Chlamydia can refer to:* the genus Chlamydia (bacterium) Chlamydia infection, which is caused by bacteria in the genus The airborne, respiratory infection previously known as Chlamydia pneumonaie, but now known as Chlamydophila pneumoniae In addition, you may be looking for: species formerly included in the genus Chlamydia, but now included in the genus Chlamydophila.… (More on Chlamydia)