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Single-site sampling versus multi-site sampling for blood cultures; A retrospective clinical study
Karolinska Institutet, Sweden .
Karolinska Institutet, Sweden; Karolinska University Hospital, Sweden .
Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.ORCID iD: 0000-0002-7043-9815
Stockholm South Hospital, Sweden.
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2022 (English)In: Journal of Clinical Microbiology, ISSN 0095-1137, E-ISSN 1098-660X, Vol. 60, no 2, article id e0193521Article in journal (Refereed) Published
Abstract [en]

Objectives The performance of blood cultures (BC) relies on optimal sampling. Sepsis guidelines do not specify which sampling protocol to use, but recommend two sets of BC bottles, each set containing one aerobic and one anaerobic bottle. For the single-site sampling (SSS) protocol, only one venipuncture is performed for all four bottles. The predominating multi-site sampling (MSS) protocol implies that BC bottles are collected from two separate venipuncture sites. The aim of this study was to compare SSS and MSS. Primary outcomes were number of BC sets collected, sample volume and diagnostic performance. Methods This was a retrospective clinical study comparing BC results in an emergency department before and after changing the sampling protocol to SSS from MSS. All BC samples were incubated in the BacT/ALERT BC system. Results The analysis included 5,248 patients before and 5,364 patients after the implementation of SSS. There was a significantly higher proportion of positive BCs sampled with SSS compared to MSS, 1,049/5,364 (19.56%) and 932/5,248 (17.76%) respectively (P=0.018). This difference was due to a higher proportion of solitary BC sets (two BC bottles) in MSS. Analyzing only patients with the recommended four BC bottles, there was no difference in positivity. SSS had a higher proportion of BC bottles with the recommended sample volumes of 8-12 ml than MSS (P<0.001). Conclusions Changing the sampling protocol to SSS from MSS resulted in higher positivity rates, higher sample volume and fewer solitary BC sets. These advantages of SSS should be considered in future sepsis guidelines.

Place, publisher, year, edition, pages
American Society for Microbiology , 2022. Vol. 60, no 2, article id e0193521
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Cancer and Oncology
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URN: urn:nbn:se:sh:diva-47754DOI: 10.1128/JCM.01935-21ISI: 000765805200012PubMedID: 34851687Scopus ID: 2-s2.0-85124795072OAI: oai:DiVA.org:sh-47754DiVA, id: diva2:1618502
Note

Correction for Ekwall-Larson et al., “Single-Site Sampling versus Multisite Sampling for Blood Cultures: a Retrospective Clinical Study”. Journal of Clinical Microbiology, vol. 60(9), e01180-22. DOI 10.1128/jcm.01180-22

Available from: 2021-12-09 Created: 2021-12-09 Last updated: 2022-11-03Bibliographically approved

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