Question

Comma shaped bacteria are:

• A. Vibrio
• B. Cocci
• C. Spirilla
• D. Bacilli

Answer 1

The correct option is A Vibrio

• There are thousands of species of bacteria, and all of them have one of the following shapes. Some are rod- or stick-shaped and called bacilli. Examples of rod-shaped bacteria include E.coli, Salmonella, and Bacillus anthracis, which is the bacterium that causes anthrax in cattle.
• Rod-shaped bacteria include bent or curved rods. So, Vibrio is a curved bacillus, that causes cholera. Others are shaped like little balls and called cocci. Examples of bacteria with round cells include Staphylococcus, Streptococcus, and Neisseria (causes gonorrhea).
• Others still are twisted, helical or spiral in shape and called spirilla. These twisted cells can be flexible (Treponema, which causes syphilis) or rigid corkscrew shape like Campylobacter (the bacterium that causes food-borne illness).
• Some species of bacteria vary in shape; this is called pleomorphism. Variations and / or lack of rigid cell walls cause microbes like Mycoplasma, Corynebacterium, and Rhizobium to appear swollen, curved, or club-shaped.

So, the correct answer is 'vibrio'.