A positive control using
104 copies of gDNA of L. monocytogenes 1/2a strain ATCC 51772 or
S. enterica subsp. enterica Enteritidis (Belgian CNR Salmonella ref
H.V.6.32) from pure strains extracted with the DNeasy® Blood and tissue
Extraction kit (Qiagen) was included in each qPCR reaction