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Sukantha Chandrasekaran, April Abbott, Shelley Miller, Barb Zimmer, Mel Weinstein, Lauri Thrupp, John Hejna, Lindsey Walker, Tracy Ammann, Thomas Kirn, Robin Patel, Romney M Humphries
The performance of disk diffusion, using broth from positive blood cultures as inoculum ("direct disk diffusion", dDD), was evaluated for a collection of 20 challenge isolates of Enterobacteriaceae, Acinetobacter baumannii and Pseudomonas aeruginosa. Isolates seeded into human blood were inoculated into BACTEC™ Plus Aerobic/F, VersaTREK REDOX 1 and BacT/ALERT FA Plus bottles and incubated on the respective automated blood culture systems. Disk diffusion results were compared to reference disk diffusion. Categorical agreement (CA) of dDD, after removal of random errors due to natural MIC variation, was 87...
January 5, 2018: Journal of Clinical Microbiology
Rosemary C She, Marc G Romney, Willson Jang, Tamar Walker, James K Karichu, Sandra S Richter
OBJECTIVES: Continuous monitoring blood culture systems are commonly used for sterile body fluid cultures. In this multi-center study, we evaluated the performance of the new generation BacT/Alert Virtuo system compared to the BacT/Alert 3D and conventional culture for the recovery of microorganisms from sterile body fluids. METHODS: Peritoneal, cerebrospinal, pericardial, pleural, and synovial fluids from adult patients submitted for culture were collected from three different centers...
December 20, 2017: Clinical Microbiology and Infection
Mordechai Grupper, David P Nicolau, Jaber Aslanzadeh, Linda K Tanner, Joseph L Kuti
The effectiveness of antimicrobial binding resins present in blood culture (BC) bottles in removing meropenem, ceftolozane-tazobactam, and ceftazidime-avibactam is unknown. We assessed the time to detection (TTD) and growth of 2 Pseudomonas aeruginosa isolates in the presence of clinically meaningful concentrations of these antibiotics. Bactec Plus Aerobic/F and BacT/Alert FA Plus BC bottles were inoculated with one of two isolates (1 meropenem susceptible and 1 resistant), followed by fresh whole blood containing the peak, midpoint, or trough plasma concentrations for meropenem, ceftolozane-tazobactam, and ceftazidime-avibactam...
December 2017: Journal of Clinical Microbiology
Michael R Jacobs, Tony Mazzulli, Kevin C Hazen, Caryn E Good, Ayman M Abdelhamed, Pauline Lo, Bianche Shum, Katharine P Roman, Danielle C Robinson
BacT/Alert Virtuo is an advanced, automated blood culture system incorporating improved automation and an enhanced detection algorithm to shorten time to detection. A multicenter study of the investigational Virtuo system (bioMérieux, Inc., Durham, NC) compared to BacT/Alert 3D (BTA3D) for detection of bacteremia/fungemia in four bottle types, SA and FA Plus (aerobic) and SN and FN Plus (anaerobic), was performed in a clinical setting with patient samples in a matched system design clinical trial. Blood was added to paired aerobic or anaerobic bottles, with the volume in each bottle in each pair required to be ≤10 ml and with the volumes required to be within 30% of each other...
August 2017: Journal of Clinical Microbiology
H Totty, M Ullery, J Spontak, J Viray, M Adamik, B Katzin, W M Dunne, P Deol
The performance of the next-generation BacT/ALERT® VIRTUO™ Microbial Detection System (VIRTUO™, bioMérieux Inc., Hazelwood, MO) was compared to the BacT/ALERT® 3D Microbial Detection System (3D, bioMérieux Inc., Durham, NC) using BacT/ALERT® FA Plus (FA Plus), BacT/ALERT® PF Plus (PF Plus), BacT/ALERT® FN Plus (FN Plus), BacT/ALERT® Standard Aerobic (SA), and BacT/ALERT® Standard Anaerobic (SN) blood culture bottles (bioMérieux Inc., Durham, NC). A seeded limit of detection (LoD) study was performed for each bottle type in both systems...
October 2017: European Journal of Clinical Microbiology & Infectious Diseases
Mustafa Altindis, Tayfur Demiray, Mehmet Koroglu, Umit Kilic, Aybala Neslihan Alagoz, Aziz Ogutlu, Oguz Karabay
BACKGROUND: Blood cultures are the main diagnostic laboratory tool to detect bloodstream infections. Many clinical microbiology laboratories utilize automated blood culture systems to isolate infectious agents from blood samples. The diagnostic performance and time-to-detection values of the novel automated blood culture system, DLBt112TM (DL), was compared with BacT/Alert 3DTM (B3D) in this prospective comparative study with clinical samples. METHODS: A total of 356 blood culture sets (178 sets for each system) were evaluated over a 6-month period in a university hospital...
