Enterobacteriaceae are a large family of Gram-negative bacteria that includes a number of pathogens such as Klebsiella, Enterobacter, Citrobacter, Salmonella, Escherichia coli, Shigella, Proteus, Serratia and other species.

Is Enterobacteriaceae Gram positive or negative?

INTRODUCTION. The Enterobacteriaceae are a large, heterogeneous group of gram-negative rods whose natural habitat is the intestinal tract of humans and animals. The family includes many genera (Escherichia, Shigella, Salmonella, Enterobacter, Klebsiella, Serratia, Proteus, and others).

Can Enterobacteriaceae be Gram positive?

Enterobacteriaceae are Gram-negative, rod-shaped facultative anaerobes.