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Fullana Barceló MI, Artigues Serra F, Millan Pons AR, Asensio Rodriguez J, Ferre Beltran A, Del Carmen Lopez Bilbao M, Reina Prieto J, Riera Jaume M. Analysis of viral pneumonia and risk factors associated with severity of influenza virus infection in hospitalized patients from 2012 to 2016. BMC Infect Dis 2024; 24:302. [PMID: 38475703 DOI: 10.1186/s12879-024-09173-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 02/24/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND Influenza viruses cause pneumonia in approximately one-third of cases, and pneumonia is an important cause of death. The aim was to identify risk factors associated with severity and those that could predict the development of pneumonia. METHODS This retrospective, observational study included all adult patients with confirmed influenza virus infection admitted to Son Espases University Hospital during four influenza seasons in Spain (October to May) from to 2012-2016. RESULTS Overall, 666 patients with laboratory-confirmed influenza were included, 93 (14%) of which were severe; 73 (10.9%) were admitted to Intensive Care Unit (ICU), 39 (5.8%) died, and 185 (27.7%) developed pneumonia. Compared to less severe cases, patients with severe disease: were less vaccinated (40% vs. 28%, p = 0.021); presented with more confusion (26.9% vs. 6.8%), were more hypoxemic (Horowitz index (PaO2/FiO2) 261 vs. 280), had higher C-reactive protein (CRP) (12.3 vs. 4.0), had more coinfections (26.8% vs. 6.3%) and had more pleural effusion (14% vs. 2.6%) (last six all p < 0.001). Risk factors significantly associated with severity were pneumonia [OR (95% CI) = 4.14 (2.4-7.16)], history of heart disease (1.84, 1.03-3.28), and confusion at admission (4.99, 2.55-9.74). Influenza vaccination was protective (0.53, 0.28-0.98). Compared to those without pneumonia, the pneumonia group had higher CRP (11.3 vs. 4.0, p < 0.001), lower oxygen saturation (92% vs. 94%, p < 0.001), were more hypoxic (PaO2/FiO2 266 vs. 281, p < 0.001), and incurred more mechanical ventilation, septic shock, admission to the ICU, and deaths (all four p < 0.001). Higher CRP and lower oxygen saturation were independent variables for predicting the development of pneumonia. CONCLUSIONS Pneumonia, history of heart disease, confusion and no influenza vaccination were independent variables to present complications in patients admitted with influenza infection.
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Affiliation(s)
- M I Fullana Barceló
- Internal Medicine Department, Infectious Diseases Section, Hospital Universitari Son Espases, Valldemossa Road 79, Palma de Mallorca, 07010, Spain.
| | - F Artigues Serra
- Internal Medicine Department, Infectious Diseases Section, Hospital Universitari Son Espases, Valldemossa Road 79, Palma de Mallorca, 07010, Spain
| | - A R Millan Pons
- IdISBa estadistic and methodological support, Hospital Universitari Son Espases, Palma de Mallorca, Spain
| | - J Asensio Rodriguez
- Internal Medicine Department, Infectious Diseases Section, Hospital Universitari Son Espases, Valldemossa Road 79, Palma de Mallorca, 07010, Spain
| | - A Ferre Beltran
- Internal Medicine Department, Infectious Diseases Section, Hospital Universitari Son Espases, Valldemossa Road 79, Palma de Mallorca, 07010, Spain
| | | | - J Reina Prieto
- Microbiological Department, Hospital Universitari Son Espases, Palma de Mallorca, Spain
| | - M Riera Jaume
- Internal Medicine Department, Infectious Diseases Section, Hospital Universitari Son Espases, Valldemossa Road 79, Palma de Mallorca, 07010, Spain
- IdISBa- Fundació Institut d'Investigació Sanitària Illes Balears, Palma de Mallorca, Spain
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Houshmand H, Porta C, Pradelli L, Pinciroli M, Sotgiu G. Cost-Impact Analysis of a Novel Diagnostic Test to Assess Community-Acquired Pneumonia Etiology in the Emergency Department Setting: A Multi-Country European Study. Int J Environ Res Public Health 2023; 20:3853. [PMID: 36900863 PMCID: PMC10001249 DOI: 10.3390/ijerph20053853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/30/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND We aimed to estimate the economic and clinical impacts of a novel diagnostic test called LIAISON® MeMed BV® (LMMBV), which can differentiate bacterial from viral infections, in patients with community-acquired pneumonia (CAP) in emergency departments. METHODS A cost-impact simulation model was developed to investigate the financial consequences of the introduction of LMMBV into the standard of care (SOC) diagnostic process in Italy, Germany, and Spain. Clinical outcomes were expressed as antibiotic patients and days saved, reduced hospital admissions, and shortened hospital length of stay (LOS). Cost savings were evaluated from the perspectives of third-party payers and hospitals. A deterministic sensitivity analysis (DSA) was carried out. RESULTS LMMBV was associated with a reduction in antibiotic prescriptions, treatment duration, and LOS. Furthermore, the adoption of LMMBV would allow savings per patient up to EUR 364 and EUR 328 for hospitals and EUR 91 and EUR 59 for payers in Italy and Germany, respectively. In Spain, average savings per patient could reach up to EUR 165 for both payers and hospitals. Savings were most sensitive to test accuracy, with DSA confirming the robustness of the results. CONCLUSIONS Combining LMMBV with the current SOC diagnostic process is expected to provide clinical and economic benefits in Italy, Germany, and Spain.
