“…Early in our studies it became apparent that the clinical appearances due to inclusion-positive chlamydial infections of the eye in London (Jones, 1965;Jones and others, 1966) extended right into the appearances which had been described as occurring with lymphogranuloma venereum (LGV) infections of the eye, giving a Parinaud's oculoglandular syndrome with gross conjunctivitis, episcJeritis, and painful and visible preauricular adenitis (Curth, Curth, and Sanders, 1940). This suggested that, until it became practicable to identify LGV agents in the laboratory and readily to distinguish them from TRIC agents, there was the possibility of confusing atypical forms of one infection with the other, or conversely of falsely naming LGV isolates as TRIC isolates, especially if they came from unusual sites.…”