Annals of Clinical Microbiology, The official Journal of the Korean Society of Clinical Microbiology


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Indexed in KCI, KoreaMed, Synapse, DOAJ
Open Access, Peer Reviewed
pISSN 2288-0585 eISSN 2288-6850

Quality Assurance for Commercially Prepared Microbiological Culture Media

Original article

Annals of Clinical Microbiology (Ann Clin Microbiol) 2003 June Volume 6, Issue 1, pages 56-62.

Quality Assurance for Commercially Prepared Microbiological Culture Media

Tae Yeal Choi

Department of Laboratory Medicine, Hanyang University College of Medicine Seoul, Korea


Background:Culture media that perform as intended are crucial to accurate work by a clinical microbiology laboratory. The author evaluated commercially prepared microbiological culture media for quality assurance. 

Material and methods:Five types of commercially prepared media from Shin Yang Chemical Co., Ltd. were evaluated in Hanyang University Hospital for one year. Five types included blood agar media, chocolate agar, MacConkey agar, Salmonella-Shigella agar and Mueller-Hinton agar. All media were evaluated by NCCLS M22-A2 (Quality assurance for commercially prepared microbiological culture media-second edition; approved standard, 1996). 

Results:Blood agar media provided luxuriant growth of many bacteria-especially the fastidious streptococci and pneumococci, as shown by early colonial development and clear hemolytic reactions with S. pyogeses. Chocolate agar supported growth of fastidious bacteria such as N. gonorrheaeand H. influenzae. MacConkey agar gave excellent differentiation between coliforms and non-lactose fermenters with inhibition of Gram-positive micrococci. Salmonella-Shigella agar was a good differential selective medium for the isolation of Salmonella and some Shigella species from clinical specimens. Mueller-Hinton agar showed good reproducibility for antimicrobial susceptibility test by the disk diffusion method. 

Conclusion:The five types of commercially prepared culture media have demonstrated competence and integrity for bacterial culture in clinical trial. Theses media could be used without performance quality assurance test by user. (Korean J Clin Microbiol 2003;6(1):56-62)


Culture media, Quality assurance, Quality control