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Affiliation(s)
| | - Camilla Porta
- AdRes Health Economics and Outcomes Research, 10121 Torino, Italy
| | - Lorenzo Pradelli
- AdRes Health Economics and Outcomes Research, 10121 Torino, Italy
| | | | - Giovanni Sotgiu
- Scienze Mediche Chirurgiche E Sperimentali, Università degli Studi di Sassari, 07100 Sassari, Italy
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Hegelund MH, Glenthøj A, Ryrsø CK, Ritz C, Dungu AM, Sejdic A, List KCK, Krogh-Madsen R, Lindegaard B, Kurtzhals JAL, Faurholt-Jepsen D. Biomarkers for iron metabolism among patients hospitalized with community-acquired pneumonia caused by infection with SARS-CoV-2, bacteria, and influenza. APMIS 2022; 130:590-596. [PMID: 35751642 PMCID: PMC9349447 DOI: 10.1111/apm.13259] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 06/22/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Ferritin, the central iron storage protein, has attracted attention as a biomarker of severe COVID-19. Few studies have investigated regulators of iron metabolism in the context of COVID-19. The aim was to evaluate biomarkers for iron metabolism in the acute phase response to community-acquired pneumonia (CAP) caused by SARS-CoV-2 compared to CAP caused by bacteria or influenza virus in hospitalized patients. METHODS A cross-sectional study of 164 patients from the Surviving Pneumonia Cohort recruited between January 8, 2019 and May 26, 2020. Blood samples were collected at admission and analyzed for levels of C-reactive protein (CRP), ferritin, soluble transferrin receptor, erythroferrone, and hepcidin. RESULTS Median (IQR) hepcidin was higher in SARS-CoV-2 with 143.8 (100.7-180.7) ng/mL compared to bacterial and influenza infection with 78.8 (40.1-125.4) and 53.5 (25.2-125.8) ng/mL, respectively. The median ferritin level was more than 2-fold higher in patients with SARS-CoV-2 compared to the other etiologies (p<0.001). Patients with SARS-CoV-2 had lower levels of erythroferrone and CRP compared to those infected with bacteria. CONCLUSION Higher levels of hepcidin and lower levels of erythroferrone despite lower CRP levels among patients with SARS-CoV-2 compared to those infected with bacteria indicate alterations in iron metabolism in patients with SARS-CoV-2 infection.
