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Kitagawa H, Tadera K, Omori K, Nomura T, Shigemoto N, Ohge H. A case of bacteremia caused by Dialister micraerophilus with Enterocloster clostridioformis and Eggerthella lenta in a patient with pyometra. BMC Infect Dis 2024; 24:128. [PMID: 38267864 PMCID: PMC10809547 DOI: 10.1186/s12879-024-08999-6] [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: 08/02/2023] [Accepted: 01/09/2024] [Indexed: 01/26/2024] Open
Abstract
BACKGROUND Infection by Dialister micraerophilus, an obligate anaerobic gram-negative bacillus, has rarely been described, and its clinical characteristics remain unclear. CASE PRESENTATION We report a case of bacteremia caused by D. micraerophilus, Enterocloster clostridioformis, and Eggerthella lenta in a 47-year-old woman, associated with pyometra. D. micraerophilus was identified using 16S rRNA gene sequencing and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. D. micraerophilus was detected by polymerase chain reaction using D. micraerophilus-specific primers and E. clostridioformis and E. lenta was isolated from the drainage pus sample obtained from the pyometra uterus. The patient achieved a cure after abscess drainage and 2-week antibiotic treatment. CONCLUSIONS To the best of our knowledge, this is the first report of D. micraerophilus bacteremia. D. micraerophilus may be associated with gynecological infections. Clinicians should consider both oral and gynecological sites when searching to identify the focus of D. micraerophilus infection.
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Affiliation(s)
- Hiroki Kitagawa
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan.
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University , Hiroshima, Japan.
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan.
| | - Kayoko Tadera
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
- Section of Clinical Laboratory, Division of Clinical Support, Hiroshima University Hospital, Hiroshima, Japan
- Division of Laboratory Medicine, Hiroshima University Hospital, Hiroshima, Japan
| | - Keitaro Omori
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
| | - Toshihito Nomura
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
| | - Norifumi Shigemoto
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University , Hiroshima, Japan
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
- Translational Research Center, Hiroshima University, Hiroshima, Japan
| | - Hiroki Ohge
- Department of Infectious Diseases, Hiroshima University Hospital, Hiroshima, Japan
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
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2
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Ahlström MG, Antsupova VS, Pedersen M, Johansen HK, Hansen DS, Knudsen IJD. A Dedicated Mycosis Flask Increases the Likelihood of Identifying Candidemia Sepsis. J Fungi (Basel) 2023; 9:jof9040441. [PMID: 37108896 PMCID: PMC10146598 DOI: 10.3390/jof9040441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 04/09/2023] Open
Abstract
Introduction: Candidemia is a severe condition associated with high mortality, and fungi are often not covered by empiric antimicrobial regimes for sepsis. Therefore, the shortest possible time to detection of yeast in the blood is of the essence. Materials and methods: We performed a cohort study of blood culture flasks drawn from patients aged 18 or older in the capital region of Denmark. In 2018 a blood cultures set consisted of two aerobic and two anaerobic flasks. This was changed in 2020 to two aerobic, one anaerobic, and one mycosis flask. We used time-to-event statistics to model time to positivity and compared 2018 with 2020; further, we stratified analyses on the blood culture system used (BacTAlert™ vs. BACTEC™) and high-risk vs. low-risk departments. Results: We included 175,416 blood culture sets and 107,077 unique patients. We found an absolute difference in the likelihood of identifying fungi in a blood culture set of 1.2 (95% CI: 0.72; 1.6) pr. 1.000 blood culture sets corresponding to the number needed to treat 853 (617; 1382). In high-risk departments, the absolute difference was profound, whereas it was negligible and statistically non-significant in low-risk departments 5.2 (95% CI: 3.4; 7.1) vs. 0.16 (−0.17; 0.48) pr. 1.000 blood culture sets. Conclusions: We found that including a mycosis flask in a blood culture set increases the likelihood of identifying candidemia. The effect was mainly seen in high-risk departments.
