Where does chlamydia originate from because I cannot find any information on it recorded anywhere?

STD, evolved with us. Disease causing bacteria evolved with humans as we ourselves evolved. Chlamydia and other STDs adapted to the genital tract and transmission by sex. If you have chlamydia, you had sex with an infected person, who in turn had sex with another infected partner. Your sex partner(s) also need treatment. For expert care, Australia's sexual health centres probably are the world's best STD clinic system.