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Affiliation(s)
- Maria Hein Hegelund
- Department of Pulmonary and Infectious Diseases, Nordsjaellands Hospital, Hillerød, Denmark
| | | | - Camilla Koch Ryrsø
- Department of Pulmonary and Infectious Diseases, Nordsjaellands Hospital, Hillerød, Denmark.,Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Christian Ritz
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - Arnold Matovu Dungu
- Department of Pulmonary and Infectious Diseases, Nordsjaellands Hospital, Hillerød, Denmark
| | - Adin Sejdic
- Department of Pulmonary and Infectious Diseases, Nordsjaellands Hospital, Hillerød, Denmark
| | | | - Rikke Krogh-Madsen
- Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Department of Infectious Diseases, Hvidovre Hospital, Hvidovre, Denmark
| | - Birgitte Lindegaard
- Department of Pulmonary and Infectious Diseases, Nordsjaellands Hospital, Hillerød, Denmark.,Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Institute for Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen Anders Lindholm Kurtzhals
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark.,Centre for Medical Parasitology, Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
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Schneider JE, Cooper JT. Cost impact analysis of novel host-response diagnostic for patients with community-acquired pneumonia in the emergency department. J Med Econ 2022; 25:138-151. [PMID: 34994273 DOI: 10.1080/13696998.2022.2026686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND There is significant over-prescription of antibiotics for suspected community-acquired pneumonia (CAP) patients as bacterial and viral pathogens are difficult to differentiate. To address this issue, a host response diagnostic called MeMed BV (MMBV) was developed that accurately differentiates bacterial from viral infection at the point of need by integrating measurements of multiple biomarkers. A literature-based cost-impact model was developed that compared the cost impact and clinical benefits between using the standard of care diagnostics combined with MMBV relative to standard of care diagnostics alone. METHODS The patient population was stratified according to the pneumonia severity index, and cost savings were considered from payer and provider perspectives. Four scenarios were considered. The main analysis considers the cost impact of differences in antibiotic stewardship and resulting adverse events. The first, second, and third scenarios combine the impacts on antibiotic stewardship with changes in hospital admission probability, length of hospital stay and diagnosis related group (DRG) reallocation, and hospital admission probability, length of stay, and DRG reallocation in combination, respectively. RESULTS The main analysis results show overall per-patient savings of $37 for payers and $223 for providers. Scenarios 1, 2, and 3 produced savings of $137, $189, and $293 for payers, and $339, $713, and $809 for providers, respectively. LIMITATIONS Models are simulations of real-world clinical processes, and are not sensitive to variations in clinical practice driven by differences in physician practice styles, differences in facility-level practice patterns, and patient comorbidities expected to exacerbate the clinical impact of CAP. Hospital models are limited to costs and do not consider differences in revenue associated with each approach. CONCLUSIONS Introducing MMBV to the current SOC diagnostic process is likely to be cost-saving to both hospitals and payers when considering impacts on antibiotic distribution, hospital admission rate, hospital LOS, and DRG reallocation.
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Fink DL, Khan PY, Goldman N, Cai J, Hone L, Mooney C, El-Shakankery KH, Sismey G, Whitford V, Marks M, Thomas S. Development and internal validation of a diagnostic prediction model for COVID-19 at time of admission to hospital. QJM 2021; 114:699-705. [PMID: 33165573 PMCID: PMC7717412 DOI: 10.1093/qjmed/hcaa305] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/15/2020] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Early coronavirus disease 2019 (COVID-19) diagnosis prior to laboratory testing results is crucial for infection control in hospitals. Models exist predicting COVID-19 diagnosis, but significant concerns exist regarding methodology and generalizability. AIM To generate the first COVID-19 diagnosis risk score for use at the time of hospital admission using the TRIPOD (transparent reporting of a multivariable prediction model for individual prognosis or diagnosis) checklist. DESIGN A multivariable diagnostic prediction model for COVID-19 using the TRIPOD checklist applied to a large single-centre retrospective observational study of patients with suspected COVID-19. METHODS 581 individuals were admitted with suspected COVID-19; the majority had laboratory-confirmed COVID-19 (420/581, 72.2%). Retrospective collection was performed of electronic clinical records and pathology data. RESULTS The final multivariable model demonstrated AUC 0.8535 (95% confidence interval 0.8121-0.8950). The final model used six clinical variables that are routinely available in most low and high-resource settings. Using a cut-off of 2, the derived risk score has a sensitivity of 78.1% and specificity of 86.8%. At COVID-19 prevalence of 10% the model has a negative predictive value (NPV) of 96.5%. CONCLUSIONS Our risk score is intended for diagnosis of COVID-19 in individuals admitted to hospital with suspected COVID-19. The score is the first developed for COVID-19 diagnosis using the TRIPOD checklist. It may be effective as a tool to rule out COVID-19 and function at different pandemic phases of variable COVID-19 prevalence. The simple score could be used by any healthcare worker to support hospital infection control prior to laboratory testing results.
