When milk powder is examined for the presence of salmonellae using a volume of preenrichment medium three times or more that of the milkpowder, false-negative results may be obtained. Reconstitution for half an hour at room temperature using an amount of medium twice the volume of the milk powder, before further dilution and preenrichment, increased Salmonella recovery.

This content is only available as a PDF.

Author notes

1National Institute of Public Health.

2Agricultural University.

3Microbiological Quality Control.