- mycoplasma
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Prokaryotic microorganisms lacking cell walls, and therefore resistant to many antibiotics. Formerly known as pleuro-pneumonia-like organisms (PPLO). Mycoplasma pneumoniae is a causative agent of pneumonia in humans and some domestic animals. Troublesome contaminants of animal cell cultures, in which they may grow attached or close to cell surfaces, subtly altering properties of the cells, but escaping detection unless specifically monitored. Similar organisms, spiroplasms, cause various diseases in plants.
Dictionary of molecular biology. 2004.