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Laupland KB, Edwards F, Harris PNA. Proteus species bloodstream infections: Comparative epidemiology of three species. Diagn Microbiol Infect Dis 2024; 109:116286. [PMID: 38574445 DOI: 10.1016/j.diagmicrobio.2024.116286] [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: 04/04/2023] [Revised: 03/21/2024] [Accepted: 03/25/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Although Proteus species are occasional causes of serious infections, their epidemiology has not been well defined. The objective was to describe the overall and species-specific occurrence and determinants of Proteus species bloodstream infection (BSI) in a large Australian population. METHODS All Queensland residents with Proteus species BSI identified within the publicly funded healthcare system between 2000 and 2019 were included. RESULTS A total of 2,143 incident episodes of Proteus species BSI were identified among 2,079 Queensland residents. The prevalence of comorbid illness differed with higher Charlson comorbidity scores observed with P. penneri and P. vulgaris, and higher prevalence of liver disease with P. penneri, higher comorbid cancer with P. vulgaris, and lower diabetes and renal disease prevalence with P. mirabilis BSIs. CONCLUSION This study provides novel information on the epidemiology of Proteus species BSI.
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Affiliation(s)
- Kevin B Laupland
- Queensland University of Technology (QUT), Brisbane, Queensland, Australia; Department of Intensive Care Services, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia.
| | - Felicity Edwards
- Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Patrick N A Harris
- University of Queensland, Faculty of Medicine, UQ Center for Clinical Research, Brisbane, Queensland, Australia; Department of Microbiology, Pathology Queensland, Brisbane, Queensland, Australia
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Laupland KB, Pasquill K, Steele L, Parfitt EC. Population-based study of Morganella-Proteus-Providencia group bloodstream infections. JOURNAL OF THE ASSOCIATION OF MEDICAL MICROBIOLOGY AND INFECTIOUS DISEASE CANADA = JOURNAL OFFICIEL DE L'ASSOCIATION POUR LA MICROBIOLOGIE MEDICALE ET L'INFECTIOLOGIE CANADA 2023; 8:134-140. [PMID: 38250289 PMCID: PMC10795700 DOI: 10.3138/jammi-2022-0038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 01/13/2023] [Indexed: 01/23/2024]
Abstract
Background There is a paucity of studies investigating the population-based epidemiology of Morganella-Proteus-Providencia (MPP) group infections. Our objective was to determine the incidence, risk factors, and outcome of MPP group bloodstream infections (BSI), and explore species-specific differences. Methods Population-based surveillance was conducted in the western interior of British Columbia, Canada, between April 1, 2010 and March 30, 2020. Results Sixty-two incident MPP group BSI occurred for an annual incidence of 3.4 per 100,000 residents; rates for Morganella morganii, Proteus mirabilis, and Providencia species were 0.5, 2.6, and 0.3 per 100,000 population, respectively. The median year of age was 72.5 and was different (p = 0.03) among the groups. Most (92%) MPP group BSIs were of community-onset. Significant differences were observed in the distribution of clinical focus of infection, with most notably 81% of P. mirabilis BSI due to genitourinary focus as compared to 60% and 22% for Providencia species and M. morganii, respectively. Comorbid illnesses that increased the risk for development of MPP group BSI (incidence rate ratio; 95% CI) were HIV infection (37.0; 4.4-139.6), dementia (11.5; 6.1-20.7), cancer (6.4; 3.2-11.9), stroke 6.5 (2.8-13.3), and diabetes 2.7 (1.3-5.0). Thirteen, one, and none of the cases with P. mirabilis, M. morganii, and Providencia species BSI died within 30 days of index culture for respective all cause case-fatalities of 27%, 11%, and 0% (p = 0.1). Conclusions Although collectively responsible for a substantial burden of illness, the epidemiology of MPP group BSI varies significantly by species.