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Affiliation(s)
- D L Fink
- Department of Infectious Diseases, Whipps Cross Hospital, Bart’s Health NHS Trust, London
- Corresponding author: Dr Douglas Fink, Department of Infectious Diseases, Whipps Cross University Hospital, Whipps Cross road, Leytonstone, London, E11 1NR; +447815142926
| | - P Y Khan
- Department of Clinical Research, London School of Hygiene and Tropical Medicine, London
| | - N Goldman
- Department of Respiratory Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - J Cai
- Department of Infectious Diseases, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - L Hone
- Department of Respiratory Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - C Mooney
- Department of Respiratory Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - K H El-Shakankery
- Department of Respiratory Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - G Sismey
- Department of Respiratory Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - V Whitford
- Department of Respiratory Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
| | - M Marks
- Department of Clinical Research, London School of Hygiene and Tropical Medicine, London
| | - S Thomas
- Department of Infectious Diseases, Whipps Cross Hospital, Bart’s Health NHS Trust, London
- Department of Acute Medicine, Whipps Cross Hospital, Bart’s Health NHS Trust, London
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Burgmeijer EH, Duijkers R, Lutter R, Bonten MJM, Schweitzer VA, Boersma WG. Plasma cytokine profile on admission related to aetiology in community-acquired pneumonia. Clin Respir J 2019; 13:605-613. [PMID: 31310442 DOI: 10.1111/crj.13062] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 06/20/2019] [Accepted: 07/08/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND Potentially unnecessary antibiotic use for community-acquired pneumonia (CAP) contributes to selection of antibiotic-resistant pathogens. Cytokine expression at the time that treatment is started may assist in identifying patients not requiring antibiotics. We determined plasma cytokine patterns in patients retrospectively categorized as strict viral, pneumococcal or combined viral-bacterial CAP. OBJECTIVE To investigate whether cytokine-based prediction models can be used to differentiate strict viral CAP from other aetiologies at admission. METHODS From 344 hospitalized CAP patients, 104 patients were categorized as viral CAP (n = 17), pneumococcal CAP (n = 48) and combined bacterial-viral CAP (n = 39). IL-6, IL-10, IL-27, IFN-γ and C-reactive protein (CRP) were determined on admission in plasma. Prediction of strict viral aetiology was explored with two multivariate regression models and ROC curves. RESULTS Viral pneumonia was predicted by logistic regression using multiple cytokine levels (IL-6, IL-27 and CRP) with an AUC of 0.911 (95% CI: 0.852-0.971, P < .001). For the same patients the AUC of CRP was 0.813 (95% CI: 0.728-0.898, P < .001). CONCLUSIONS This study demonstrated differences in cytokine expression in selected CAP patients between viral and bacterial aetiology. Prospective validation studies are warranted.
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Affiliation(s)
- Eduard H Burgmeijer
- Department of Pulmonology, North West Hospital Alkmaar, Alkmaar, the Netherlands
| | - Ruud Duijkers
- Department of Pulmonology, North West Hospital Alkmaar, Alkmaar, the Netherlands
| | - René Lutter
- Departments of Respiratory Medicine and Experimental Immunology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Marc J M Bonten
- Department of Molecular Epidemiology of Infectious diseases, Department of Medical Microbiology and Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Valentijn A Schweitzer
- Department of Molecular Epidemiology of Infectious diseases, Department of Medical Microbiology and Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Wim G Boersma
- Department of Pulmonology, North West Hospital Alkmaar, Alkmaar, the Netherlands
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Valade S, Biard L, Lemiale V, Argaud L, Pène F, Papazian L, Bruneel F, Seguin A, Kouatchet A, Oziel J, Rouleau S, Bele N, Razazi K, Lesieur O, Boissier F, Megarbane B, Bigé N, Brulé N, Moreau AS, Lautrette A, Peyrony O, Perez P, Mayaux J, Azoulay E. Severe atypical pneumonia in critically ill patients: a retrospective multicenter study. Ann Intensive Care 2018; 8:81. [PMID: 30105627 PMCID: PMC6089852 DOI: 10.1186/s13613-018-0429-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 08/02/2018] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Chlamydophila pneumoniae (CP) and Mycoplasma pneumoniae (MP) patients could require intensive care unit (ICU) admission for acute respiratory failure. METHODS Adults admitted between 2000 and 2015 to 20 French ICUs with proven atypical pneumonia were retrospectively described. Patients with MP were compared to Streptococcus pneumoniae (SP) pneumonia patients admitted to ICUs. RESULTS A total of 104 patients were included, 71 men and 33 women, with a median age of 56 [44-67] years. MP was the causative agent for 76 (73%) patients and CP for 28 (27%) patients. Co-infection was documented for 18 patients (viruses for 8 [47%] patients). Median number of involved quadrants on chest X-ray was 2 [1-4], with alveolar opacities (n = 61, 75%), interstitial opacities (n = 32, 40%). Extra-pulmonary manifestations were present in 34 (33%) patients. Mechanical ventilation was required for 75 (72%) patients and vasopressors for 41 (39%) patients. ICU length of stay was 16.5 [9.5-30.5] days, and 11 (11%) patients died in the ICU. Compared with SP patients, MP patients had more extensive interstitial pneumonia, fewer pleural effusion, and a lower mortality rate [6 (8%) vs. 17 (22%), p = 0.013]. According MCA analysis, some characteristics at admission could discriminate MP and SP. MP was more often associated with hemolytic anemia, abdominal manifestations, and extensive chest radiograph abnormalities. SP-P was associated with shock, confusion, focal crackles, and focal consolidation. CONCLUSION In this descriptive study of atypical bacterial pneumonia requiring ICU admission, mortality was 11%. The comparison with SP pneumonia identified clinical, laboratory, and radiographic features that may suggest MP or CP pneumonia.
