7.1 Organisms of interest

This course focuses on three common animal pathogens included in the list of thirteen priority bacterial pathogens for surveillance of the World Health Organisation (WHO) Global Antimicrobial Resistance Surveillance System (GLASS), and on two bacterial genera widely used in the monitoring of antimicrobial resistance (AMR) in farm animals (Table 6). Information about the GLASS programme can be found in the Introducing AMR surveillance systems course.

Table 6 Priority bacterial pathogens and genera focused on in this course
Animal pathogen Notes
GLASS pathogens Escherichia coli Common in poultry and livestock
Salmonella species Common in all production animals
Staphylococcus aureus Common in poultry, farmed ruminants and pigs
Used for AMR monitoring Enterococcus species particularly E. faecium and E. faecalis

Causes infections in humans and resistance is a particular problem

Can cause sporadic infections in farm animals

Campylobacter spp.

An important cause of human gastroenteritis which may result in antimicrobial use, especially C. jejuni and C. coli

C. fetus subsp. fetus and C. fetus subspecies venerealis cause infections in sheep and cattle

7 Isolation and identification of key pathogens of interest in terrestrial farmed animals

7.2 Escherichia coli