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Affiliation(s)
- Magnus G. Ahlström
- Department of Clinical Microbiology, Herlev & Gentofte Hospital, 2730 Herlev, Denmark
| | - Valeria S. Antsupova
- Department of Clinical Microbiology, Herlev & Gentofte Hospital, 2730 Herlev, Denmark
| | - Michael Pedersen
- Department of Clinical Microbiology, Amager & Hvidovre Hospital, 2650 Hvidovre, Denmark
| | - Helle Krogh Johansen
- Department of Clinical Microbiology, Rigshospitalet, 2100 Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, 1165 Copenhagen, Denmark
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3
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Technical challenges for complete implementation of automated growth-based methods for microbiological examination of advanced therapy medicinal products. What's wrong with Candida albicans? Cytotherapy 2022; 24:320-333. [DOI: 10.1016/j.jcyt.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 11/22/2022]
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4
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Nygren D, Oldberg K, Holm K. Short blood culture time-to-positivity in Fusobacterium necrophorum bacteremia is associated with Lemierre's syndrome. Anaerobe 2021; 73:102474. [PMID: 34758377 DOI: 10.1016/j.anaerobe.2021.102474] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 09/29/2021] [Accepted: 11/02/2021] [Indexed: 11/01/2022]
Abstract
The usefulness of blood culture time-to-positivity (TTP) in the diagnosis of endovascular infections has previously been shown. Here, we investigated TTP in 41 patients with F. necrophorum bacteraemia and found an association between short TTP and Lemierre's syndrome (p = 0.026).
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Affiliation(s)
- David Nygren
- Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden.
| | - Karl Oldberg
- Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden; Clinical Microbiology, Labmedicin, Region Skåne, Lund, Sweden
| | - Karin Holm
- Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden
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5
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Legaria MC, Nastro M, Camporro J, Heger F, Barberis C, Stecher D, Rodriguez CH, Vay CA. Peptostreptococcus anaerobius: Pathogenicity, identification, and antimicrobial susceptibility. Review of monobacterial infections and addition of a case of urinary tract infection directly identified from a urine sample by MALDI-TOF MS. Anaerobe 2021; 72:102461. [PMID: 34626800 DOI: 10.1016/j.anaerobe.2021.102461] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/20/2021] [Accepted: 09/24/2021] [Indexed: 12/17/2022]
Abstract
Peptostreptococcus anaerobius is a gram-positive anaerobic coccus (GPAC) found in the gastrointestinal and vaginal microbiota. The organism is mainly found in polymicrobial and scarcely in monobacterial infections such as prosthetic and native endocarditis. Anaerobic bacteria have rarely been reported as the cause of urinary tract infection (UTI). Although GPAC are susceptible to most antimicrobials used against anaerobic infections, P. anaerobius has shown to be more resistant. Herein, we report a case of UTI caused by P. anaerobius from a 62-year-old man with a history of urological disease. Surprisingly, the microorganism was directly identified by Matrix-Assisted Laser Desorption-Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) from the urine sample. The isolate was successfully identified by phenotypic methods, MALDI-TOF MS, and 16S rRNA gene sequencing. P. anaerobius showed no β-lactamase-producing activity, was resistant to penicillin, ampicillin, ciprofloxacin and levofloxacin, and displayed intermediate susceptibility to ampicillin-sulbactam and amoxicillin-clavulanic acid. Successful treatment was achieved with oral amoxicillin-clavulanic acid. Antimicrobial susceptibility testing (AST) should be performed on P. anaerobius isolates due to their unpredictable AST patterns and because empirically administered antimicrobial agents may not be active. This report shows that MALDI-TOF MS, directly used in urine specimens, may be a quick option to diagnose UTI caused by P. anaerobius or other anaerobic bacteria. This review is a compilation of monobacterial infections caused by P. anaerobius published in the literature, their pathogenicity, identification, and data about the antimicrobial susceptibility of P. anaerobius.
