- The developed method is a viable instrument for identifying P. aeruginosa-caused home-acquired pneumonia.
- Facilitates early management of P. aeruginosa infections in emergency departments.
- Offers a sensitive, selective, and efficient approach for bacterial analysis.
