Abstract:
:Surveillance for vancomycin resistant enterococci (VRE) by culture can be labour intensive and time consuming. We have developed a multiplex polymerase chain reaction (MPCR) which can be performed directly on the clinical specimen. The assay allows sensitive detection of enterococci with vanA - and vanB -mediated resistance to vancomycin. DNA was purified from stool and rectal specimens using the XTRAX(TM)DNA Extraction Kit (Gull Labs). Multiplex PCR amplified vanA and vanB targets were detected using a microtiter plate EIA. Two-hundred specimens were tested by routine culture and MPCR. Culture identified 44 VRE isolates and MPCR detected 38 of the 44 culture positives. Multiplex PCR detected three additional positive VRE specimens missed by culture for a sensitivity and specificity of 86.4 and 98.1%, respectively. When the presence of PCR inhibitors was addressed in the six culture positive/MPCR negative specimens, four additional VRE positive specimens were detected. Performing MPCR on the original specimens and on a 1:10 dilution of all specimens to minimize the effect of inhibitors gave a sensitivity and specificity of 95.5 and 98.1%, respectively. Multiplex PCR with confirmation by microtiter plate hybridization could be completed in 8 h compared with 24-48 h required for culture.
journal_name
Mol Cell Probesjournal_title
Molecular and cellular probesauthors
Petrich AK,Luinstra KE,Groves D,Chernesky MA,Mahony JBdoi
10.1006/mcpr.1999.0250subject
Has Abstractpub_date
1999-08-01 00:00:00pages
275-81issue
4eissn
0890-8508issn
1096-1194pii
S0890850899902505journal_volume
13pub_type
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