摘要：Between 30 May and 1 June 2001, 10 cases of Salmonella Bovismorbificans infection were reportedto Public Health Services, Queensland Health. Investigations included enhanced surveillance, caseinterviews, a matched case control study, environmental audit and microbiological testing of faecalisolates (phage typing) and implicated food products. Forty-one cases of S. Bovismorbificans infectionwere detected, 36 cases were phage type 32. A matched case control study identified that illness wasassociated with consumption of food from 15 outlets of a fast food chain, Company A (matched oddsratio [MOR] 17.5, 95% CI 2.0 –657.3, p = 0.004) and consumption of a particular product, Product X(MOR undefined, p < 0.001) in the week before onset of illness. Manufacturers of Product Xingredients were audited. Deficiencies were identified in equipment cleansing at the salad mixtureprocessing plant (Manufacturer M). A swab of food residue behind the cutting wheel rim of the lettuceshredder was positive for S. Bovismorbificans phage type 32. This appears to be the first reportedAustralian outbreak of salmonellosis associated with a lettuce product. The investigations suggestthat inadequate maintenance of cutting equipment to prepare lettuce ingredients for Product X byManufacturer M was a key factor in this statewide outbreak. The statewide nature of this outbreakdemonstrates the role of timely serovar identification of Salmonella isolates by a reference laboratoryas an aid to outbreak identification, and the importance of adherence to appropriate food safetyprocedures in the manufacture and preparation of mass produced food items for the public.
关键词：Salmonella;Bovismorbificans; outbreak; fast food; lettuce
