Sex Transm Infect 84:77-78 doi:10.1136/sti.2007.029165
  • Letter
    • PostScript

Authors’ reply

  1. E M van der Snoek1,
  2. J M Ossewaarde2,
  3. W I van der Meijden1,
  4. P G H Mulder3,
  5. H B Thio1
  1. 1
    Department of Dermatology and Venereology
  2. 2
    Department of Medical and Infectious Diseases
  3. 3
    Institute of Epidemiology and Biostatics, Erasmus MC, Rotterdam, the Netherlands
  1. E M van der Snoek, Department of Dermatology and Venereology, Erasmus MC, Rotterdam, the Netherlands; e.vandersnoek{at}
  • Accepted 12 November 2007

In a recent paper we concluded that an elevated IgA antibody response and the age of the infected individual (a total sum score of 7 times IgA titre plus individual’s age ⩾50.0 years) appeared to be of diagnostic value for (early) detection of lymphogranuloma venereum (LGV) proctitis (Sex Transm Infect 2007;83:330–4). Statistical analyses showed that the use of this total sum score had high diagnostic accuracy. As published previously, over 85% of the Rotterdam population of patients with L2 proctitis reported symptoms (rectal discharge and bleeding) and more than 70% had clinical manifestations (discharge and perianal erythema).1

We agree with de Vries et al and acknowledge the need for “simple and affordable diagnostic procedures to screen the (asymptomatic) population at …