Hence a considerable proportion of "non-specific" genital infection is related to Chlamydia. The new developments will enable us to begin to define how big this proportion is; to study control groups; to determine if any of the Chlamydia are non-pathogenic in the eye, genital tract, or elsewhere; and to study further special forms of disease such as Reiter's disease, abacterial pyuria, proctitis, and salpingitis. Thus there is evidence already that salpingitis commonly occurs in the mothers of babies suffering from ophthalmia neonatorum due to TRIC agent.'03 130 The culture of specimens obtained at laparoscopy should show whether Chlamydia is present in the affected fallopian tubes or not. Such studies will lay the foundations for defined assessment of treatment for disease due to Chlamydia.It would be surprising if there were no other agent concerned as a cause of NSU; therefore it will be of particular interest to test for other agents those patients in whom efficient tests (cell culture and immunological studies) for Chlamydia have given negative results.