A taxonomic family within the order Enterobacteriales — many gram-negative rod-shaped bacteria including many pathogens.
a natural group of rod-shaped gram-negative bacteria, almost all of which happen typically or pathogenically in intestines of people along with other pets, plus some which develop in plants. The type genus is Escherichia. They are aerobic and facultatively anaerobic, and can even be motile or non-motile. Most are quickly cultured on artificial development media. Both pathogenic and non-pathogenic strains exist.