Salmonella and Escherichia coli Prevalence in Meat and Produce Sold at Farmers’ Markets in Northern California

Alda F.A. Pires, James Stover, Esther Kukielka, Viktoria Haghani, Peiman Aminabadi, Thais de Melo Ramos, Michele T Jay-Russell

Research output: Contribution to journalArticlepeer-review


As the number of farmers’ markets and other direct-to-consumer marketing channels increases, it is crucial to understand the potential risks associated with consuming directly marketed animal products and fresh produce. The overall aim of this project was to assess the prevalence of Salmonella and Escherichia coli in animal products and produce sold at farmers’ markets in Northern California and to evaluate the food safety risks associated with consuming meat (e.g., beef, pork, and poultry) and fresh produce purchased from farmers’ markets. Animal products and produce were purchased from a total of 44 certified farmers’ markets in Northern California. Salmonella was found in 6 (1.8%) of 338 animal products and in 0 (0%) of 128 produce samples; E. coli was found in 40 (31.3%) of 128 fresh produce samples. E. coli concentration in produce ranged from 0 to 2.96, with an overall average of 0.13 log (most probable number þ 1)/100 mL. Salmonella isolates were resistant to nalidixic acid and tetracycline. The results from this study highlight the need for further training on mitigation strategies to reduce contamination of animal products and fresh produce by foodborne pathogens.

Original languageEnglish (US)
Pages (from-to)1934-1940
Number of pages7
JournalJournal of food protection
Issue number11
StatePublished - Nov 2020


  • Escherichia coli
  • Farmers’ markets
  • Produce
  • Raw meat
  • Raw poultry
  • Salmonella

ASJC Scopus subject areas

  • Food Science
  • Microbiology


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