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Journal of Clinical Microbiology, September 2007, p. 3098-3100, Vol. 45, No. 9
0095-1137/07/$08.00+0     doi:10.1128/JCM.00426-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Evaluation of BBL CHROMagar O157 versus Sorbitol-MacConkey Medium for Routine Detection of Escherichia coli O157 in a Centralized Regional Clinical Microbiology Laboratory{triangledown}

D. L. Church,1,2* D. Emshey,1 H. Semeniuk,1 T. Lloyd,1 and J. D. Pitout1,2

Calgary Laboratory Services (CLS),1 Departments of Pathology and Laboratory Medicine and Medicine, University of Calgary, Calgary, Alberta, Canada2

Received 23 February 2007/ Returned for modification 16 April 2007/ Accepted 10 July 2007

The performance of BBL CHROMagar O157 (CHROM) versus that of sorbitol-MacConkey (SMAC) media for detection of Escherichia coli O157 was determined for a 3-month period. Results for 27/3,116 (0.9%) stool cultures were positive. CHROM had a higher sensitivity (96.30%) and negative predictive value (100%) and a better diagnostic efficiency than SMAC. Labor and material costs decreased when CHROM was used.

* Corresponding author. Mailing address: Division of Microbiology, Calgary Laboratory Services, 9-3535 Research Rd. N.W., Calgary, Alberta T2N 4B8, Canada. Phone: (403) 770-3281. Fax: (403) 770-3347. E-mail: Deirdre.church{at}cls.ab.ca

{triangledown} Published ahead of print on 18 July 2007.

Journal of Clinical Microbiology, September 2007, p. 3098-3100, Vol. 45, No. 9
0095-1137/07/$08.00+0     doi:10.1128/JCM.00426-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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