Enterobacteriaceae enterobacteriaceae v enteric gram-negative rods enteric bacteria More than 50 genera and 120 AA/3=2m< enteric bacilli √ coliforms 怜 species have been defined enterobacteriaceae  enteric gram-negative rods  enteric bacteria  enteric bacilli  coliforms Enterobacteriaceae More than 50 genera and 120 species have been defined