Table 1.

Characteristics of Model Organisms

Bacterial species	Shape	Cell Wall	Model Organism
Salmonella enterica	Rod	Gram-negative	Rod-shaped gram-negative pathogenic bacteria such as enteropathogenic Escherichia coli and carbapenem-resistant Enterobacteriaceae
Listeria innocua	Rod	Gram-positive	Rod-shaped gram-positive pathogenic bacteria such as Listeria or Corynebacterium
Enterococcus faecalis	Cocci in chains	Gram-positive	Gram-positive diplococcus, representative of Enterococcus and Streptococcus, including vancomycin-resistant enterococci
Staphylococcus aureus	Cocci in clusters	Gram-positive	Gram-positive clustering cocci including methicillin-resistant Staphylococcus aureus