title: Comprehensive analysis of blood culture performed at nine university hospitals in Korea.
abstract: BACKGROUND
  Optimal blood culture performance is critical for successful diagnosis and treatment of sepsis. To understand the status of blood culture, we investigated several aspects of the procedure at 9 university hospitals.
  
  
  METHODS
  The process of ordering blood culture sets and sampling volume for adults and children was investigated from January 2010 to April 2010, while the positive rate of detection and growth of skin contaminants were compared in 2009. Microbial growth in aerobic and anaerobic bottles was investigated prospectively.
  
  
  RESULTS
  A majority of the hospitals used 2 sets of bottles for adults and 1 bottle for children. The average blood volume in each set was 7.7 mL for adults and 2.1 mL for children. The positive rate of microorganisms was 8.0%, and the isolation rate of the normal flora of the skin was 2.1%. Bacterial growth rates in aerobic and anaerobic bottles only were 31.8% and 24.5% respectively.
  
  
  CONCLUSIONS
  Ordering blood culture sets and sampling volumes did not comply with CLSI guidelines. However, the rate of positive cultures and skin contamination rates were acceptable. Anaerobic bottles are useful in enhancing the yield of microorganisms.
authors.affiliation: Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea.
authors.forename: Jeong Hwan
authors.initials: JH
authors.lastname: Shin
authors.forename: Sae Am
authors.initials: SA
authors.lastname: Song
authors.forename: Mi-Na
authors.initials: MN
authors.lastname: Kim
authors.forename: Nam Yong
authors.initials: NY
authors.lastname: Lee
authors.forename: Eui-Chong
authors.initials: EC
authors.lastname: Kim
authors.forename: Sunjoo
authors.initials: S
authors.lastname: Kim
authors.forename: Sun-Hoi
authors.initials: SH
authors.lastname: Koo
authors.forename: Nam Hee
authors.initials: NH
authors.lastname: Ryoo
authors.forename: Jae-Seok
authors.initials: JS
authors.lastname: Kim
authors.forename: Ji-Hyun
authors.initials: JH
authors.lastname: Cho
mesh_terms: D000328:Adult; D016470:Bacteremia / Q000097:blood / Q000382:microbiology*; D001420:Bacteria, Aerobic / Q000302:isolation & purification; D001421:Bacteria, Anaerobic / Q000302:isolation & purification; D001769:Blood / Q000382:microbiology; D002648:Child; D006785:Hospitals, University; D006801:Humans; D011446:Prospective Studies; D056910:Republic of Korea; D012867:Skin / Q000382:microbiology