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Affiliation(s)
- M C Legaria
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, Buenos Aires, Argentina.
| | - M Nastro
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, INFIBIOC, Buenos Aires, Argentina
| | - J Camporro
- Universidad de Buenos Aires. Facultad de Medicina, Hospital de Clínicas José de San Martín, Servicio de Infectología, Buenos Aires, Argentina
| | - F Heger
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, Buenos Aires, Argentina
| | - C Barberis
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, INFIBIOC, Buenos Aires, Argentina
| | - D Stecher
- Universidad de Buenos Aires. Facultad de Medicina, Hospital de Clínicas José de San Martín, Servicio de Infectología, Buenos Aires, Argentina
| | - C H Rodriguez
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, INFIBIOC, Buenos Aires, Argentina
| | - C A Vay
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Hospital de Clínicas José de San Martín, Departamento de Bioquímica Clínica, Cátedra de Microbiología Clínica, Laboratorio de Bacteriología, INFIBIOC, Buenos Aires, Argentina
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Direct Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry Testing from Positive Blood Cultures for Rapid Identification of Bloodstream Infection-Causing Anaerobic Bacteria. J Clin Microbiol 2021; 59:e0052121. [PMID: 33883181 DOI: 10.1128/jcm.00521-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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7
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Epidemiology and microbiological features of anaerobic bacteremia in two French University hospitals. Anaerobe 2020; 64:102207. [PMID: 32360436 DOI: 10.1016/j.anaerobe.2020.102207] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 11/22/2022]
Abstract
Bacteremia implicating anaerobic bacteria (BIAB) represents 2-6% of all episodes of bacteremia and is associated with high mortality. In this retrospective study from June 2015 to December 2016, we compared BIAB frequency in two hospital centers in Montpellier (France): Montpellier university hospital (MUH) and a center specialized in cancer (ICM). Among the 2465 microbiologically relevant episodes of bacteremia, we identified 144 (5.8%) in which anaerobic bacteria were implicated. BIAB frequency was higher at ICM than MUH (10.4%, vs. 4.9%, p < 0.01). Poly-microbial bacteremia was more frequent among the BIAB episodes (31.9% vs. 11.0% for aerobic-only bacteremia, p < 0.01). Bacteroides and Clostridium were the most frequently identified genera of anaerobic bacteria (64 and 18 episodes, respectively), with the B. fragilis group (BFG) involved in 68/144 episodes. We could perform antibiotic susceptibility typing in 106 of the 144 anaerobic isolates, including 67 BFG isolates. All isolates but one were susceptible to metronidazole. In the BFG, sporadic resistant or intermediate results were found for amoxicillin-clavulanate (5/67), piperacillin-tazobactam (2/67) and imipenem (1/67). BFG isolates were susceptible also to cefoxitin (90.8%), rifampicin (97.0%) and tigecyclin (91.0%). Multidrug resistance in this group (7 isolates) was mostly due to acquired resistance to moxifloxacin, clindamycin and tigecyclin. This study shows that BIAB frequency can vary among hospitals and services. They should especially be taken into account in centers specialized in cancer treatment. However, the implicated bacteria remain frequently susceptible to the most used antibiotics used against anaerobic bacteria, although resistance does exist.
