Evidence for daptomycin Etest lot-related MIC elevations for Staphylococcus aureus
Abstract MIC testing was performed simultaneously by Etest and broth microdilution (BMD) on 587 Staphylococcus aureus isolates submitted by local laboratories to a reference laboratory for confirmatory testing (May 2005 to July 2008). Testing bias was assessed for Etest to BMD MIC ratios. Categoric...
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| Veröffentlicht in: | Diagnostic microbiology and infectious disease 2009-11, Vol.65 (3), p.306-311 |
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| creator | Friedrich, Lawrence Thorne, Grace Steenbergen, Judith N Anastasiou, Diane Koeth, Laura |
| description | Abstract MIC testing was performed simultaneously by Etest and broth microdilution (BMD) on 587 Staphylococcus aureus isolates submitted by local laboratories to a reference laboratory for confirmatory testing (May 2005 to July 2008). Testing bias was assessed for Etest to BMD MIC ratios. Categoric and essential agreement, very major (BMD nonsusceptible, Etest susceptible), and major (BMD susceptible, Etest nonsusceptible) errors were evaluated. Agar and broth calcium concentrations were consistent with current Clinical and Laboratory Standards Institute and manufacturer recommendations. There was a consistent bias for higher Etest MIC values compared with BMD. Ratios ranged from 0.25 to 4 (average 1.3), with substantial variability noted among the 8 different Etest lots tested. Overall, 6% of all ratios were >2.0. Categoric agreement and essential agreement among the 8 Etest lots ranged from 73% to 96% and 74% to 100%, respectively; very major errors ranged from 3% to 9%, and major errors ranged from 6% to 35%. However, most of the discrepancies were limited to 3 Etest lots. |
| doi_str_mv | 10.1016/j.diagmicrobio.2009.07.012 |
| format | Article |
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Testing bias was assessed for Etest to BMD MIC ratios. Categoric and essential agreement, very major (BMD nonsusceptible, Etest susceptible), and major (BMD susceptible, Etest nonsusceptible) errors were evaluated. Agar and broth calcium concentrations were consistent with current Clinical and Laboratory Standards Institute and manufacturer recommendations. There was a consistent bias for higher Etest MIC values compared with BMD. Ratios ranged from 0.25 to 4 (average 1.3), with substantial variability noted among the 8 different Etest lots tested. Overall, 6% of all ratios were >2.0. Categoric agreement and essential agreement among the 8 Etest lots ranged from 73% to 96% and 74% to 100%, respectively; very major errors ranged from 3% to 9%, and major errors ranged from 6% to 35%. 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Psychology ; Humans ; Infectious Disease ; Infectious diseases ; Internal Medicine ; Medical sciences ; Methicillin-Resistant Staphylococcus aureus - drug effects ; Microbial Sensitivity Tests ; Microbiology ; Miscellaneous ; MRSA ; Staphylococcal Infections - microbiology ; Staphylococcus aureus ; Staphylococcus aureus - drug effects ; Susceptibility testing</subject><ispartof>Diagnostic microbiology and infectious disease, 2009-11, Vol.65 (3), p.306-311</ispartof><rights>Elsevier Inc.</rights><rights>2009 Elsevier Inc.</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c495t-99055896782cb0b27b39b9f804af74a73fd41d362fbba36e6d8caaac5ea02d783</citedby><cites>FETCH-LOGICAL-c495t-99055896782cb0b27b39b9f804af74a73fd41d362fbba36e6d8caaac5ea02d783</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0732889309002910$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22080881$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19762196$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Friedrich, Lawrence</creatorcontrib><creatorcontrib>Thorne, Grace</creatorcontrib><creatorcontrib>Steenbergen, Judith N</creatorcontrib><creatorcontrib>Anastasiou, Diane</creatorcontrib><creatorcontrib>Koeth, Laura</creatorcontrib><title>Evidence for daptomycin Etest lot-related MIC elevations for Staphylococcus aureus</title><title>Diagnostic microbiology and infectious disease</title><addtitle>Diagn Microbiol Infect Dis</addtitle><description>Abstract MIC testing was performed simultaneously by Etest and broth microdilution (BMD) on 587 Staphylococcus aureus isolates submitted by local laboratories to a reference laboratory for confirmatory testing (May 2005 to July 2008). Testing bias was assessed for Etest to BMD MIC ratios. Categoric and essential agreement, very major (BMD nonsusceptible, Etest susceptible), and major (BMD susceptible, Etest nonsusceptible) errors were evaluated. Agar and broth calcium concentrations were consistent with current Clinical and Laboratory Standards Institute and manufacturer recommendations. There was a consistent bias for higher Etest MIC values compared with BMD. Ratios ranged from 0.25 to 4 (average 1.3), with substantial variability noted among the 8 different Etest lots tested. Overall, 6% of all ratios were >2.0. Categoric agreement and essential agreement among the 8 Etest lots ranged from 73% to 96% and 74% to 100%, respectively; very major errors ranged from 3% to 9%, and major errors ranged from 6% to 35%. 