Mycoplasma is a genus of bacteria that lack a cell wall. They can be parasitic or saprotrophic, with some considered to be pathogenic in humans.
mycoplasma do not have a cell wall
Mycoplasma
Mycoplasma lack cell walls. Therefore, any antibiotic that targets the cell wall of bacteria would be ineffective to mycoplasma. Examples are beta-lactam antibiotics such as penicillin. Beta-lactam antibiotics target the synthesis of peptidoglycan, an important component of the bacterial cell wall.
I believe the three smallest bacteria are Rickettia, Chlamydia, and Mycoplasma.
i think it's a little parasitic bacteria
mycoplasma, rickettsia and chlamydiae
As of now, the smallest bacteria on Earth are those belonging to Mycoplasma.
Mycoplasma Pneumoniae
Monera do not have nuclear membrane and they also lack membrane bound cellular organelles. This Monera includes bacteria, cyanobacteria, and mycoplasma. They are unicellular organisms and do not have a certain mode of nutrition.
What you are probably intending to ask is about mycoplasma. It is a common bacteria that causes infection of the lungs. This is also called mycoplasma pneumonia
Mycoplasma.
Mycoplasma Mycobacteria (incorrect) Chlamydia (added) Edit - Mycoplasma has no cell wall, therefore no peptidoglycan. Mycobacteria has a cell wall that contains peptidoglycan and stains poorly on gram stain due to a covering of mycolic acids. Chlamydia has a cell wall that contains NO peptidoglycan.