April 1, 2017: Clinical Laboratory
D Lovern, B Katzin, K Johnson, D Broadwell, E Miller, A Gates, P Deol, K Doing, A van Belkum, C Marshall, E Mathias, W M Dunne
The capacity of absorbent beads in BacT/ALERT® FA Plus and BACTEC® Aerobic/F Plus blood culture bottles to bind and neutralize antibiotics was compared. Binding was established using reverse-phase HPLC, and inactivation was based on the recovery of susceptible test stains from simulated blood cultures. The FA Plus medium demonstrated more rapid and better overall binding kinetics for each drug tested, resulting in significantly better overall recovery rates. Differences in time to detection favored the FA Plus medium for three drug/organism combinations and Aerobic/F Plus for two...
December 2016: European Journal of Clinical Microbiology & Infectious Diseases
A Nutman, S Fisher Even-Tsur, G Shapiro, T Braun, D Schwartz, Y Carmeli
Rapid identification of the causative pathogen in patients with bacteremia allows adjustment of antibiotic therapy and improves patient outcomes. We compared in vitro and real-life time to detection (TTD) of two blood culture media, BacT/Alert FA (FA) and BacT/Alert FA Plus (FA Plus), for the nine most common species of bacterial pathogens recovered from blood samples. Experimental data from simulated cultures was compared with microbiology records of TTD for both culture media with growth of the species of interest in clinical blood cultures...
September 2016: European Journal of Clinical Microbiology & Infectious Diseases
A Egli, M Osthoff, D Goldenberger, J Halter, S Schaub, J Steiger, M Weisser, R Frei
INTRODUCTION: In immunosuppressed hosts, rapid identification of microorganisms of bloodstream infections is crucial to ensuring effective antimicrobial therapy. Conventional culture requires up to 72 h from sample collection to pathogen identification. METHODS: We used the SepsiTyper Kit and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF; Microflex, Bruker) directly from positive blood culture (BacT/ALERT 3D, FN/FA vials; bioMérieux) in comparison to standard culture methodology (VITEK 2; bioMérieux) for species identification...
June 2015: Transplant Infectious Disease: An Official Journal of the Transplantation Society
H Thomasen, F Mosel, K-P Steuhl, D Meller
Careful testing for microbial contamination is essential for corneal transplants. Sterility tests are performed on the antibiotics containing culture medium leaving the problem that antibiotics might compromise the test results. In this study a protocol for the application of the automated BacT/Alert system for sterility testing of corneal cell culture medium was examined. Corneal culture medium in combination with an antibiotics degrading enzyme were injected in resin containing test bottles of the BacT/Alert system named FA plus (intended for aerobic microorganisms) or FN plus (intended for anaerobic microorganisms) depending on their aerobic or anaerobic nature...
September 2015: Cell and Tissue Banking
Mina Takano, Shuichiro Hoshi, Kumiko Nagai, Haruka Ishidaira, Masanobu Onozaki, Kazuo Satoh, Koichi Makimura
This report describes a fatal case Prototheca zopfii genotype 2 infection in an immunosuppressed patient. The patient was a 62-year-old housewife who presented general malaise in April 2011. Hairy cell leukemia was highly suspected. Chemotherapy was started because the patient developed severe pancytopenia in October 2011. Itraconazole capsules (100 mg/day) and trimethoprim (320 mg/day) plus sulfamethoxazole (1600 mg/day) combinations were orally administered for prophylaxis of fungal infections. Of BacT/ALERT 3D FA aerobic culture bottles and FN anaerobic culture bottles, only FA aerobic blood culture bottles produced positive reactions when the patient developed fever in January 2012...
October 2014: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
Mohammed Almuhayawi, Osman Altun, Kristoffer Strålin, Volkan Ozenci
In this study, we investigated the performance of the FilmArray and matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) in identifying microorganisms from blood culture (BC) bottles prior to positivity. First, we used simulated BacT/Alert FA Plus BC bottles with five each for Escherichia coli and Staphylococcus aureus isolates. The FilmArray identified all 10 isolates before BC positivity with 9/10 at 5 h and 1 at 7.5 h after incubation in the BC system. MALDI-TOF MS failed to identify the isolates prior to positivity...
September 2014: Journal of Clinical Microbiology
T J Kirn, S Mirrett, L B Reller, M P Weinstein
New blood culture media containing antibiotic-binding polymeric beads have been developed for the BacT/Alert (bioMérieux, Inc., Durham, NC) blood culture system. To assess the performance of these new media, we compared the new BacT/Alert aerobic medium (FA Plus) with resins to BacT/Alert FA medium with activated charcoal and the new BacT/Alert anaerobic medium (FN Plus) to BacT/Alert FN medium at 3 tertiary care medical centers. Study bottle pairs were inoculated with a target volume of 6 to 10 ml of blood from adults and incubated in the BacT/Alert 3D blood culture instrument...
March 2014: Journal of Clinical Microbiology
Dong-Hyun Lee, Seong Chun Kim, In-Gyu Bae, Eun-Ha Koh, Sunjoo Kim
The performance of the BacT/Alert FA Plus and FN Plus resin bottles was evaluated in comparison with that of standard aerobic (SA) and standard anaerobic (SN) bottles. Twenty milliliters of blood from adult patients was equally distributed into four types of bottles: FA Plus, FN Plus, SA, and SN. The detection of clinically significant organisms and the time to detection (TTD) were monitored for each bottle. Among the 3,103 blood culture sets that were requested, the blood volume of each bottle was over 4 ml in 1,481 sets (47...
