Enterobacteriaceae is a large group of Gram-negative bacilli. Some of the members in this group are common pathogens like Salmonella, E. coli, and Shigella. They are facultative anaerobes, capable of fermenting sugars. Many are motile by having flagella but few exceptions exist. All of the members of this family are not spore-formers.
Scientific classification of family Enterobacteriaceae
Several strains of this group are reported to develop anti-microbial resistance. E. coli sequence type 131 (ST 131) and K. pneumoniae ST 258 specifically, are resistance towards fluoroquinolone, cephalosporin, and carbapenem. Treatment for the urinary tract infection by E. coli using drug fluoroquinolone is now said to be inefficient in more than half patient, as opposed to when the drug was first introduced in early 1980s, where the resistance was zero.