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Rieber H, Frontzek A, Alefeld M, Heinrich S, Barden B, Jerosch J, Breil-Wirth A, Schmitt H, Ulatowski M, Götz S, Mullahi A, Fischer M, Weber R, Pfander D, Sakkal A, Kukuk P, Bell A. Sonicate fluid inoculated into blood culture bottles does not improve diagnosis of periprosthetic joint infection caused by anaerobes. A retrospective analysis. Anaerobe 2020; 62:102152. [DOI: 10.1016/j.anaerobe.2020.102152] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/10/2020] [Accepted: 01/14/2020] [Indexed: 12/17/2022]
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9
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Gajdács M, Ábrók M, Lázár A, Terhes G, Urbán E. Anaerobic blood culture positivity at a University Hospital in Hungary: A 5-year comparative retrospective study. Anaerobe 2020; 63:102200. [PMID: 32247001 DOI: 10.1016/j.anaerobe.2020.102200] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 12/18/2022]
Abstract
Anaerobic bacteremia (AB) is usually detected in about 0.5-13% of positive blood cultures. The aim of this study was to determine prevalence of anaerobic bacteremia over a 5-year period (2013-2017), to identify current trends at our University Hospital and to compare the results to those in a similar study (2005-2009) in the same region. During the study period, an average of 23,274 ± 2,756 blood cultures were received per year. Out of the positive blood cultures, 3.3-3.6% (n = 423) yielded anaerobic bacteria, representing 3.5-3.8 anaerobic isolates/1000 blood culture bottles (including both aerobic and anaerobic bottles) per year for hospitalized patients. Mean age of affected patients was 70-73 years (range: 18-102 years) with a male-to-female ratio: 0.60. Most isolated anaerobes were Cutibacterium spp. (54.0 ± 8.5%; n = 247), while among anaerobes other than Cutibacterium spp., Bacteroides and Parabacteroides and Clostridium spp. were the most prevalent. Blood culture time-to-positivity (TTP) for clinically relevant bacteria was 31.4 ± 23.4 h, while for Cutibacterium spp., TTP values were 112.9 ± 37.2 h (p < 0.0001). In conclusion, the prevalence of anaerobic bacteremia should be determined on institutional basis.
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Affiliation(s)
- Márió Gajdács
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, 6720 Szeged, Eötvös utca 6, Szeged, Hungary
| | - Marianna Ábrók
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, 6725 Szeged, Semmelweis utca 6, Szeged, Hungary
| | - Andrea Lázár
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, 6725 Szeged, Semmelweis utca 6, Szeged, Hungary
| | - Gabriella Terhes
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, 6725 Szeged, Semmelweis utca 6, Szeged, Hungary
| | - Edit Urbán
- Department of Public Health, Faculty of Medicine, University of Szeged, 6720 Szeged, Dóm tér 10, Szeged, Hungary.
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Mohan A, Rubin J, Chauhan P, Ramirez JL, Giese G. Renal and perinephric abscesses involving Lactobacillus jensenii and Prevotella bivia in a young woman following ureteral stent procedure. J Community Hosp Intern Med Perspect 2020; 10:162-165. [PMID: 32850056 PMCID: PMC7425617 DOI: 10.1080/20009666.2020.1742494] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
is a gram-positive bacillus in the female genital tract believed to be a commensal
organism that inhibits the growth of more virulent pathogens. Prevotella bivia is a gram-negative bacillus species also typically
commensal in the female genital tract. Lactobacillus as
the primary causative agent in perinephric abscesses and bacteremia has been documented,
albeit very uncommon and opportunistic. Prevotella
bivia is not classically associated with perinephric abscesses but has been
implicated in rare cases of pelvic inflammatory disease and tubo-ovarian abscesses. In
this report, we present a 26-year-old immunocompetent woman with a recent history of
nephrolithiasis treated with lithotripsy, ureteral stent placement and removal, and
antibiotics who was admitted for fever and severe right flank pain. Imaging showed a
right-sided renal and perinephric abscesses colonized by Lactobacillus jensenii and Prevotella bivia.
Blood cultures were also positive for Lactobacillus
species. Per literature review, intravenous ceftriaxone and metronidazole were
administered with successful resolution of abscesses and negative repeat blood
cultures. To our knowledge, this is the first case of simultaneous renal system
abscesses caused by Lactobacillus and Prevotella species. Nephrolithiasis and prior antibiotics likely contributed
to the opportunistic pathogenesis in this otherwise immunocompetent patient.
