Published in Medical Letter on the CDC and FDA, June 7th, 2006
According to their report, "We found seven Listeria isolates, initially identified as isolates with the Xyl+ Rha- biotype of Listeria welshimeri by phenotypic tests, which exhibited discrepant genotypic properties in a well-validated Listeria species identification oligonucleotide microarray."
"The microarray gives results of these seven isolates being atypical hly-negative L. seeligeri isolates, not L. welshimeri isolates," said Dmitriy Volokhov and colleagues at the U.S. Food and Drug...
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