Definition of chlamydia in English:



  • A very small parasitic bacterium which, like a virus, requires the biochemical mechanisms of another cell in order to reproduce. Bacteria of this type cause various diseases including trachoma, psittacosis, and non-specific urethritis.

    • ‘The phenomenon of a high degree of antigenic cross reactivity within different serovars of C. trachomatis and different species of chlamydiae inducing cross-reactive antibodies makes interpretation difficult.’
    • ‘Several other organisms such as mycoplasma or chlamydia also can cause pneumonia.’
    • ‘Laboratory tests are carried out for gonococcus and sometimes trichomonas and chlamydia, depending on the technology available.’
    • ‘For example, if the herpes virus or chlamydia bacteria get into the eye, the symptoms tend to be more severe and last longer.’
    • ‘Because chlamydiae are bacteria, antibiotics can thwart the infections they produce.’


1960s: modern Latin (plural), from Greek khlamus, khlamud- cloak.