Shiga Toxin-Producing E. coli in Animals: Detection, Characterization, and Virulence Assessment

Area of Science:

• Veterinary microbiology
• Food safety
• Public health

Background:

• Cattle and ruminants are key reservoirs for Shiga toxin-producing Escherichia coli (STEC).
• Swine can carry STEC, with specific strains causing edema disease in piglets.
• The pathogenic potential of STEC in humans is variable and unpredictable.

Purpose of the Study:

• To present diagnostic workflows for assessing STEC prevalence, colonization magnitude, and duration in livestock.
• To provide detailed protocols for STEC detection and typing.
• To evaluate the relative virulence of detected STEC strains.

Main Methods:

• General diagnostic workflows for livestock sampling.
• Detailed protocols for STEC detection (genetic and phenotypic).
• STEC typing methods to assess virulence.

Main Results:

• Established workflows for STEC prevalence assessment in livestock.
• Detailed methodologies for STEC identification and characterization.
• Framework for evaluating STEC virulence in animal hosts.

Conclusions:

• Effective diagnostic strategies are crucial for managing STEC in livestock.
• Understanding STEC prevalence and virulence in animals informs public health risk.
• This chapter provides essential tools for STEC surveillance and control programs.