Escherichia coli in retail processed food

Area of Science:

• Food Microbiology
• Public Health
• Antimicrobial Resistance

Background:

• Escherichia coli is a key indicator of food safety and a potential human pathogen.
• Processed foods represent a significant route for microbial transmission to consumers.
• Understanding contamination sources and characteristics is crucial for risk assessment.

Purpose of the Study:

• To determine the prevalence and levels of Escherichia coli in retail processed foods.
• To investigate variations in contamination based on food type and season.
• To assess the antimicrobial resistance profiles of isolated Escherichia coli strains.

Main Methods:

• Analysis of 4,246 retail processed food samples for Escherichia coli.
• Quantification of bacterial load and identification of contamination levels.
• Antimicrobial susceptibility testing of isolated Escherichia coli strains.

Main Results:

• Overall, 12% of food samples were contaminated with Escherichia coli.
• Cakes and confectionery (28%) showed higher contamination rates than meat products (9%).
• Contamination peaked during summer months, with 27% of positive samples exceeding 10(3) E. coli/g. Meat-derived strains exhibited higher antibiotic resistance (14%) than confectionery strains (1%).

Conclusions:

• Processed foods, especially confectionery, are significant reservoirs for Escherichia coli.
• Seasonal factors influence E. coli contamination levels in foods.
• Antibiotic resistance in foodborne E. coli, particularly from meat, warrants attention for public health implications.