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Affiliation(s)
- Abhinav Mohan
- Internal Medicine Residency Program, Memorial Healthcare System, Hollywood, FL, USA
| | - Jacob Rubin
- Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, USA
| | - Priyank Chauhan
- Internal Medicine Residency Program, Memorial Healthcare System, Hollywood, FL, USA
| | - Juan Lemos Ramirez
- Internal Medicine Residency Program, Memorial Healthcare System, Hollywood, FL, USA
| | - German Giese
- Internal Medicine Residency Program, Memorial Healthcare System, Hollywood, FL, USA
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Jeverica S, El Sayed F, Čamernik P, Kocjančič B, Sluga B, Rottman M, Papst L. Growth detection of Cutibacterium acnes from orthopaedic implant-associated infections in anaerobic bottles from BACTEC and BacT/ALERT blood culture systems and comparison with conventional culture media. Anaerobe 2019; 61:102133. [PMID: 31813852 DOI: 10.1016/j.anaerobe.2019.102133] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 11/25/2019] [Accepted: 11/29/2019] [Indexed: 12/19/2022]
Abstract
Cutibacterium acnes is a major etiologic agent of orthopaedic implant-associated infections (IAIs) and requires up to 14 days of incubation in an anaerobic atmosphere for growth detection. As blood culture (BC) systems are increasingly being used to monitor the growth of IAI specimens, we compared different BC media for growth detection of C. acnes. Non-duplicate C. acnes isolates (n = 99) obtained from sonicate-fluid cultures of orthopaedic IAIs from Slovenia (n = 54), conventional tissue samples of monomicrobial orthopaedic IAIs from France (n = 43) and two reference strains were inoculated to anaerobic BC bottles of two major BC systems and 3 conventional culture media types (thioglycolate broth, Schaedler and chocolate agar). Growth and time-to-detection (TTD) were recorded. Only Lytic (BACTEC) and SN (BacT/ALERT) bottles consistently detected growth of C. acnes within 14 days with 94% (n = 93) and 92% (n = 91) detection rates, respectively (p = 0.79). Lytic was superior to Plus BACTEC medium (p < 0.001), while SN was superior to all other BacT/ALERT media (p < 0.001). Mean TTD was 128 ± 43 h (61-336 h) for Lytic and 158 ± 65 h (77-336 h) for SN medium. Among the conventional media, 99% (n = 98) of the isolates grew on Schaedler agar, 96% (n = 95) in thioglycolate broth and 74% (n = 73) on chocolate agar. Inconsistent growth of C. acnes in different BC media can critically influence the detection of this major IAI pathogen. Only Lytic (BACTEC) and SN (BacT/ALERT) BC media types were consistently able to detect C. acnes within 14 days of incubation. However, visible growth was observed faster in thioglycolate broth and Schaedler agar media.
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Affiliation(s)
- Samo Jeverica
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
| | - Faten El Sayed
- Microbiology Laboratory, Raymond Poincaré Hospital, Garches, France
| | - Petra Čamernik
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Boštjan Kocjančič
- Department of Orthopaedic Surgery, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Boštjan Sluga
- Department of Traumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Martin Rottman
- Microbiology Laboratory, Raymond Poincaré Hospital, Garches, France
| | - Lea Papst
- Clinic for Infectious Diseases and Febrile Illnesses, University Medical Centre Ljubljana, Ljubljana, Slovenia
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Li G, Sun J, Pan S, Li W, Zhang S, Wang Y, Sun X, Xu H, Ming L. Comparison of the Performance of Three Blood Culture Systems in a Chinese Tertiary-Care Hospital. Front Cell Infect Microbiol 2019; 9:285. [PMID: 31456951 PMCID: PMC6698792 DOI: 10.3389/fcimb.2019.00285] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/24/2019] [Indexed: 01/21/2023] Open
Abstract
In this study, we evaluated the performance of three blood culture systems in a Chinese tertiary-care hospital. Samples of simulated bacteremia were prepared using 10 mL of fresh blood from healthy humans and bacterial suspensions of known cell density. Portions of the specimens were treated with an antibiotic or antifungal drug at specified concentrations to simulate antibacterial drug treatment. We analyzed three blood culture systems: BACTEC Plus, BacT/Alert, and VersaTREK. Both time-to-detection (TTD) of 10 types of bacteria and five types of yeasts in samples without antibiotic treatment and positive detection rate of samples treated with different concentrations of antibiotic or antifungal drugs