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Affiliation(s)
- Kevin B Laupland
- Department of Intensive Care Services, Royal Brisbane and Women’s Hospital, Brisbane, Queensland, Australia
- Department of Medicine, Royal Inland Hospital, Kamloops, British Columbia, Canada
- Faculty of Health, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Kelsey Pasquill
- Department of Pathology and Laboratory Medicine, Royal Inland Hospital, Kamloops, British Columbia, Canada
| | - Lisa Steele
- Department of Pathology and Laboratory Medicine, Royal Inland Hospital, Kamloops, British Columbia, Canada
| | - Elizabeth C Parfitt
- Faculty of Health, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
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Sun L, He J, Shi X, Hu L, Yin Y, Yu Y, Hua X. Genotypic characterization of a Proteus mirabilis strain harboring bla KPC-2 on the IncN plasmid isolated from a patient with bloodstream infection in China. J Infect Public Health 2023; 16:1033-1036. [PMID: 37182289 DOI: 10.1016/j.jiph.2023.04.020] [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: 12/02/2022] [Revised: 04/10/2023] [Accepted: 04/30/2023] [Indexed: 05/16/2023] Open
Abstract
BACKGROUND Carbapenemase is the predominant enzyme in the mechanism leading to Enterobacterales resistance to carbapenems, and the rapid spread of the blaKPC gene is a major public health concern. Here, we describe a carbapenem-resistant Proteus mirabilis strain XH983, which harbored a blaKPC-2-producing IncN plasmid, isolated from a bloodstream infection. METHODS Whole-genome sequencing and bioinformatics analysis were performed to assess the genetic environment of P. mirabilis XH983. Conjugation and transfer experiments were performed and the corresponding strains were confirmed by antimicrobial susceptibility testing. Phylogenetic and comparative genomic analysis were performed to explore the characteristics of carbapenem-resistant P. mirabilis isolates worldwide. RESULTS P. mirabilis XH983 was isolated from the blood of a patient in Hangzhou, China. The genome of XH983 contained one 4128,916 bp circular chromosome and one 24,225 bp IncN plasmid harboring blaKPC-2. P. mirabilis XH983 had multiple resistance genes, conferring resistance to aminoglycosides [aph(3')-Ia, aph(3'')-Ib, aph(6)-Id, aac(3)-IId, aadA5, aadA1], β-lactams (blaKPC-2, blaTEM-1B), phenicol (cat, catA1), sulphonamide/trimethoprim (drfA1, drfA17, sul1, sul2) and tetracycline [tet(J)]. The phylogenetic tree showed that XH983 was present in a cluster of 30 isolates, all of which carried blaKPC-2 and most of them came from the same hospital as XH983, indicating the clonal spread of the cluster. CONCLUSION We characterized carbapenem-resistant P. mirabilis clinical isolate XH983. The genome sequence of P. mirabilis XH983 provides information about resistance mechanisms of P. mirabilis carrying the blaKPC-2 plasmid and the potential spread of blaKPC-2.
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Affiliation(s)
- Long Sun
- Department of Clinical Laboratory, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou 310051, Zhejiang, China
| | - Jintao He
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang, China; Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xinyan Shi
- Department of Clinical Laboratory, Hangzhou Women's Hospital (Hangzhou Maternity and Child Health Care Hospital), Hangzhou 310051, Zhejiang, China
| | - Lihua Hu
- Department of Critical Care Medicine, Hospital of Zhejiang people's armed police (PAP), Hangzhou, Zhejiang, China
| | - Yiping Yin
- Department of Hospital-acquired infection control, Hospital of Zhejiang people's armed police (PAP), Hangzhou, Zhejiang, China
| | - Yunsong Yu
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang, China; Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
| | - Xiaoting Hua
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou, Zhejiang, China; Regional Medical Center for National Institute of Respiratory Diseases, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
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Macias-Valcayo A, Aguilera-Correa JJ, Broncano A, Parron R, Auñon A, Garcia-Cañete J, Blanco A, Esteban J. Comparative In Vitro Study of Biofilm Formation and Antimicrobial Susceptibility in Gram-Negative Bacilli Isolated from Prosthetic Joint Infections. Microbiol Spectr 2022; 10:e0085122. [PMID: 35876589 PMCID: PMC9430931 DOI: 10.1128/spectrum.00851-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 07/06/2022] [Indexed: 11/26/2022] Open
Abstract
