Laboratory based surveillance of Salmonella isolates serotyped at 4 state health departments (Illinois, Minnesota, Michigan and Wisconsin) led to the identification of a multistate outbreak of salmonellosis in 1990. One hundred seventy six cases of S. Javiana were identified.

Community based case-control studies and product traceback implicated consumption of tomatoes from a single South Carolina tomato packer. Contamination likely occurred at the packing shed where field grown tomatoes were dumped into a common water bath. The tomato packer was identified as the source of contaminated tomatoes in an outbreak that occurred in 1993.