PREVALENCE OF HUMAN-HERPESVIRUS-6 ANTIBODY IN THE POPULATION OF BELEM, PARA, NORTHERN BRAZIL

A total of 497 serum samples obtained from residents of 2 neighbourhoo ds (Terra-Firme and Guama) in Belem, Para, Brazil was tested for the p resence of antibody to human herpesvirus 6 (HHV6), using an indirect i mmunofluorescence assay. The overall seroprevalence was 90%, with sero positivity rates ranging from 75% to 100% in the different age groups and sexes. There was a significant difference between the antibody pre valences in Terra-Firme and Guama, 94% and 87%, respectively (P=0.01). The geometric mean titres (GMT) of antibody to HHV6 declined from the first (less than or equal to 2 years) to the sixth (31-40 years) age groups, and slightly increased (GMT >50) among individuals older than 40 years.