In 1885, Theodor Escherich first isolated Bacterium coli from children's fecal samples. After the 1920s, this bacterium underwent a name change and became known as Escherichia coli.

Food adulteration is classified as the intentional addition of a foreign or inferior quality substance or element; by replacing a more valuable substance or element with less valuable or inert ingredients.

Legionnaire's Disease, caused by Legionella pneumophila bacteria, is a severe illness. In Portugal, this bacterium was first detected in 1979 and is listed as a mandatory reportable disease.