TABLE 2.

Plant Q products tested for L. monocytogenes from December 1998 to March 1999, organized by isolate serotype, product type, and sell-by date

ItemSell-by dateSourcePackage conditionSerotypePFGE patternE pattern designationWhere testedMPN (CFU/g)
AscIApaI
Franks06/03/98Patient's refrigeratoraOpened4bGX6A16.0002GX6A12.0057E3CDC<0.3
Franks11/25/98Patient's refrigeratoraOpened4bGX6A16.0002GX6A12.0004E2CDC<0.3
Franks11/25/98Patient's refrigeratoraOpened4bGX6A16.0002GX6A12.0004E2CDC<0.3
Franks12/16/98Plant QUnopened4bGX6A16.0002GX6A12.0004E2CDC<0.3
Franks12/20/98Patient's refrigeratorbOpened4bGX6A16.0002GX6A12.0002E0CDC<0.3
Deli meat (turkey)UnknownInstitution kitchenbOpened4bGX6A16.0002GX6A12.0002E0USDAd<0.3
Deli meat (chicken)UnknownPatient's refrigeratorcOpenedNontypeableGX6A16.0002GX6A12.0003E1CDC<0.3
Deli meat (turkey)12/23/98Plant QUnopened1/2aGX6A16.0014GX6A12.0016CDC2,200
Deli meat (turkey)02/17/99Plant QUnopened1/2aGX6A16.0014GX6A12.0016CDC0.8
Deli meat (mixed)02/17/99Plant QUnopened1/2aGX6A16.0014GX6A12.0016CDC<0.3
Franks12/16/98Plant QUnopenedNo L. monocytogenes isolatedCDC
Franks12/23/98Plant QUnopenedNo L. monocytogenes isolatedCDC
Franks02/17/99Plant QUnopenedNo L. monocytogenes isolatedCDC
Deli meat (turkey)12/23/98Plant QUnopenedNo L. monocytogenes isolatedCDC
Deli meat (turkey)12/23/98Plant QUnopenedNo L. monocytogenes isolatedCDC
  • a Patient symptomatic, no isolate recovered.

  • b Patient isolate and food isolate were indistinguishable by PFGE.

  • c No isolate; diagnoses confirmed by serology.

  • d USDA: U.S. Department of Agriculture.