1
|
Klopfenstein T, Zayet S, Poloni S, Gendrin V, Fournier D, Vuillemenot JB, Selles P, Dussaucy A, Coureau G, Avalos-Fernandez M, Toko L, Royer PY, Lavoignet CE, Amari B, Puyraveau M, Chirouze C. CRP under 130 mg/L rules out the diagnosis of Legionella pneumophila serogroup 1 (URINELLA Study). Eur J Clin Microbiol Infect Dis 2024; 43:1051-1059. [PMID: 38530466 PMCID: PMC11178638 DOI: 10.1007/s10096-024-04814-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 03/18/2024] [Indexed: 03/28/2024]
Abstract
INTRODUCTION In case of pneumonia, some biological findings are suggestive for Legionnaire's disease (LD) including C-reactive protein (CRP). A low level of CRP is predictive for negative Legionella Urinary-Antigen-Test (L-UAT). METHOD Observational retrospective study in Nord-Franche-Comté Hospital with external validation in Besançon University Hospital, France which included all adults with L-UAT performed during January 2018 to December 2022. The objective was to determine CRP optimal threshold to predict a L-UAT negative result. RESULTS URINELLA included 5051 patients (83 with positive L-UAT). CRP optimal threshold was 131.9 mg/L, with a negative predictive value (NPV) at 100%, sensitivity at 100% and specificity at 58.0%. The AUC of the ROC-Curve was at 88.7% (95% CI, 86.3-91.1). External validation in Besançon Hospital patients showed an AUC at 89.8% (95% CI, 85.5-94.1) and NPV, sensitivity and specificity was respectively 99.9%, 97.6% and 59.1% for a CRP threshold at 131.9 mg/L; after exclusion of immunosuppressed patients, index sensitivity and NPV reached also 100%. CONCLUSION In case of pneumonia suspicion with a CRP level under 130 mg/L (independently of the severity) L-UAT is useless in immunocompetent patients with a NPV at 100%. We must remain cautious in patients with symptoms onset less than 48 h before CRP dosage.
Collapse
Affiliation(s)
- Timothée Klopfenstein
- Infectious Diseases and Tropical Department, Nord Franche-Comté Hospital, 90400, Trevenans, France.
| | - Souheil Zayet
- Infectious Diseases and Tropical Department, Nord Franche-Comté Hospital, 90400, Trevenans, France
| | - Samantha Poloni
- Infectious Diseases and Tropical Department, Besançon University Hospital, Besançon, France
| | - Vincent Gendrin
- Infectious Diseases and Tropical Department, Nord Franche-Comté Hospital, 90400, Trevenans, France
| | - Damien Fournier
- Bacteriology Laboratory, Besançon University Hospital, Besançon, France
| | | | - Philippe Selles
- Medical Information Department, Nord Franche-Comté Hospital, Trevenans, France
| | - Alain Dussaucy
- Medical Information Department, Besançon University Hospital, Besançon, France
| | - Gaelle Coureau
- University of Bordeaux, Population Health Research Center, UMR U1219, INSERM, Bordeaux, France
| | - Marta Avalos-Fernandez
- University of Bordeaux, Population Health Research Center, UMR U1219, INSERM, Bordeaux, France
| | - Lynda Toko
- Infectious Diseases and Tropical Department, Nord Franche-Comté Hospital, 90400, Trevenans, France
| | - Pierre-Yves Royer
- Infectious Diseases and Tropical Department, Nord Franche-Comté Hospital, 90400, Trevenans, France
| | | | - Bouchra Amari
- University of Bordeaux, Population Health Research Center, UMR U1219, INSERM, Bordeaux, France
| | - Marc Puyraveau
- Methodology Unit, Clinical Investigation Center INSERM 1431, Besançon University Hospital, Besançon, France
| | - Catherine Chirouze
- Infectious Diseases and Tropical Department, Besançon University Hospital, Besançon, France
- UMR-CNRS 6249 Chrono-Environnement, Department of Infectious and Tropical Diseases, Université de Franche-Comté, CHU Besançon, 25000, Besançon, France
| |
Collapse
|
2
|
Performance of Legiolert Test vs. ISO 11731 to Confirm Legionella pneumophila Contamination in Potable Water Samples. Pathogens 2020; 9:pathogens9090690. [PMID: 32842454 PMCID: PMC7560050 DOI: 10.3390/pathogens9090690] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/21/2020] [Accepted: 08/21/2020] [Indexed: 12/15/2022] Open
Abstract
