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  1. Article ; Online: Clinical Significance of BD Bactec FX Blood Culture Incubation Beyond 96 Hours (4 Days).

    Ulrich, Patrizia Sophia / Bastian, Ingmar N / Chen, Derrick J

    Journal of clinical microbiology

    2022  Volume 60, Issue 7, Page(s) e0054922

    Abstract: Blood cultures (BC) for bacteria and yeast have traditionally been incubated for 5 days using modern instruments. Many organisms may grow sooner, and the need for the full 5-day incubation period has been questioned. This study evaluated the clinical ... ...

    Abstract Blood cultures (BC) for bacteria and yeast have traditionally been incubated for 5 days using modern instruments. Many organisms may grow sooner, and the need for the full 5-day incubation period has been questioned. This study evaluated the clinical significance of isolates recovered beyond 96 h. A retrospective chart review was conducted on all positive BC (+BC) performed via BD Bactec FX with >96 h of incubation from 5/2019 to 1/2022 at the UW Health University Hospital clinical microbiology laboratory. A total of 59,958 BC were performed; 6,031 (10%) were +BC. Of +BC, 104 (2%) demonstrated growth >96 h. The 104 cultures were from 89 patients and included 12 (12%) Staphylococcus aureus (1 MRSA), 9 (9%) yeast (8
    MeSH term(s) Anti-Bacterial Agents ; Bacteremia/diagnosis ; Bacteremia/microbiology ; Blood Culture/methods ; Culture Media ; Escherichia coli ; Humans ; Retrospective Studies ; Saccharomyces cerevisiae ; Staphylococcus aureus
    Chemical Substances Anti-Bacterial Agents ; Culture Media
    Language English
    Publishing date 2022-06-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 390499-4
    ISSN 1098-660X ; 0095-1137
    ISSN (online) 1098-660X
    ISSN 0095-1137
    DOI 10.1128/jcm.00549-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Diagnostic and Therapeutic Utility of Positive Intravascular Catheter Tip Cultures.

    Ulrich, Patrizia / Lepak, Alexander J / Chen, Derrick J

    Microbiology spectrum

    2022  , Page(s) e0402222

    Abstract: This study evaluated the performance and clinical utility of performing intravascular catheter tip cultures (CTC). A retrospective chart review was conducted over a 2.5 year period on all patients who demonstrated growth of at least one organism on CTC. ... ...

    Abstract This study evaluated the performance and clinical utility of performing intravascular catheter tip cultures (CTC). A retrospective chart review was conducted over a 2.5 year period on all patients who demonstrated growth of at least one organism on CTC. There were a total of 391 CTC performed. 88 (23%) grew at least one organism, while 303 (77%) had no growth. Of the positive CTC, 81 (92%) had blood cultures (BC) collected within 14 days, whereas 7 (8%) did not. Of the positive CTC with BC, 67 (83%) were BC-positive, whereas 14 (17%) were negative. For cases with growth on both CTC and BC, the organisms identified were concordant for 46 (69%) cases and discordant for 21 (31%). Of the concordant cases, 43 (93%) were clinically considered to be bacterial bloodstream infections that were secondary to a catheter infection. For all of the positive CTC cases total, there was no change in the antibiotics or management, with the exceptions of 2 out of 88 (2%) cases. Catheters were removed and cultured for an average of 38.6 h (range: -98 to 288 h) after positive BC results were available. Most CTC are negative, and for the CTC that are positive, most are concordant with BC results. CTC results are generally only available several days after positive BC results are known. The CTC results did not alter the antibiotic therapy or management, with the exceptions of rare cases. As such, this study concludes that CTC do not contribute diagnostic or therapeutic value. Therefore, current guidelines by the Infectious Diseases Society of America on catheter-related bloodstream infection diagnosis should be revised to exclude CTC collection.
    Language English
    Publishing date 2022-11-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.04022-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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