Prosthetic joint infections (PJIs) are typically caused by microorganisms that grow in biofilms. Traditional antimicrobial susceptibility tests are based on the study of planktonic bacteria that might lead to missing the biofilm behavior and to a treatment failure. This study was designed to analyze the antimicrobial susceptibility of clinical Gram-negative bacilli (GNB) isolates from PJIs in planktonic and sessile states and the possible relationship between antimicrobial resistance and biofilm formation. A total of 46 clinical isolates from patients with PJIs (mainly hip and knee prostheses) plus three GNB ATCC isolates were studied. The Minimal Inhibitory Concentration (MIC), minimal bactericidal concentration (MBC), minimal biofilm inhibitory concentration (MBIC), and minimal biofilm eradication concentration (MBEC) were assessed using a previously published methodology. Almost all of the GNB clinical isolates tested were biofilm forming. Pseudomonas aeruginosa was the largest biofilm-forming species. A comparison of MBIC90 versus MIC90 shows an increase higher than 1- to -2-fold dilutions in most antimicrobials studied, and MBEC90 was significantly higher than MIC90, becoming resistant to all the antimicrobial drugs tested. Higher biofilm production values were obtained in antibiotic-susceptible Escherichia coli in comparison to their resistant counterparts. However, regarding the relationships between antimicrobial resistance and biofilm formation, our analysis showed that each strain differed. A high antimicrobial resistance rate was found among the GNB studied. Moreover, almost all bacterial isolates were in vitro biofilm formers. Although there was no significant association between biofilm and antibiotic resistance, multidrug-resistant isolates were found to be greater biofilm formers than non-multidrug-resistant isolates. IMPORTANCE This study is the first one to analyze a high number of isolates of Gram-negative bacilli that are the cause of prosthetic joint infection. The analysis includes biofilm development and antimicrobial susceptibility testing of both planktonic and sessile bacteria. The obtained results support the clinical knowledge about the treatment of these bacteria when biofilms are involved.
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Affiliation(s)
- Alicia Macias-Valcayo
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - John-Jairo Aguilera-Correa
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Centre for Biomedical Research Network in Infectious Diseases (CIBERINFEC), CIBER de Enfermedades Infecciosas, Madrid, Spain
| | - Antonio Broncano
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Raul Parron
- Centre for Biomedical Research Network in Infectious Diseases (CIBERINFEC), CIBER de Enfermedades Infecciosas, Madrid, Spain
- Department of Orthopaedic Surgery, Fundación Jiménez Díaz, Madrid, Spain
| | - Alvaro Auñon
- Centre for Biomedical Research Network in Infectious Diseases (CIBERINFEC), CIBER de Enfermedades Infecciosas, Madrid, Spain
- Department of Orthopaedic Surgery, Fundación Jiménez Díaz, Madrid, Spain
| | | | - Antonio Blanco
- Centre for Biomedical Research Network in Infectious Diseases (CIBERINFEC), CIBER de Enfermedades Infecciosas, Madrid, Spain
- Department of Internal Medicine-Emergencies, Fundación Jiménez Díaz, Madrid, Spain
| | - Jaime Esteban
- Department of Clinical Microbiology, Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Centre for Biomedical Research Network in Infectious Diseases (CIBERINFEC), CIBER de Enfermedades Infecciosas, Madrid, Spain
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Minagawa T, Ohara T, Oizumi T, Takeda M, Hiranuma W, Matsuoka T, Shimizu T, Kawamoto S. Infective Endocarditis with a Left Ventricular Pseudoaneurysm Caused by Proteus mirabilis: A Case Report. J Cardiol Cases 2022; 25:79-82. [PMID: 35079303 DOI: 10.1016/j.jccase.2021.06.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 06/24/2021] [Accepted: 06/29/2021] [Indexed: 11/19/2022] Open
Abstract
Infective endocarditis (IE) due to Proteus mirabilis is rare. Given that cases of IE complicated with a left ventricular pseudoaneurysm (LVP) caused by P. mirabilis have not been reported thus far, here we report a case of IE complicated with an LVP caused by P. mirabilis. An 83-year-old woman was admitted to our hospital for urinary tract infection, and P. mirabilis was detected in blood cultures. Transesophageal echocardiography and electrocardiogram-gated computed tomography revealed mitral regurgitation and a mass protruding from the mitral annulus on the dorsal side. We made a diagnosis of an LVP due to IE and performed mitral valve replacement and patch plasty of the mitral annulus. Thus, P. mirabilis can cause bloodstream infections and lead to IE, which may result in LVPs. <Learning objective: Proteus mirabilis commonly causes urinary tract infection in older adults and is also likely to cause bloodstream infections; however, it is rarely known to be the causative agent of infective endocarditis and left ventricular pseudoaneurysms. However, in clinical settings, clinicians should be aware that P. mirabilis can also cause IE with annular extension.>.
