Other bacteria

Other bacteria - and have no cell walls. This latter...

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Other bacteria There are some exceptionally small forms of bacteria that can be seen only with the electron  microscope. The rickettsiae are one group. These ultramicroscopic organisms are usually  transmitted by arthropods such as fleas, ticks, and lice. They cause several human diseases  including Rocky Mountain spotted fever and typhus. Another type of ultramicroscopic bacteria is the chlamydiae. Like the rickettsiae, the chlamydiae can  be seen only with the electron microscope. In humans, chlamydiae cause several diseases, including  an eye infection called trachoma and a sexually transmitted disease called chlamydia. Probably the smallest forms of bacteria are the mycoplasmas. Mycoplasmas occur in many shapes 
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Unformatted text preview: and have no cell walls. This latter characteristic distinguishes them from the other bacteria (where cell walls are prominent). Mycoplasmas can cause a type of pneumonia. Another type of bacteria is the archaebacteria. Archaebacteria are ancient species of bacteria identified in recent years. They are separated from the other bacteria on the basis of their ribosomal structure and metabolic patterns. Archaebacteria are anaerobic species that use methane production as a key step in their energy metabolism. They are found in marshes and swamps. Some scientists believe there are two major subdivisions of bacteria: the Archaebacteria and all others, which they designate Eubacteria....
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