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Affiliation(s)
- S. Valade
- AP-HP, Medical ICU, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France
- UFR de Médecine, University Paris-7 Paris-Diderot, Paris, France
| | - L. Biard
- UFR de Médecine, University Paris-7 Paris-Diderot, Paris, France
- AP-HP, DBIM, Hôpital Saint-Louis, Paris, France
| | - V. Lemiale
- AP-HP, Medical ICU, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France
- UFR de Médecine, University Paris-7 Paris-Diderot, Paris, France
| | - L. Argaud
- Hôpital Edouard Herriot, Service de Réanimation Médicale, Hospices Civils de Lyon, Lyon, France
| | - F. Pène
- AP-HP, Réanimation médicale, Hôpital Cochin, Paris, France
| | - L. Papazian
- Réanimation des Détresses Respiratoires et Infections Sévères, Assistance Publique-Hôpitaux de Marseille, Hôpital Nord, Marseille, France
| | - F. Bruneel
- Service de Réanimation, Centre Hospitalier de Versailles, Le Chesnay, France
| | - A. Seguin
- Department of Medical Intensive Care, CHU de Caen, Caen, France
| | - A. Kouatchet
- Service de Réanimation Médicale et Médecine Hyperbare, Hôpital Angers, Angers, France
| | - J. Oziel
- AP-HP, Medical-Surgical Intensive Care Unit, Avicenne University Hospital, Bobigny, France
| | - S. Rouleau
- Service de Réanimation polyvalente, Angoulême, France
| | - N. Bele
- Intensive Care Unit, Draguignan Hospital, Draguignan, France
| | - K. Razazi
- AP-HP, Groupe Henri Mondor-Albert Chenevier, Service de Réanimation Médicale, Hôpital Henri Mondor, Créteil, France
| | - O. Lesieur
- Service de Réanimation, CH Saint-Louis, La Rochelle, France
| | - F. Boissier
- AP-HP, Réanimation médicale, Hôpital Européen Georges Pompidou, Paris, France
| | - B. Megarbane
- AP-HP, Department of Medical and Toxicological Critical Care, Lariboisière Hospital, Paris, France
| | - N. Bigé
- AP-HP, Medical Intensive Care Unit, Hôpital Saint-Antoine, Paris, France
| | - N. Brulé
- Medical Intensive Care Unit, Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - A. S. Moreau
- Centre de réanimation, Hôpital Salengro, CHU-Lille, Lille, France
| | - A. Lautrette
- Service de Réanimation Médicale Polyvalente, CHU Gabriel Montpied, Clermont-Ferrand, France
| | - O. Peyrony
- AP-HP, Service des urgences, Hôpital Saint-Louis, Paris, France
| | - P. Perez
- Service de Réanimation médicale, Hôpital Brabois, Nancy, France
| | - J. Mayaux
- AP-HP, Pneumology and Critical Care Medicine Department, Universitary Hospital La Pitié Salpêtrière-Charles Foix, Paris, France
| | - E. Azoulay
- AP-HP, Medical ICU, Hôpital Saint-Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France
- UFR de Médecine, University Paris-7 Paris-Diderot, Paris, France
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Galván JM, Rajas O, Aspa J. Review of Non-Bacterial Infections in Respiratory Medicine: Viral Pneumonia. Arch Bronconeumol 2015; 51:590-7. [PMID: 25957460 PMCID: PMC7105177 DOI: 10.1016/j.arbres.2015.02.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 02/23/2015] [Accepted: 02/23/2015] [Indexed: 11/30/2022]
Abstract
Although bacteria are the main pathogens involved in community-acquired pneumonia, a significant number of community-acquired pneumonia are caused by viruses, either directly or as part of a co-infection. The clinical picture of these different pneumonias can be very similar, but viral infection is more common in the pediatric and geriatric populations, leukocytes are not generally elevated, fever is variable, and upper respiratory tract symptoms often occur; procalcitonin levels are not generally affected. For years, the diagnosis of viral pneumonia was based on cell culture and antigen detection, but since the introduction of polymerase chain reaction techniques in the clinical setting, identification of these pathogens has increased and new microorganisms such as human bocavirus have been discovered. In general, influenza virus type A and syncytial respiratory virus are still the main pathogens involved in this entity. However, in recent years, outbreaks of deadly coronavirus and zoonotic influenza virus have demonstrated the need for constant alert in the face of new emerging pathogens. Neuraminidase inhibitors for viral pneumonia have been shown to reduce transmission in cases of exposure and to improve the clinical progress of patients in intensive care; their use in common infections is not recommended. Ribavirin has been used in children with syncytial respiratory virus, and in immunosuppressed subjects. Apart from these drugs, no antiviral has been shown to be effective. Prevention with anti-influenza virus vaccination and with monoclonal antibodies, in the case of syncytial respiratory virus, may reduce the incidence of pneumonia.
