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Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Mollicutes
Order: Mycoplasmatales
Family: Mycoplasmataceae
Genus: Mycoplasma
Nowak 1929

M. gallisepticum
M. genitalium
M. haemofelis
M. hominis
M. hyopneumoniae
M. ovipneumoniae
M. pneumoniae

Mycoplasma is a genus of bacteria. They are parasitic, pathogenic microorganisms which lack a true cell wall. They are gram-negative, and need sterols such as cholesterol for growth. In humans, M. genitalium causes urethritis, and M. pneumoniae is an important cause of pneumonia.