Which of the following is non-pathogenic bacteria of colon ?

Options

A. Escherichia coli
B. Balantidium coli
C. Entamoeba coli
D. Entamobius vermicularis

Answer

A

Explanation

Escherichia coli is the non-pathogenic bacteria of colon. It is the motile or non-motile organism which lives in the intestine of humans as the part of normal flora. One of the characteristics of Escherichia coli is the production of bacteriocins (colieins), a specific type of metabolite which is not only lethal to the organism of the same species but also to related organisms.
Balantidium coli results in inflammation of alimentary tract. Entamoeba coli causes amoebic dysentery. Enterobius vermicularis infection is known as oxyuriasis or enterobiosis.