The use of the Seward Stomacher in preparing samples for the assessment of microbial populations in the manufacture of vacuum-packaged ready-to-eat roast beef and in a related production plant.
Some microbiological criteria were monitored for 6 months in vacuum-packaged roast beef (15 production batches), raw beef (10 batches), and other meat products (12 batches) produced Continue reading
A Stomacher® 400 was used to blend beef tissue as part of the comparison in Listeria monocytogenes recovery.
The study shows that there was no difference between blending and stomaching on the recovery of Listeria monocytogenes in beef tissue.
food microbiology red meat listeria monocytogenes stomacher 400
To enumerate L. monocytogenes, 0.1 M phosphate buffer was added to each
stomacher bag (5-g beef slice in 45 ml of phosphate buffer), and the contents were mixed in a Stomacher 400 for 2 minutes.
Stomaching, homogenizing, or stomaching followed by homogenizing lettuce treated with sanitizers resulted in recovery of similar numbers of L. monocytogenes, indicating that stomaching and homogenizing are equivalent in extracting cells.
food microbiology sanitizer evaluation lettuce listeria monocytogenes stomacher 400
The Stomacher® 80 was used to test tissue from mice. Place the Stomacher bag into the Stomacher, and run the Stomacher on high speed for 10 minutes. Mix the homogenate in the Stomacher bag.
clinical microbiology mouse spleen liver listeria monocytogenes stomacher 80