Spirilla are spiral bacterias that are gram-negative and are found in stagnant fresh water. They are the cause of syphilis disease. Thus, option C is correct.
What is syphilis?
Syphilis is a disease caused by bacteria transmitted generally through physical contact and affects the genitals and mouth. It is a communicable disease that passes from the contact of the fluid from the sores.
The Spirilla bacteria causes ulcers and sores filled with fluid in certain areas of the body that can be cured by antibiotic treatment.
Therefore, Spirilla cause syphilis.
Learn more about syphilis here:
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