rickettsia

As a proper noun rickettsia

is .

As a noun mycoplasma is

any infectious bacterium of the genus mycoplasma , often specifically.

As a proper noun rickettsia

is .

As a noun virus is

virus.

As nouns the difference between rickettsiae and rickettsia

is that rickettsiae is plural of rickettsia while rickettsia is any of a group of gram-negative bacteria, of the genus Rickettsia, carried as parasites by ticks, fleas and lice; they cause typhus and other diseases.

Chlanydias is likely misspelled.

Chlanydias has no English definition.

As a noun rickettsia

is any of a group of gram-negative bacteria, of the genus Rickettsia, carried as parasites by ticks, fleas and lice; they cause typhus and other diseases.