Helicobacter pylori is:

A. gram negative, has flagella, coccus

B. gram positive, no flagella, "spiral-shaped" rod

C. gram negative, has flagella, "spiral-shaped" rod

D. gram positive, lacks flagella, coccus

Option C

Explanation:

The Helicobacter pylori is a gram negative bacterium that normally presents a spiral shaped curved rod in the natural habitat within the human host, but it can converts into a coccoid shape when faced with detrimental environmental circumstances. It also possess flagella providing motility

Answer: Option C.

Explanation:

Helicobacter pylori is a gram negative rod bacterium that is helical shaped, has flagella, and require oxygen to survive. It is commonly found in the digestive system of man and can live their for years. These bacteria feed on the intestine lining there by causing sores or ulcers, gastritis irritations or inflammation of the digestive tracts. Their Infections can also lead to stomach cancer.

They are normal caused or enter the digestive tract through mouth contact or faecal means when a person did not wash his hand properly after defecating. It is also spread through contaminated water and food.