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Wang S, Wang S, Tang Y, Peng G, Hao T, Wu X, Wei J, Qiu X, Zhou D, Zhu S, Li Y, Wu S. Detection of Klebsiella pneumonia DNA and ESBL positive strains by PCR-based CRISPR-LbCas12a system. Front Microbiol 2023; 14:1128261. [PMID: 36846807 PMCID: PMC9948084 DOI: 10.3389/fmicb.2023.1128261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/26/2023] [Indexed: 02/11/2023] Open
Abstract
INTRODUCTION Klebsiella pneumonia (K. pneumonia) is a Gram-negative bacterium that opportunistically causes nosocomial infections in the lung, bloodstream, and urinary tract. Extended-spectrum β-Lactamases (ESBLs)-expressed K. pneumonia strains are widely reported to cause antibiotic resistance and therapy failure. Therefore, early identification of K. pneumonia, especially ESBL-positive strains, is essential in preventing severe infections. However, clinical detection of K. pneumonia requires a time-consuming process in agar disk diffusion. Nucleic acid detection, like qPCR, is precise but requires expensive equipment. Recent research reveals that collateral cleavage activity of CRISPR-LbCas12a has been applied in nucleic acid detection, and the unique testing model can accommodate various testing models. METHODS This study established a system that combined PCR with CRISPR-LbCas12a targeting the K. pneumoniae system. Additionally, this study summarized the antibiotic-resistant information of the past five years' K. pneumoniae clinic cases in Luohu Hospital and found that the ESBL-positive strains were growing. This study then designs a crRNA that targets SHV to detect ESBL-resistant K. pneumoniae. This work is to detect K. pneumoniae and ESBL-positive strains' nucleic acid using CRISPR-Cas12 technology. We compared PCR-LbCas12 workflow with PCR and qPCR techniques. RESULTS AND DISCUSSION This system showed excellent detection specificity and sensitivity in both bench work and clinical samples. Due to its advantages, its application can meet different detection requirements in health centers where qPCR is not accessible. The antibiotic-resistant information is valuable for further research.
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Affiliation(s)
- Shang Wang
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Shan Wang
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Ying Tang
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Teaching Center of Shenzhen Luohu Hospital, Shantou University Medical College, Shantou, China
| | - Guoyu Peng
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Tongyu Hao
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
| | - Xincheng Wu
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Jiehong Wei
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
| | - Xinying Qiu
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
- School of Medicine, Anhui University of Science and Technology, Huainan, China
| | - Dewang Zhou
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
- Kobilka Institute of Innovative Drug Discovery, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
| | - Shimao Zhu
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
| | - Yuqing Li
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
- *Correspondence: Yuqing Li, ; Song Wu,
| | - Song Wu
- Institute of Urology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Medical Laboratory of Shenzhen Luohu People’s Hospital, Shenzhen, China
- South China Hospital, Health Science Center, Shenzhen University, Shenzhen, China
- *Correspondence: Yuqing Li, ; Song Wu,
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Hutchison JR, Brooks SM, Kennedy ZC, Pope TR, Deatherage Kaiser BL, Victry KD, Warner CL, Oxford KL, Omberg KM, Warner MG. Polysaccharide-based liquid storage and transport media for non-refrigerated preservation of bacterial pathogens. PLoS One 2019; 14:e0221831. [PMID: 31490969 PMCID: PMC6730858 DOI: 10.1371/journal.pone.0221831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 08/15/2019] [Indexed: 11/18/2022] Open
Abstract
The preservation of biological samples for an extended time period of days to weeks after initial collection is important for the identification, screening, and characterization of bacterial pathogens. Traditionally, preservation relies on cold-chain infrastructure; however, in many situations this is impractical or not possible. Thus, our goal was to develop alternative bacterial sample preservation and transport media that are effective without refrigeration or external instrumentation. The viability, nucleic acid stability, and protein stability of Bacillus anthracis Sterne 34F2, Francisella novicida U112, Staphylococcus aureus ATCC 43300, and Yersinia pestis KIM D27 (pgm-) was assessed for up to 28 days. Xanthan gum (XG) prepared in PBS with L-cysteine maintained more viable F. novicida U112 cells at elevated temperature (40°C) compared to commercial reagents and buffers. Viability was maintained for all four bacteria in XG with 0.9 mM L-cysteine across a temperature range of 22-40°C. Interestingly, increasing the concentration to 9 mM L-cysteine resulted in the rapid death of S. aureus. This could be advantageous when collecting samples in the built environment where there is the potential for Staphylococcus collection and stabilization rather than other organisms of interest. F. novicida and S. aureus DNA were stable for up to 45 days upon storage at 22°C or 40°C, and direct analysis by real-time qPCR, without DNA extraction, was possible in the XG formulations. XG was not compatible with proteomic analysis via LC-MS/MS due to the high amount of residual Xanthomonas campestris proteins present in XG. Our results demonstrate that polysaccharide-based formulations, specifically XG with L-cysteine, maintain bacterial viability and nucleic acid integrity for an array of both Gram-negative and Gram-positive bacteria across ambient and elevated temperatures.
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Affiliation(s)
- Janine R. Hutchison
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
- * E-mail: (JH); (MW)
| | - Shelby M. Brooks
- Subsurface Science and Technology Group, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Zachary C. Kennedy
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Timothy R. Pope
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Brooke L. Deatherage Kaiser
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Kristin D. Victry
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Cynthia L. Warner
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Kristie L. Oxford
- Integrated Omics, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Kristin M. Omberg
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
| | - Marvin G. Warner
- Chemical and Biological Signature Sciences Group, National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States of America
- * E-mail: (JH); (MW)
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