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''Chlamydophila'' is a bacterial genus belonging to the family Chlamydiaceae, order Chlamydiales, class/phylum Chlamydiae. ==Taxonomy== ''Chlamydophila'' was recognized in 1999, with six species in ''Chlamydophila'' and three in the original genus, ''Chlamydia''. All Chlamydiae are anaerobic bacteria with a biphasic developmental lifecycle that depends on obligately intracellular growth in eukaryotic host cells. Prior to 1999, criteria for chlamydial species were not exclusive. For example, at that time genus Chlamydia = family Chlamydiaceae; ''C. psittaci'' were distinguished from ''C. trachomatis'' by sulfadiazine resistance, although not all ''C. psittaci'' were resistant; ''C. pneumoniae'' was classified by its appearance under electron microscopy (EM) and its ability to infect humans, although the EM appearance was found to differ from one research group to the next, and all of these species infected humans. The systematic taxonomy established for Chlamydiae in 1999 uses up-to-date, prevailing criteria for bacterial classification, including DNA-DNA reassociation, 16S and 23S ribosomal RNA gene similarity, sequence similarity clustering of protein coding genes, and genome size. Supporting criteria such as antigen detection, glycogen staining, host association, and EM morphology are also employed, depending on applicability and availability. In 1999, many ''Chlamydia'' strains were reorganized into the genus ''Chlamydophila''. Comparative genomic analyses have identified large numbers of signature proteins that are uniquely present in species from the genera ''Chlamydia'' and ''Chlamydophila'', supporting the distinctness of these genera. This view has been challenged by a more recent whole genome analysis leading to a proposal to "reunite the ''Chlamydiaceae'' into a single genus, ''Chlamydia''". To date, this nomenclature controversy has not been resolved. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chlamydophila」の詳細全文を読む スポンサード リンク
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