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Affiliation(s)
- José María Galván
- Servicio de Medicina Interna, Hospital Universitario de la Princesa, IIS-IP, Madrid, España
| | - Olga Rajas
- Servicio de Neumología, Hospital Universitario de la Princesa, IIS-IP, Madrid, España
| | - Javier Aspa
- Servicio de Neumología, Hospital Universitario de la Princesa, IIS-IP, Madrid, España.
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Abo-Leyah H, Chalmers JD. Middle East respiratory syndrome: the need for better evidence in severe respiratory viral infections. Crit Care Med 2015; 43:1344-6. [PMID: 25978166 DOI: 10.1097/CCM.0000000000001008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Abstract
Although bacteria are the main pathogens involved in community-acquired pneumonia, a significant number of community-acquired pneumonia are caused by viruses, either directly or as part of a co-infection. The clinical picture of these different pneumonias can be very similar, but viral infection is more common in the pediatric and geriatric populations, leukocytes are not generally elevated, fever is variable, and upper respiratory tract symptoms often occur; procalcitonin levels are not generally affected. For years, the diagnosis of viral pneumonia was based on cell culture and antigen detection, but since the introduction of polymerase chain reaction techniques in the clinical setting, identification of these pathogens has increased and new microorganisms such as human bocavirus have been discovered. In general, influenza virus type A and syncytial respiratory virus are still the main pathogens involved in this entity. However, in recent years, outbreaks of deadly coronavirus and zoonotic influenza virus have demonstrated the need for constant alert in the face of new emerging pathogens. Neuraminidase inhibitors for viral pneumonia have been shown to reduce transmission in cases of exposure and to improve the clinical progress of patients in intensive care; their use in common infections is not recommended. Ribavirin has been used in children with syncytial respiratory virus, and in immunosuppressed subjects. Apart from these drugs, no antiviral has been shown to be effective. Prevention with anti-influenza virus vaccination and with monoclonal antibodies, in the case of syncytial respiratory virus, may reduce the incidence of pneumonia.
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Affiliation(s)
- José María Galván
- Servicio de Medicina Interna, Hospital Universitario de la Princesa, IIS-IP, Madrid, España
| | - Olga Rajas
- Servicio de Neumología, Hospital Universitario de la Princesa, IIS-IP, Madrid, España
| | - Javier Aspa
- Servicio de Neumología, Hospital Universitario de la Princesa, IIS-IP, Madrid, España.
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Huijts SM, Boersma WG, Grobbee DE, Gruber WC, Jansen KU, Kluytmans JAJW, Kuipers BAF, Palmen F, Pride MW, Webber C, Bonten MJM. Predicting pneumococcal community-acquired pneumonia in the emergency department: evaluation of clinical parameters. Clin Microbiol Infect 2014; 20:1316-22. [PMID: 24975428 DOI: 10.1111/1469-0691.12740] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/24/2014] [Accepted: 06/25/2014] [Indexed: 11/30/2022]
Abstract
The aim of this study was to quantify the value of clinical predictors available in the emergency department (ED) in predicting Streptococcus pneumoniae as the cause of community-acquired pneumonia (CAP). A prospective, observational, cohort study of patients with CAP presenting in the ED was performed. Pneumococcal aetiology of CAP was based on either bacteraemia, or S. pneumoniae being cultured from sputum, or urinary immunochromatographic assay positivity, or positivity of a novel serotype-specific urinary antigen detection test. Multivariate logistic regression was used to identify independent predictors and various cut-off values of probability scores were used to evaluate the usefulness of the model. Three hundred and twenty-eight (31.0%) of 1057 patients with CAP had pneumococcal CAP. Nine independent predictors for pneumococcal pneumonia were identified, but the clinical utility of this prediction model was disappointing, because of low positive predictive values or a small yield. Clinical criteria have insufficient diagnostic capacity to predict pneumococcal CAP. Rapid antigen detection tests are needed to diagnose S. pneumoniae at the time of hospital admission.