were compared among the culture systems. We also retrospectively analyzed the use of the culture systems in our hospital from 2015 to 2018. In the simulated study, in the absence of antibiotics, the VersaTREK REDOX 1 displayed the shortest TTD for Pseudomonas aeruginosa, Haemophilus influenzae, Staphylococcus aureus, Streptococcus pneumoniae, Candida albicans, and Candida glabrata (P < 0.001). Among the anaerobically cultured samples, BACTEC lytic/10 anaerobic/F displayed the shortest TTD for Escherichia coli, S. aureus, Enterococcus faecalis, S. pneumoniae, Bacteroides fragilis, and Bacteroides vulgatus (P < 0.001). Comparatively, BacT/Alert FA/FN showed no advantages. In antibiotic-treated samples, overall recovery rates for the BACTEC, BacT/Alert, and VersaTREK systems were, were 70.2, 43.7, and 27.4%, respectively. BACTEC facilitated higher recovery rate than the other two systems (P < 0.001). In antifungal treatment, the overall recovery rates for the BACTEC, BacT/Alert, and VersaTREK systems were 93.9, 98.3, and 69.4%, respectively. BACTEC Plus showed a recovery rate comparable to that of BacT/Alert (P = 0.835), and the recovery rate of both these systems was higher than that of VersaTREK (P < 0.001). The TTD values and positive rates determined in the retrospective study were consistent with those obtained in the simulated study. The combination of BACTEC PLUS Aerobic/F and BACTEC lytic/10 anaerobic/F culture systems displayed the best clinical performance. Furthermore, the BacT/Alert FAN culture system was found to be more resistant to antifungal drugs and levofloxacin, whereas the VersaTREK system is considered more suitable for primary blood cultures without antibiotic supplementation.
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Affiliation(s)
- Guanlin Li
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jingjing Sun
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shoucheng Pan
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wenti Li
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shijie Zhang
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yongfeng Wang
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaoxu Sun
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hui Xu
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liang Ming
- Department of Clinical Laboratory, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Sanabria A, Røkeberg MEO, Johannessen M, Sollid JE, Simonsen GS, Hanssen AM. Culturing periprosthetic tissue in BacT/Alert® Virtuo blood culture system leads to improved and faster detection of prosthetic joint infections. BMC Infect Dis 2019; 19:607. [PMID: 31291897 PMCID: PMC6621959 DOI: 10.1186/s12879-019-4206-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 06/19/2019] [Indexed: 12/21/2022] Open
Abstract
Background Blood culture bottles (BCBs) provide a semiautomated method for culturing periprosthetic tissue specimens. A study evaluating BCBs for culturing clinical samples other than body fluids is needed before implementation into clinical practice. Our objective was to evaluate use of the BacT/Alert® Virtuo blood culture system for culturing periprosthetic tissue specimens. Methods The study was performed through the analysis of spiked (n = 36) and clinical (n = 158) periprosthetic tissue samples. Clinical samples were analyzed by the BCB method and the results were compared to the conventional microbiological culture-based method for time to detection and microorganisms identified. Results The BacT/Alert® Virtuo blood culture system detected relevant bacteria for prosthetic joint infection in both spiked and clinical samples. The BCB method was found to be as sensitive (79%) as the conventional method (76%) (p = 0.844) during the analyses of clinical samples. The BCB method yielded positive results much faster than the conventional method: 89% against 27% detection within 24 h, respectively. The median detection time was 11.1 h for the BCB method (12 h and 11 h for the aerobic and the anaerobic BCBs, correspondingly). Conclusion We recommend using the BacT/Alert® Virtuo blood culture system for analyzing prosthetic joint tissue, since this detect efficiently and more rapidly a wider range of bacteria than the conventional microbiological method. Electronic supplementary material The online version of this article (10.1186/s12879-019-4206-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Adriana Sanabria
- Research Group for Host-Microbe Interactions, Department of Medical Biology, Faculty of Health Sciences, UiT, The Arctic University of Norway, Tromsø, Norway.
