The Coxiellaceae are a family in the order Legionellales.
Coxiella burnetii is the best-described species in this group.
The bacterium Rickettsiella melolonthae was initially assigned to the Coxiellaceae,
Various other Coxiellaceae lineages have so-far evaded cultivation efforts but have been characterized through culture-independent genomics and are present in both freshwater and diverse marine environments, likely with a host-associated lifestyle similar to that of Coxiella burnetti'.
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