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Affiliation(s)
- S M Huijts
- Julius Center for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, USA
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Elemraid MA, Rushton SP, Thomas MF, Spencer DA, Gennery AR, Clark JE. Utility of inflammatory markers in predicting the aetiology of pneumonia in children. Diagn Microbiol Infect Dis 2014; 79:458-62. [PMID: 24857169 DOI: 10.1016/j.diagmicrobio.2014.04.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/18/2014] [Accepted: 04/20/2014] [Indexed: 01/09/2023]
Abstract
We aimed to investigate the diagnostic value of applying cut-off levels of inflammatory markers and to develop a prediction model for differentiation between bacterial and viral infections in paediatric community-acquired pneumonia based on C-reactive protein (CRP), neutrophil, and white cell counts (WCC). Amongst 401 children, those with bacterial pneumonia were older than those with viral pneumonia (P<0.001). Compared to viral, bacterial infections had a higher median CRP level (P<0.001), whereas WCC and neutrophil count were not different. Bacterial infections were associated with higher CRP >80 mg/L than viral infections (P=0.001), but levels <20 mg/L were not discriminatory (P=0.254). Receiver operating characteristic curve of the model for differentiating bacterial from viral pneumonia based on age, CRP, and neutrophil count produced area under the curve of 0.894 with 75.7% sensitivity and 89.4% specificity. This aetiological discriminant prediction model is a potentially useful tool in clinical management and epidemiological studies of paediatric pneumonia.
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Affiliation(s)
- Mohamed A Elemraid
- Department of Paediatric Infectious Disease and Immunology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK; Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE1 7RU, UK.
| | - Stephen P Rushton
- Biological, Clinical and Environmental Systems Modelling Group, School of Biology, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Matthew F Thomas
- Biological, Clinical and Environmental Systems Modelling Group, School of Biology, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; Department of Respiratory Paediatrics, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK
| | - David A Spencer
- Department of Respiratory Paediatrics, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK
| | - Andrew R Gennery
- Department of Paediatric Infectious Disease and Immunology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK; Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Julia E Clark
- Department of Paediatric Infectious Disease, Royal Children's Hospital, Brisbane, Queensland 4029, Australia
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Liu YF, Gao Y, Chen MF, Cao B, Yang XH, Wei L. Etiological analysis and predictive diagnostic model building of community-acquired pneumonia in adult outpatients in Beijing, China. BMC Infect Dis 2013; 13:309. [PMID: 23834931 PMCID: PMC3728139 DOI: 10.1186/1471-2334-13-309] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 07/05/2013] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Etiological epidemiology and diagnosis are important issues in adult community-acquired pneumonia (CAP), and identifying pathogens based on patient clinical features is especially a challenge. CAP-associated main pathogens in adults include viruses as well as bacteria. However, large-scale epidemiological investigations of adult viral CAP in China are still lacking. In this study, we analyzed the etiology of adult CAP in Beijing, China and constructed diagnostic models based on combinations of patient clinical factors. METHODS A multicenter cohort was established with 500 adult CAP outpatients enrolled in Beijing between November 2010 to October 2011. Multiplex and quantitative real-time fluorescence PCR were used to detect 15 respiratory viruses and mycoplasma pneumoniae, respectively. Bacteria were detected with culture and enzyme immunoassay of the Streptococcus pneumoniae urinary antigen. Univariate analysis, multivariate analysis, discriminatory analysis and Receiver Operating Characteristic (ROC) curves were used to build predictive models for etiological diagnosis of adult CAP. RESULTS Pathogens were detected in 54.2% (271/500) of study patients. Viruses accounted for 36.4% (182/500), mycoplasma pneumoniae for 18.0% (90/500) and bacteria for 14.4% (72/500) of the cases. In 182 of the patients with viruses, 219 virus strains were detected, including 166 single and 53 mixed viral infections. Influenza A virus represented the greatest proportion with 42.0% (92/219) and 9.1% (20/219) in single and mixed viral infections, respectively. Factors selected for the predictive etiological diagnostic model of viral CAP included cough, dyspnea, absence of chest pain and white blood cell count (4.0-10.0) × 10(9)/L, and those of mycoplasma pneumoniae CAP were being younger than 45 years old and the absence of a coexisting disease. However, these models showed low accuracy levels for etiological diagnosis (areas under ROC curve for virus and mycoplasma pneumoniae were both 0.61, P < 0.05). CONCLUSIONS Greater consideration should be given to viral and mycoplasma pneumoniae infections in adult CAP outpatients. While predictive etiological diagnostic models of viral and mycoplasma pneumoniae based on combinations of demographic and clinical factors may provide indications of etiology, diagnostic confirmation of CAP remains dependent on laboratory pathogen test results.