December 2013: Journal of Clinical Microbiology
Therese Nylén, Baharak Saeedi, Camilla Borg, Måns Ullberg, Volkan Özenci
The purpose of this investigation was to evaluate the performance of 4 supplements: horse blood, fastidious organisms supplement (FOS), haemin isovitalex albumine (HIA), and brain heart infusion-haemin isovitalex albumine (BHI-HIA) and 5 blood culture bottles: Bactec Mycosis IC/F, Plus Aerobic/F, Peds Plus/F from the Bactec 9240 system, and BacT/Alert FA and BacT/Alert PF from the BacT/Alert 3D system, in detection of bacteria and Candida spp. in simulated sterile body fluids other than blood models. In total, 8 reference strains (Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae, Listeria monocytogenes, Candida albicans, and Candida parapsilosis) and 11 clinical bacteria and yeast isolates (6 isolates from cerebrospinal fluid and 5 isolates from blood) were included in this study...
September 2013: Diagnostic Microbiology and Infectious Disease
Christina M Wojewoda, Linda Sercia, Maria Navas, Marion Tuohy, Deborah Wilson, Geraldine S Hall, Gary W Procop, Sandra S Richter
Rapid identification of pathogens from blood cultures can decrease lengths of stay and improve patient outcomes. We evaluated the accuracy of the Verigene Gram-positive blood culture (BC-GP) nucleic acid test for investigational use only (Nanosphere, Inc., Northbrook, IL) for the identification of Gram-positive bacteria from blood cultures. The detection of resistance genes (mecA in Staphylococcus aureus and Staphylococcus epidermidis and vanA or vanB in Enterococcus faecium and Enterococcus faecalis) by the BC-GP assay also was assessed...
July 2013: Journal of Clinical Microbiology
Dieter Mitteregger, Wolfgang Barousch, Marion Nehr, Michael Kundi, Markus Zeitlinger, Athanasios Makristathis, Alexander M Hirschl
Time to detection (TTD) in automated blood culture systems is delayed for sensitive microorganisms in the presence of antimicrobial substances and has been associated with worse outcomes for sepsis patients on inadequate empirical therapy. While resin addition removes antimicrobial substances to various degrees from blood culture media, media formulations and the blend of resins may influence performance. The BacT/Alert 3D system (bioMérieux) was investigated using the new resin-containing medium types FA Plus (aerobic) and FN Plus (anaerobic)...
May 2013: Journal of Clinical Microbiology
Dong Wook Jekarl, So-Young Lee, Seungok Lee, Yeon-Joon Park, Jehoon Lee, Sun Mi Baek, Yeon Ju An, Sun Myeong Ock, Mi-Kyung Lee
BACKGROUND: The performance of Bactec Fx Plus Aerobic/F (PA), Mycosis IC/F (MF), Myco/F Lytic (ML) media and BacT/Alert 3D FA (FA) media in detecting 15 Candida isolates in blood cultures to which fluconazole had been added was investigated. METHODS: PA with resin, MF, ML media (n = 360), and FAmedia (n = 120) were tested against Candida albicans, C. tropicalis, C. parapsilosis, and C. krusei. As the peak plasma concentration after single oral doses of fluconazole 100, 200, and 400 mg was equivalent to peak level of 1...
November 2012: Journal of Clinical Laboratory Analysis
L Klingspor, S A Muhammed, V Ozenci
The purpose of this investigation was to evaluate the performance of the Bactec 9240 and BacT/Alert 3D blood culture systems in the detection of Candida spp. and bacteria in simulated polymicrobial sepsis models. A total of 28 clinical isolates of Escherichia coli, Staphylococcus aureus, Candida albicans, and Candida glabrata were studied. Five polymicrobial models of C. albicans + S. aureus, C. albicans + E. coli, C. glabrata + S. aureus, C. glabrata + E. coli, and C. albicans + C. glabrata were prepared. Each combination was inoculated in five different blood culture vials...
November 2012: European Journal of Clinical Microbiology & Infectious Diseases
Kyoung Ho Roh, Ju Yeon Kim, Ha Nui Kim, Hye Jin Lee, Jang Wook Sohn, Min Ja Kim, Yunjung Cho, Young Kee Kim, Chang Kyu Lee
Blood culture is the most valuable laboratory test for the diagnosis of bacteremia and sepsis. The BACTEC FX and BacT/Alert 3D automated blood culture systems are commonly used in Korean health care facilities. A controlled clinical evaluation of the resin-containing BACTEC Plus aerobic (BA) and anaerobic (BN), and the charcoal-containing FAN aerobic (FA) and anaerobic (FN) bottles using blood from intensive care unit (ICU) patients was designed. The performances of these 2 systems with media containing particle absorbing antimicrobial agents were evaluated using the culture positivity rate and time to detection (TTD)...
July 2012: Diagnostic Microbiology and Infectious Disease
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