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Psychology</subject><subject>Humans</subject><subject>Infectious Disease</subject><subject>Infectious diseases</subject><subject>Internal Medicine</subject><subject>Medical sciences</subject><subject>Methicillin-Resistant Staphylococcus aureus - drug effects</subject><subject>Microbial Sensitivity Tests</subject><subject>Microbiology</subject><subject>Miscellaneous</subject><subject>MRSA</subject><subject>Staphylococcal Infections - microbiology</subject><subject>Staphylococcus aureus</subject><subject>Staphylococcus aureus - drug effects</subject><subject>Susceptibility testing</subject><issn>0732-8893</issn><issn>1879-0070</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNklGL1DAQx4Mo3nr6FaQI6lPrJGmbxAdB1lUPTgRPn0OaTDVrt9lL2oX99qbuouKD-DQvv5n585sh5AmFigJtX2wr583XnbcxdD5UDEBVICqg7A5ZUSlUCSDgLlmB4KyUUvEL8iClLWRC1XCfXFAlWkZVuyKfNgfvcLRY9CEWzuynsDtaPxabCdNUDGEqIw5mQld8uFoXOODBTD6M6Sd_M5n9t-MQbLB2ToWZI87pIbnXmyHho3O9JF_ebj6v35fXH99drV9fl7ZWzVQqBU0jVSsksx10THRcdaqXUJte1Ebw3tXU8Zb1XWd4i62T1hhjGzTAnJD8kjw_zd3HcDvntHrnk8VhMCOGOWnBa5B1o3gmn_2TZBQUpw3N4MsTmNWmFLHX--h3Jh41Bb2411v9p3u9uNcgdDabmx-ft8zdDt3v1rPsDDw9AyZZM_TRjNanXxxjIEHKJcWbE4fZ3sFj1Mn65UbOR7STdsH_X55Xf42xgx993vwdj5i2YY5jvo-mOjEN-mb5luVZQAEwRYH_AGGuvnM</recordid><startdate>20091101</startdate><enddate>20091101</enddate><creator>Friedrich, Lawrence</creator><creator>Thorne, Grace</creator><creator>Steenbergen, Judith N</creator><creator>Anastasiou, Diane</creator><creator>Koeth, Laura</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>C1K</scope><scope>7X8</scope></search><sort><creationdate>20091101</creationdate><title>Evidence for daptomycin Etest lot-related MIC elevations for Staphylococcus aureus</title><author>Friedrich, Lawrence ; Thorne, Grace ; Steenbergen, Judith N ; Anastasiou, Diane ; Koeth, Laura</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c495t-99055896782cb0b27b39b9f804af74a73fd41d362fbba36e6d8caaac5ea02d783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Anti-Bacterial Agents - pharmacology</topic><topic>Bacteriology</topic><topic>Biological and medical sciences</topic><topic>Daptomycin</topic><topic>Daptomycin - pharmacology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Infectious Disease</topic><topic>Infectious diseases</topic><topic>Internal Medicine</topic><topic>Medical sciences</topic><topic>Methicillin-Resistant Staphylococcus aureus - drug effects</topic><topic>Microbial Sensitivity Tests</topic><topic>Microbiology</topic><topic>Miscellaneous</topic><topic>MRSA</topic><topic>Staphylococcal Infections - microbiology</topic><topic>Staphylococcus aureus</topic><topic>Staphylococcus aureus - drug effects</topic><topic>Susceptibility testing</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Friedrich, Lawrence</creatorcontrib><creatorcontrib>Thorne, Grace</creatorcontrib><creatorcontrib>Steenbergen, Judith N</creatorcontrib><creatorcontrib>Anastasiou, Diane</creatorcontrib><creatorcontrib>Koeth, Laura</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Environmental Sciences and Pollution Management</collection><collection>MEDLINE - Academic</collection><jtitle>Diagnostic microbiology and infectious disease</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Friedrich, Lawrence</au><au>Thorne, Grace</au><au>Steenbergen, Judith N</au><au>Anastasiou, Diane</au><au>Koeth, Laura</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evidence for daptomycin Etest lot-related MIC elevations for Staphylococcus aureus</atitle><jtitle>Diagnostic microbiology and infectious disease</jtitle><addtitle>Diagn Microbiol Infect Dis</addtitle><date>2009-11-01</date><risdate>2009</risdate><volume>65</volume><issue>3</issue><spage>306</spage><epage>311</epage><pages>306-311</pages><issn>0732-8893</issn><eissn>1879-0070</eissn><coden>DMIDDZ</coden><abstract>Abstract MIC testing was performed simultaneously by Etest and broth microdilution (BMD) on 587 Staphylococcus aureus isolates submitted by local laboratories to a reference laboratory for confirmatory testing (May 2005 to July 2008). Testing bias was assessed for Etest to BMD MIC ratios. Categoric and essential agreement, very major (BMD nonsusceptible, Etest susceptible), and major (BMD susceptible, Etest nonsusceptible) errors were evaluated. Agar and broth calcium concentrations were consistent with current Clinical and Laboratory Standards Institute and manufacturer recommendations. There was a consistent bias for higher Etest MIC values compared with BMD. Ratios ranged from 0.25 to 4 (average 1.3), with substantial variability noted among the 8 different Etest lots tested. Overall, 6% of all ratios were >2.0. Categoric agreement and essential agreement among the 8 Etest lots ranged from 73% to 96% and 74% to 100%, respectively; very major errors ranged from 3% to 9%, and major errors ranged from 6% to 35%. However, most of the discrepancies were limited to 3 Etest lots.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><pmid>19762196</pmid><doi>10.1016/j.diagmicrobio.2009.07.012</doi><tpages>6</tpages></addata></record> |
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| subjects | Anti-Bacterial Agents - pharmacology Bacteriology Biological and medical sciences Daptomycin Daptomycin - pharmacology Fundamental and applied biological sciences. Psychology Humans Infectious Disease Infectious diseases Internal Medicine Medical sciences Methicillin-Resistant Staphylococcus aureus - drug effects Microbial Sensitivity Tests Microbiology Miscellaneous MRSA Staphylococcal Infections - microbiology Staphylococcus aureus Staphylococcus aureus - drug effects Susceptibility testing |
| title | Evidence for daptomycin Etest lot-related MIC elevations for Staphylococcus aureus |
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