| | - Merethe E O Røkeberg
- Department of Microbiology and Infection Control, University Hospital of North Norway, Tromsø, Norway
| | - Mona Johannessen
- Research Group for Host-Microbe Interactions, Department of Medical Biology, Faculty of Health Sciences, UiT, The Arctic University of Norway, Tromsø, Norway
| | - Johanna Ericson Sollid
- Research Group for Host-Microbe Interactions, Department of Medical Biology, Faculty of Health Sciences, UiT, The Arctic University of Norway, Tromsø, Norway
| | - Gunnar Skov Simonsen
- Research Group for Host-Microbe Interactions, Department of Medical Biology, Faculty of Health Sciences, UiT, The Arctic University of Norway, Tromsø, Norway.,Department of Microbiology and Infection Control, University Hospital of North Norway, Tromsø, Norway
| | - Anne-Merethe Hanssen
- Research Group for Host-Microbe Interactions, Department of Medical Biology, Faculty of Health Sciences, UiT, The Arctic University of Norway, Tromsø, Norway
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Badri M, Nilson B, Ragnarsson S, Senneby E, Rasmussen M. Clinical and microbiological features of bacteraemia with Gram-positive anaerobic cocci: a population-based retrospective study. Clin Microbiol Infect 2018; 25:760.e1-760.e6. [PMID: 30217761 DOI: 10.1016/j.cmi.2018.09.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/28/2018] [Accepted: 09/04/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Gram-positive, anaerobic cocci (GPAC) can cause infections in humans. Only a few cases of bacteraemia with GPAC have been reported. We describe the clinical and microbiological characteristics of GPAC bacteraemia. METHODS A retrospective population-based study of GPAC bacteraemia 2012-2016 in southern Sweden was performed. GPAC were identified using matrix-associated laser desorption ionization time-of-flight mass spectrometry or 16S rRNA gene sequencing. Etests were used to determine antibiotic susceptibilities. Data on patient and infection characteristics, treatment, and outcome were collected from the medical records. RESULTS A total of 226 episodes of GPAC bacteraemia in adults were studied; this corresponds to an annual incidence of 3.4 cases per 100,000 persons per year. The bacteria identified were Anaerococcus spp. (n = 43), Atopobium spp. (n = 7), Blautia spp. (n = 1), Finegoldia spp. (n = 15), Parvimonas spp. (n = 100), Peptoniphilus spp. (n = 52), Peptostreptococcus spp. (n = 2), and Ruminococcus spp. (n = 9) of which 200 isolates were identified to the species level. Resistance to imipenem and piperacillin was not identified, whereas resistance among the 229 isolates to penicillin was detected in four, to metronidazole in six, and clindamycin in 16 isolates. The median age of patients was 73 years (55-83, IQR), 57% were male and comorbidities were common. Fifty-one per cent of infections were polymicrobial. In 60% of cases a focus of infection was identified. Forty per cent of patients had either organ dysfunction or shock. The 30-day mortality was 11%, and nosocomial infections were over-represented among the deceased. CONCLUSIONS GPAC bacteraemia is much more common than previously reported. GPAC-bacteraemia is a condition with significant mortality mainly affecting elderly persons with comorbidities.
