1. Schachter, J. & Dawson, C.R. The epidemiology of trachoma predicts more blindness in the future. Scand. J. Infect. Dis. 69 (Suppl.), 55–62 (1990).
2. Piot, P. Van den Hoek, A.R., Van Damme, L. & Laga, M. Epidemiology and control of genital chlamydial infections. in Chlamydial Infections, (eds. Orfila, J. et al) 7–15 (Societa Editrice Esculapio, Bologna, 1994).
3. Taylor, H.R. et al. An animal model of trachoma. II. The importance of repeated reinfection. Invest. Ophthalmol. Vis. ScL 23, 507–515 (1982).
4. Weström, L. & Wölner-Hanssen, P. Pathogenesis of pelvic inflammatory disease. Genitourin. Med. 69, 9–17 (1993).
5. Stephens, R.S., Wagar, E. & Schoolnik, G. High resolution mapping of serovar-specific and common antigenic determinants of the major outer membrane protein of Chlamydia trachomatis. J. Exp. Med. 167, 817–831 (1988).