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Affiliation(s)
- Tadanori Minagawa
- Division of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takahiro Ohara
- Division of Community Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tomoya Oizumi
- Division of Emergency and Disaster Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Miki Takeda
- Division of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Wakiko Hiranuma
- Division of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takayuki Matsuoka
- Division of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Takuya Shimizu
- Division of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Shunsuke Kawamoto
- Division of Cardiovascular Surgery, Tohoku Medical and Pharmaceutical University, Sendai, Japan
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Santella B, Folliero V, Pirofalo GM, Serretiello E, Zannella C, Moccia G, Santoro E, Sanna G, Motta O, De Caro F, Pagliano P, Capunzo M, Galdiero M, Boccia G, Franci G. Sepsis-A Retrospective Cohort Study of Bloodstream Infections. Antibiotics (Basel) 2020; 9:antibiotics9120851. [PMID: 33260698 PMCID: PMC7760988 DOI: 10.3390/antibiotics9120851] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/08/2020] [Accepted: 11/25/2020] [Indexed: 12/29/2022] Open
Abstract
Bloodstream infections (BSIs) are among the leading causes of morbidity and mortality worldwide, among infectious diseases. Local knowledge of the main bacteria involved in BSIs and their associated antibiotic susceptibility patterns is essential to rationalize the empiric antimicrobial therapy. The aim of this study was to define the incidence of infection and evaluate the antimicrobial resistance profile of the main pathogens involved in BSIs. This study enrolled patients of all ages and both sexes admitted to the University Hospital “San Giovanni di Dio e Ruggi d’Aragona”, Salerno, Italy between January 2015 to December 2019. Bacterial identification and antibiotic susceptibility testing were performed with Vitek 2. A number of 3.949 positive blood cultures were included out of 24,694 total blood cultures from 2015 to 2019. Coagulase-negative staphylococci (CoNS) were identified as the main bacteria that caused BSI (17.4%), followed by Staphylococcus aureus (12.3%), Escherichia coli (10.9%), and Klebsiella pneumoniae (9.4%). Gram-positive bacteria were highly resistant to Penicillin G and Oxacillin, while Gram-negative strains to Ciprofloxacin, Cefotaxime, Ceftazidime, and Amoxicillin-clavulanate. High susceptibility to Vancomycin, Linezolid, and Daptomycin was observed among Gram-positive strains. Fosfomycin showed the best performance to treatment Gram-negative BSIs. Our study found an increase in resistance to the latest generation of antibiotics over the years. This suggests an urgent need to improve antimicrobial management programs to optimize empirical therapy in BSI.
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Affiliation(s)
- Biagio Santella
- Section of Microbiology and Virology, University Hospital “Luigi Vanvitelli”, 80138 Naples, Italy; (B.S.); (E.S.); (M.G.)
| | - Veronica Folliero
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (V.F.); (C.Z.)
| | - Gerarda Maria Pirofalo
- Dai Dipartimento Di Igiene Sanitaria e Medicina Valutativa U.O.C. Patologia Clinica E Microbiologica, Azienda Ospedaliero-Universitaria S. Giovanni di Dio e Ruggi D’Aragona Scuola Medica Salernitana, Largo Città di Ippocrate, 84131 Salerno, Italy; (G.M.P.); (F.D.C.); (M.C.)
| | - Enrica Serretiello
- Section of Microbiology and Virology, University Hospital “Luigi Vanvitelli”, 80138 Naples, Italy; (B.S.); (E.S.); (M.G.)
| | - Carla Zannella
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (V.F.); (C.Z.)
| | - Giuseppina Moccia
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
| | - Emanuela Santoro
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
| | - Giuseppina Sanna
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, Monserrato, 09042 Cagliari, Italy;
| | - Oriana Motta
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
| | - Francesco De Caro
- Dai Dipartimento Di Igiene Sanitaria e Medicina Valutativa U.O.C. Patologia Clinica E Microbiologica, Azienda Ospedaliero-Universitaria S. Giovanni di Dio e Ruggi D’Aragona Scuola Medica Salernitana, Largo Città di Ippocrate, 84131 Salerno, Italy; (G.M.P.); (F.D.C.); (M.C.)
