Midichloriaceae
"''Candidatus'' Midichloriaceae" is a family of bacterium, bacteria, included in the order Rickettsiales. No member of this family has been cultured in the laboratory, so the entire family has been given the status ''candidatus''. References

Rickettsiales {{alphaproteobacteria-stub ...
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Midichloria
"''Candidatus'' Midichloria" is a ''candidatus'' genus of Gram-negative, non-endospore-forming bacteria, with a bacillus shape around 0.45 µm in diameter and 1.2 µm in length. First described in 2004 with the temporary name IricES1, "''Candidatus'' Midichloria" species are symbionts of several species of hard ticks (''e.g.'', ''Ixodes ricinus'' and ''Ixodes uriae'' of the Ixodidae family). They live in the cells of the ovary of the females of this tick species. These bacteria have been observed in the mitochondrion, mitochondria of the host cells, a trait that has never been described in any other symbiont of animals. "''Candidatus'' Midichloria" bacteria seem to consume the mitochondria they parasitize, possibly using them as a source of energy and/or molecules to multiply. The interaction of these symbionts with their host is currently unknown, though the 100% prevalence in the females of the host tick suggests a Mutualism (biology), mutualistic association. Although ...
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