PMID- 8760954 OWN - NLM STAT- MEDLINE DCOM- 19960925 LR - 20190516 IS - 0950-2688 (Print) IS - 0950-2688 (Linking) VI - 117 IP - 1 DP - 1996 Aug TI - Occurrence of Listeria species in prepacked retail sandwiches. PG - 89-93 AB - A survey of 725 prepacked sandwiches was conducted examining for the presence on enrichment, and by plate count, of Listeria species. Sandwiches were found to contain Listeria sp. more frequently than their component foods. Chicken, beef and bacon fillings were associated with more frequent isolation. Salad also was associated with more frequent isolation, but the increase was not significant. On enrichment, over 15% of sandwiches contained Listeria species. L. innocua and L. monocytogenes were the only species isolated by plate count at numbers > or = 100 cfu/g (1.5% of total samples). Potentially hazardous levels of L. monocytogenes (defined as > or = 10(3) cfu/g) were found in two sandwiches examined (0.3%), indicating that although Total Viable Counts (TVCs) may often be high, the risk of listeriosis to vulnerable individuals from sandwiches is relatively low. It is important to distinguish the risk of consuming potentially hazardous levels of a pathogen in food from the risk of contracting illness as a result of such an event. FAU - Wilson, I G AU - Wilson IG AD - Northern Ireland Public Health Laboratory, Bacteriology Department, Belfast City Hospital, UK. LA - eng PT - Journal Article PL - England TA - Epidemiol Infect JT - Epidemiology and infection JID - 8703737 SB - IM MH - Eggs/microbiology MH - *Food Microbiology MH - Food Packaging MH - Listeria/*isolation & purification MH - Listeria monocytogenes/isolation & purification MH - Meat/microbiology MH - Retrospective Studies PMC - PMC2271682 EDAT- 1996/08/01 00:00 MHDA- 1996/08/01 00:01 PMCR- 1997/08/01 CRDT- 1996/08/01 00:00 PHST- 1996/08/01 00:00 [pubmed] PHST- 1996/08/01 00:01 [medline] PHST- 1996/08/01 00:00 [entrez] PHST- 1997/08/01 00:00 [pmc-release] AID - 10.1017/s0950268800001163 [doi] PST - ppublish SO - Epidemiol Infect. 1996 Aug;117(1):89-93. doi: 10.1017/s0950268800001163.