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KMID : 0829320130160010008
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Korean Journal of Clinical Microbiology
2013 Volume.16 No. 1 p.8 ~ p.12
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A Multicentre Study about Pattern and Organisms Isolated in Follow-up Blood Cultures
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Shin Jeong-Hwan
Kim Eui-Chong
Kim Sun-Joo
Koh Eun-Ha
Lee Dong-Hyun
Koo Sun-Hoe
Cho Ji-Hyun
Kim Jae-Seok
Ryoo Nam-Hee
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Abstract
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Background: This study analysed patterns of requestsfor repeated blood cultures and the microorganismsisolated in follow-up cultures.Methods: The frequencies and intervals of repeatedblood cultures performed during January and February of 2010 at seven university-affiliated hospitals in Korea were evaluated. Results of microbiologicalcultures at follow-up were analysed with respect to pathogen replication, immune clearance, appearanceof new pathogens, and skin contaminants.Results: Among 3,072 patients who received repeated blood cultures, the average number of requests was 3.2. Of the 5,241 follow-up blood culture events recorded, durations of 1, 2, and 3 days between cultures were identified for 23.1%, 21.4%, and 15.0% of events, respectively. Relative to each initial culture, persistent pathogen growth in subsequent culture(s) accounted for 2.3% of events, whereas immune clearance was confirmed in 8.5% of events. Previously undetected pathogens were isolated in 5.2% of the follow-up cultures, the majority of which grew after an interval of six days. Skin contaminants were detected in 7.6% of the repeated cultures, and 76.1% of the follow-ups displayed no growth of microorganisms.Conclusion: The most common numbers of repeat culture requests were two and three, and these were typically performed within three days of the initial culture. Among the follow-up cultures, new pathogens were identified in 5.2%, and the majority of this group likely presented for follow-up during a new disease episode. (Ann Clin Microbiol 2013;16:8-12)
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KEYWORD
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Bacteraemia, Follow-up study, Sepsis
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