Mycoplasma Bacteria
Mycoplasma bacteria are atypical bacteria in the sense that they are the smallest known free-living bacteria in the world, and unlike other bacteria, they do not have a cell wall. This makes them distinct from other bacteria, as they are much more resistant to antibiotics. Mycoplasma bacteria can cause a range of diseases in humans, including respiratory illnesses, urinary tract infections, and even meningitis.
Rickettsia Bacteria
Rickettsia bacteria are atypical bacteria as they are obligate intracellular parasites, meaning they can only survive inside living cells. These bacteria are responsible for causing a range of diseases in humans, such as Rocky Mountain spotted fever, typhus, and Q fever. Rickettsia bacteria are spread by insect vectors, such as fleas, lice, and ticks. As they are obligate intracellular parasites, they cannot be treated with antibiotics, and instead must be treated with antibiotics that target the vector that is spreading the infection.