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
| | - Pasquale Pagliano
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
| | - Mario Capunzo
- Dai Dipartimento Di Igiene Sanitaria e Medicina Valutativa U.O.C. Patologia Clinica E Microbiologica, Azienda Ospedaliero-Universitaria S. Giovanni di Dio e Ruggi D’Aragona Scuola Medica Salernitana, Largo Città di Ippocrate, 84131 Salerno, Italy; (G.M.P.); (F.D.C.); (M.C.)
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, Monserrato, 09042 Cagliari, Italy;
| | - Massimiliano Galdiero
- Section of Microbiology and Virology, University Hospital “Luigi Vanvitelli”, 80138 Naples, Italy; (B.S.); (E.S.); (M.G.)
- Department of Experimental Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (V.F.); (C.Z.)
| | - Giovanni Boccia
- Dai Dipartimento Di Igiene Sanitaria e Medicina Valutativa U.O.C. Patologia Clinica E Microbiologica, Azienda Ospedaliero-Universitaria S. Giovanni di Dio e Ruggi D’Aragona Scuola Medica Salernitana, Largo Città di Ippocrate, 84131 Salerno, Italy; (G.M.P.); (F.D.C.); (M.C.)
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
- Correspondence: (G.B.); (G.F.)
| | - Gianluigi Franci
- Dai Dipartimento Di Igiene Sanitaria e Medicina Valutativa U.O.C. Patologia Clinica E Microbiologica, Azienda Ospedaliero-Universitaria S. Giovanni di Dio e Ruggi D’Aragona Scuola Medica Salernitana, Largo Città di Ippocrate, 84131 Salerno, Italy; (G.M.P.); (F.D.C.); (M.C.)
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy; (G.M.); (E.S.); (O.M.); (P.P.)
- Correspondence: (G.B.); (G.F.)
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Ioannou P, Vougiouklakis G. Infective endocarditis by Proteus species: a systematic review. Germs 2020; 10:229-239. [PMID: 33134201 DOI: 10.18683/germs.2020.1209] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 01/04/2023]
Abstract
Proteus spp. are members of the Enterobacteriaceae family and are Gram-negative, rod-shaped bacteria known to mainly cause urinary tract infections (UTIs) in humans. However, even though scarce evidence exists suggesting their potential to cause infective endocarditis (IE), a study summarizing the existing evidence is lacking. The purpose of this study was to systemically review all published cases of IE by Proteus species in the literature. A systematic review of PubMed, Scopus and Cochrane Library (through 5th May 2020) for studies providing epidemiological, clinical and microbiological data as well as data on treatment and outcomes of IE by Proteus species was performed. A total of 16 studies, containing data of 16 patients, were included. A prosthetic valve was present in 25%, while the most common causative pathogen was P. mirabilis. Aortic valve was the most common infected site in 33.3%, followed by mitral valve in 26.7%. Diagnosis was set with transesophageal echocardiography in 37.5%, and transthoracic echocardiography in 25%, while the diagnosis was set at autopsy in 25%. Fever and sepsis were present in 100% and 84.6%, respectively. Aminoglycosides and cephalosporins were the most common antimicrobials used for treatment. Clinical cure was noted in 62.5%, while overall mortality was 43.8%. This systematic review describes IE by Proteus species in detail and provides information on epidemiology, clinical presentation, treatment and outcomes.
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Affiliation(s)
- Petros Ioannou
- MD, MSc, PhD, Department of Internal Medicine & Infectious Diseases, University Hospital of Heraklion, Stavrakia and Voutes crossroad, Heraklion, PC 71110, Crete, Greece
| | - Georgios Vougiouklakis
- Department of Internal Medicine & Infectious Diseases, University Hospital of Heraklion, Stavrakia and Voutes crossroad, Heraklion, PC 71110, Crete, Greece
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