Bacteria species | MR test | VP test | Indole test | Citrate test |
Escherichia coli | + | + | − | − |
Klebsiella spp. | − | − | + | + |
Shigella spp. | − | + | − | − |
Salmonella spp. | − | + | − | + |
Enterobacter spp. | − | − | + | + |