Which of the following is an example of a pathogenic Enterobacteriaceae?

Escherichia coli is a well-established example of a pathogenic organism within the Enterobacteriaceae family, which is a group of bacteria primarily found in the intestinal tract of humans and animals. This family includes a variety of genera and species that can be either non-pathogenic or pathogenic. Pathogenic strains of E. coli, such as enterohemorrhagic E. coli (EHEC) or enterotoxigenic E. coli (ETEC), can cause serious gastrointestinal illnesses, including diarrhea and urinary tract infections.

The other options listed are not members of the Enterobacteriaceae family. Listeria refers to the genus Listeria, which includes Listeria monocytogenes, known for causing listeriosis, primarily associated with contaminated food. Corynebacterium is a genus that includes pathogens such as Corynebacterium diphtheriae, responsible for diphtheria, but it is distinct from the Enterobacteriaceae. Streptococcus encompasses a diverse group of bacteria, including notable pathogens like Streptococcus pneumoniae, known for respiratory infections, but again, this bacterium does not fall under the Enterobacteriaceae family. Hence, Escherichia coli stands out as the correct example