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Affiliation(s)
- M Badri
- Lund University, Faculty of Medicine, Department of Clinical Sciences, Division of Infection Medicine, Lund, Sweden
| | - B Nilson
- Clinical Microbiology, Laboratory Medicine, Region Skåne, Lund, Sweden; Lund University, Faculty of Medicine, Department of Laboratory Medicine Lund, Section of Medical Microbiology, Lund, Sweden
| | - S Ragnarsson
- Lund University, Faculty of Medicine, Department of Clinical Sciences, Division of Cardiothoracic Surgery, Lund, Sweden
| | - E Senneby
- Lund University, Faculty of Medicine, Department of Clinical Sciences, Division of Infection Medicine, Lund, Sweden; Clinical Microbiology, Laboratory Medicine, Region Skåne, Lund, Sweden; Lund University, Faculty of Medicine, Department of Laboratory Medicine Lund, Section of Medical Microbiology, Lund, Sweden
| | - M Rasmussen
- Lund University, Faculty of Medicine, Department of Clinical Sciences, Division of Infection Medicine, Lund, Sweden; Skåne University Hospital, Division of Infection Medicine, Lund, Sweden.
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Sakhno NG, Gunar OV, Roshchina MV, Kolosova LV, Grigor’eva VÉ. Isolation of Anaerobic Bacteria During Quality Analysis of Medicinal Products. Pharm Chem J 2018. [DOI: 10.1007/s11094-018-1861-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Jeverica S, Nagy E, Mueller-Premru M, Papst L. Sample preparation method influences direct identification of anaerobic bacteria from positive blood culture bottles using MALDI-TOF MS. Anaerobe 2018; 54:231-235. [PMID: 29861277 DOI: 10.1016/j.anaerobe.2018.05.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 05/09/2018] [Accepted: 05/14/2018] [Indexed: 02/08/2023]
Abstract
Rapid detection and identification of anaerobic bacteria from blood is important to adjust antimicrobial therapy by including antibiotics with activity against anaerobic bacteria. Limited data is available about direct identification of anaerobes from positive blood culture bottles using MALDI-TOF mass spectrometry (MS). In this study, we evaluated the performance of two sample preparation protocols for direct identification of anaerobes from positive blood culture bottles, the MALDI Sepsityper kit (Sepsityper) and the in-house saponin (saponin) method. Additionally, we compared two blood culture bottle types designed to support the growth of anaerobic bacteria, the BacT/ALERT-FN Plus (FN Plus) and the BACTEC-Lytic (Lytic), and their influence on direct identification. A selection of 30 anaerobe strains belonging to 22 different anaerobic species (11 reference strains and 19 clinical isolates) were inoculated to 2 blood culture bottle types in duplicate. In total, 120 bottles were inoculated and 99.2% (n = 119) signalled growth within 5 days of incubation. The Sepsityper method correctly identified 56.3% (n = 67) of anaerobes, while the saponin method correctly identified 84.9% (n = 101) of anaerobes with at least log(score) ≥1.6 (low confidence correct identification), (p < 0.001). Gram negative anaerobes were better identified with the saponin method (100% vs. 46.5%; p < 0.001), while Gram positive anaerobes were better identified with the Sepsityper method (70.8% vs. 62.5%; p = 0.454). Average log(score) values among only those isolates that were correctly identified simultaneously by both sample preparation methods were 2.119 and 2.029 in favour of the Sepsityper method, (p = 0.019). The inoculated bottle type didn't influence the performance of the two sample preparation methods. We confirmed that direct identification from positive blood culture bottles with MALDI-TOF MS is reliable for anaerobic bacteria. However, the results are influenced by the sample preparation method used.
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Affiliation(s)
- Samo Jeverica
- Institute of Microbiology and Immunology, Medical Faculty, University of Ljubljana, Ljubljana, Slovenia.
| | - Elisabeth Nagy
- Institute of Clinical Microbiology, University of Szeged, Szeged, Hungary
| | - Manica Mueller-Premru
- Institute of Microbiology and Immunology, Medical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Lea Papst
- Clinic for Infectious Diseases and Febrile Illnesses, University Medical Centre Ljubljana, Ljubljana, Slovenia
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