Chlamydia Screening

Abstract

Chlamydia is the most common sexually transmitted infection (STI) in the UK. It is asymptomatic in 70% of infected women and 50% of infected men and so often goes undiagnosed. Between 2000 and 2004, the rate of new diagnoses of chlamydia among people who attended Genito-urinary medicine clinics greatly increased from 116 to 175/100 000 (Fig. 1), with the largest increases in chlamydia rates occurring in the under 16 age group. However, the highest rates of chlamydia infection are seen in females aged between 16 and 19 years (1339/100 000) and males aged 20–24 years (1034/100 000). The National Chlamydia Screening Programme (NCSP) in England was established in 2003 with the objective of controlling chlamydia through the early detection and treatment of asymptomatic infection, thus preventing the development of sequelae and reducing onward disease transmission. Similar programmes are underway in the rest of the UK.