Detection and enumeration of Legionella in water samples is of great importance for risk assessment analysis. The plate culture method is the gold standard, but has received several well-known criticisms, which have induced researchers to develop alternative methods. The purpose of this study was to compare Legionella counts obtained by the analysis of potable water samples through the plate culture method and through the IDEXX liquid culture Legiolert method. Legionella plate culture, according to ISO 11731:1998, was performed using 1 L of water. Legiolert was performed using both the 10 mL and 100 mL Legiolert protocols. Overall, 123 potable water samples were analyzed. Thirty-seven (30%) of them, positive for L. pneumophila, serogroups 1 or 2–14 by plate culture, were used for comparison with the Legiolert results. The Legiolert 10 mL test detected 34 positive samples (27.6%) and the Legiolert 100 mL test detected 37 positive samples, 27.6% and 30% respectively, out of the total samples analyzed. No significant difference was found between either the Legiolert 10 mL and Legiolert 100 mL vs. the plate culture (p = 0.9 and p = 0.3, respectively) or between the Legiolert 10 mL and Legiolert 100 mL tests (p = 0.83). This study confirms the reliability of the IDEXX Legiolert test for Legionella pneumophila detection and enumeration, as already shown in similar studies. Like the plate culture method, the Legiolert assay is also suitable for obtaining isolates for typing purposes, relevant for epidemiological investigations.
Collapse
|
3
|
Masterton RG, Bassetti M, Chastre J, MacDonald AG, Rello J, Seaton RA, Welte T, Wilcox MH, West P. Valuing antibiotics: The role of the hospital clinician. Int J Antimicrob Agents 2019; 54:16-22. [PMID: 31085298 DOI: 10.1016/j.ijantimicag.2019.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/23/2019] [Accepted: 05/08/2019] [Indexed: 10/26/2022]
Abstract
The global public health threat of antibiotic-resistant infections as well as the lack of new treatments in clinical development is a critical issue. Reasons for this include diminished commercial incentives for pharmaceutical companies to develop new antibiotics, which part-reflects a shift in antibiotic marketing paradigm from broad deployment to targeted therapy in relatively small patient populations. Such changes are encouraged by antimicrobial stewardship (AMS). Other factors include a lack of recognition in the traditional assessment of new antibiotics by regulators, health technology assessors and payers of the broad range of benefits of new agents, particularly their value to health care, economies and society. Recognising the seriousness of the situation, there have been recent changes and proposals by regulators for modification of the assessment process to accommodate a broader range of acceptable data supporting new drug applications. There is also increasing recognition by some payers of the societal benefit of new antibiotics and the need for financial incentives for those developing high-priority antibiotics. However, progress is slow, with recent publications focusing on industry and strategic perspectives rather than clinical implications. In this opinion piece, we therefore focus on clinicians and the practical steps they can take to drive and contribute to increasing awareness and understanding of the value of antibiotics. This includes identifying and gathering appropriate alternative data sources, educating on AMS and prescribing habits, and contributing to international antibiotic susceptibility surveillance models.
Collapse
Affiliation(s)
- Robert G Masterton
- Academy of Infection Management (AIM) Ltd., BioHub at Alderley Park, Alderley Edge, Cheshire SK10 4TG, UK.
| | - Matteo Bassetti
- Infectious Diseases Clinic, Department of Medicine University of Udine and Azienda Sanitaria Universitaria Integrata di Udine, Udine, Italy
| | - Jean Chastre
- Institut de Cardiologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | | | - Jordi Rello
- Department of Critical Care, Vall d'Hebron Institut of Research, Centro de Investigacion Biomedica en Red (CIBERES), Barcelona, Spain
| | - R Andrew Seaton
- Department of Infectious Diseases, NHS Greater Glasgow and Clyde, and Scottish Antimicrobial Prescribing Group, UK
| | - Tobias Welte
- Department of Respiratory Medicine and German Center for Lung Research, Hannover Medical School, Hannover, Germany
| | - Mark H Wilcox
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust and University of Leeds, Leeds, UK
| | - Peter West
- Academy of Infection Management (AIM) Ltd., BioHub at Alderley Park, Alderley Edge, Cheshire SK10 4TG, UK
| |
Collapse
|