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Affiliation(s)
- Ya-Fen Liu
- Peking University People's Hospital, Department of Infectious Disease, Peking University Hepatology Institute, Beijing 100044, P R China
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LUI G, IP M, LEE N, RAINER TH, MAN SY, COCKRAM CS, ANTONIO GE, NG MH, CHAN MH, CHAU SS, MAK P, CHAN PK, AHUJA AT, SUNG JJ, HUI DS. Role of ‘atypical pathogens’ among adult hospitalized patients with community-acquired pneumonia. Respirology 2009; 14:1098-105. [DOI: 10.1111/j.1440-1843.2009.01637.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lasocki S, Scanvic A, Le Turdu F, Restoux A, Mentec H, Bleichner G, Sollet JP. Evaluation of the Binax NOW Streptococcus pneumoniae urinary antigen assay in intensive care patients hospitalized for pneumonia. Intensive Care Med 2006; 32:1766-72. [PMID: 16957905 DOI: 10.1007/s00134-006-0329-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2005] [Accepted: 07/21/2006] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To evaluate the diagnostic performance of Binax Now S. pneumoniae urinary antigen rapid immunochromatographic membrane test (ICT) for patients with suspicion of community-acquired pneumonia hospitalized in intensive care and to assess the impact of prior antibiotics on its diagnostic performance. DESIGN AND SETTING Retrospective study in a medicosurgical ICU in a 700-bed general hospital. PATIENTS Charts of patients with ICT performed (result blinded) were reviewed between May 2002 and July 2004. ICT has been performed in 140 of the 1,006 patients hospitalized in the unit; two-thirds had received antibiotics prior to admission. MEASUREMENTS AND RESULTS Diagnosis of pneumonia was made according to usual criteria. All patients had at least one microbiological test. Pneumonia diagnosis confirmed in 108 patients including 32 pneumococcal. ICT was positive in 23 of 32 patients with pneumococcal pneumonia, in 11 of 108 without, and in none of the 32 patients without pneumonia, resulting in sensitivity, specificity, and positive and negative predictive values of, respectively: 72%, 90%, 68% and 92%. Positive likelihood ratios were comparable among patients with or without prior antibiotics (respectively 6 and 12 for 7 in the overall population). CONCLUSIONS This first clinical evaluation of ICT in intensive care patients hospitalized for suspicion of community-acquired pneumonia, demonstrated performance in accordance with published data even in the case of prior antibiotics. Its clinical interest and impact on antibiotics policy remain to be refined.
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Affiliation(s)
- Sigismond Lasocki
- Service de Réanimation Chirurgicale, CHU Bichat-Claude Bernard, 46 rue Henri Huchard, 75877, Paris Cedex 18, France.
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Abstract
The presence of atypical pathogens in community-acquired pneumonia is difficult to diagnose; culture is time-consuming and requires considerable expertise and serological identification may be inaccurate. Nevertheless, the increasing importance of atypical organisms has been recognised in recent years. Variations in aetiology have been detected in different geographical regions and different patient populations. The season of the year may also influence aetiology, and some infections follow a cyclical pattern. When an atypical pathogen is suspected, a macrolide antibiotic is an appropriate choice as, in addition to activity against these organisms, they are usually effective against the Gram-positive and Gram-negative respiratory pathogens implicated in community-acquired pneumonia.
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Affiliation(s)
- D Honeybourne
- Department of Respiratory Medicine, Birmingham Heartlands Hospital, Birmingham B9 5SS, UK.
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Klugman KP, Feldman C. STRETOCOCCUS PNEUMONIAE RESPIRATORY TRACT INFECTION*. Infectious Diseases in Clinical Practice 2002; 11:76-83. [DOI: 10.1097/00019048-200202000-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
This review describes recent contributions to our understanding of pneumococcal pneumonia. Two genes have been described that encode enzymes involved with the biosynthesis of muropeptides. These enzymes may be novel antibiotic targets. The clinical impact of increasing antibiotic resistance on the treatment of pneumonia is the particular focus of the review. As resistant strains are more commonly associated with severe infections in patients with underlying disease, the interpretation of an association of resistance with poor clinical outcome is complicated.
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Affiliation(s)
- K P Klugman
- Wits/MRC Pneumococcal Diseases Research Unit, School of Pathology, South African Institute for Medical Research and University of the Witwatersrand, South Africa.
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