Clinical and laboratory study of first episode genital herpes in Singapore.

ABSTRACT

PIP: A prospective study of the epidemiology, clinical aspects, and laboratory features of 1st episode genital herpes was conducted in Middle Road Hospital, Singapore between June 1986-December 1987. A total of 68 patients were studied and there were more women than men in the study population; the ratio of females:males was 7.5:1. The peak incidence of 1st episode genital herpes was between 20-29 years of age. Specimens from 63 patients yielded positive culture for herpes simplex virus (HSV). HSV-1 was isolated from 21 patients (30.9%), HSV-2 from 41 patients (60.3%), and untyped HSV from 1 patient (1.5%). True primary genital herpes was diagnosed in 43 patients (68.3%) using a test for complement fixing antibodies to HSV. HSV-1 was found to be the causative agent in 18 (41.9%) of the true primary infection, HSV-2 in 24 (55.8%), and untyped HSV in 1 (2.3%). In comparison, HSV-1 was isolated in only 2 (10%) of the 20 patients with nonprimary 1st episode genital herpes; HSV-2 was found in 13 patients (65%), and the culture was negative in 5 (25%).