What type of bacteria is spiral or corkscrew-shaped and can cause diseases such as syphilis?

The spiral or corkscrew-shaped bacteria that can cause diseases such as syphilis belong to the category known as spirilla. These bacteria have a distinctive helical structure, allowing them to move in a corkscrew motion, which is crucial for their ability to invade host tissues. One of the most well-known members of this group is Treponema pallidum, the organism responsible for syphilis. Understanding the shape and movement of different bacteria helps in identifying them and knowing the diseases they can cause.

The other types of bacteria mentioned have different shapes and characteristics; for instance, staphylococci are usually spherical and cluster together, while streptococci are also spherical but form chains. Bacilli, on the other hand, are rod-shaped bacteria. These unique forms of bacteria perform different functions and cause different diseases, highlighting the importance of recognizing their specific characteristics.