Evaluation of three chromogenic media (MRSA-ID, MRSA-Select and CHROMagar MRSA) and ORSAB for surveillance cultures of methicillin-resistant Staphylococcus aureus.

Détails

ID Serval
serval:BIB_F0781BFE9964
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evaluation of three chromogenic media (MRSA-ID, MRSA-Select and CHROMagar MRSA) and ORSAB for surveillance cultures of methicillin-resistant Staphylococcus aureus.
Périodique
Clinical Microbiology and Infection
Auteur(s)
Nahimana I., Francioli P., Blanc D.S.
ISSN
1198-743X
Statut éditorial
Publié
Date de publication
12/2006
Peer-reviewed
Oui
Volume
12
Numéro
12
Pages
1168-1174
Langue
anglais
Notes
Publication types: Comparative Study ; Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Résumé
Screening specimens were homogenised in saline 0.9% w/v before either direct inoculation or following enrichment in broth on three chromogenic media (MRSA-ID, CHROMagar MRSA and MRSA Select) and ORSAB medium for the detection of methicillin-resistant Staphylococcus aureus (MRSA). In total, 102 of 466 specimens yielded MRSA on at least one medium. After incubation for 16-18 h, the sensitivity was 51%, 59%, 47% and 65% on MRSA-ID, CHROMagar MRSA, ORSAB and MRSA Select, respectively, compared with 82%, 75%, 67% and 80%, respectively, after 42 h, and 93%, 95%, 79% and not tested, respectively, following broth enrichment. There were significantly more MRSA colonies on MRSA-Select after 16-18 h than on ORSAB or MRSA ID (p 0.001 and 0.0022, respectively), whereas there were more MRSA colonies after 42 h on MRSA-ID and MRSA-Select than on ORSAB (p 0.0004 and 0.012, respectively). The specificity of the media for identifying MRSA based on the colour of colonies after incubation for 16-18 h was 100%, 99%, 99% and 100%, respectively, compared with 98%, 97%, 98% and 98%, respectively, after 42 h, and 100%, 99%, 100% and not tested, respectively, following broth enrichment. The speed of detection (mean time to report a positive result) was 1.65, 1.72, 2.31 and 1.35 days, respectively. For each of the three media tested following enrichment, the use of an enrichment broth increased the detection rate of MRSA by 16-24%.
Mots-clé
Chromogenic Compounds/pharmacology, Culture Media/chemistry, Humans, Methicillin Resistance, Microbial Sensitivity Tests/methods, Population Surveillance/methods, Predictive Value of Tests, Prospective Studies, Sensitivity and Specificity, Staphylococcal Infections/microbiology, Staphylococcus aureus/drug effects, Staphylococcus aureus/growth &amp, development, Time Factors
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/01/2008 16:20
Dernière modification de la notice
09/05/2019 3:16
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