Algorithm to differentiate between chlamydia re-infection, treatment failure and persistent infection [adapted from Batteiger et al (2009)] [<b>6</b>].

<p>N/A = Serovar result not available.</p

Kaplan Meier curve showing proportion remaining free from chlamydia re-infection over time among a cohort of sexually active 16 to 25 year old women.

<p>Kaplan Meier curve showing proportion remaining free from chlamydia re-infection over time among a cohort of sexually active 16 to 25 year old women.</p

Demographic and behavioural factors associated with chlamydia incident and re-infection among a cohort of sexually active 16 to 25 year old women.

*<p> <b>Analysis of incident infections includes re-infection.</b></p>a<p> <b> = confidence interval;</b></p>b<p> <b> = adjusted for age, employment, clinic type, number of new partners and recent antibiotic use;</b></p>c<p> <b> = adjusted for clinic type;</b></p>d<p> <b> = previous positive chlamydia test reported on questionnaire or diagnosed at time of recruitment into the study.</b></p

Kaplan Meier curve showing proportion remaining uninfected with incident chlamydia infection over time among a cohort of sexually active 16 to 25 year old women.

<p>Kaplan Meier curve showing proportion remaining uninfected with incident chlamydia infection over time among a cohort of sexually active 16 to 25 year old women.</p

Organism load per 100 cells during episodes of chlamydia re-infection^* among a cohort of sexually active 16 to 25 year old women.

*<p> <b>The time interval between the diagnoses was 3 to 6 months.</b></p>a<p> <b> = Excludes 2 people with missing organism load results.</b></p

Comparison of chlamydia organism load at first diagnosis between women who had a negative repeat rest and women who had a positive repeat test of the same serovar among a cohort of sexually active 16 to 25 year old women [shaded box = interquartile range;

<p>Comparison of chlamydia organism load at first diagnosis between women who had a negative repeat rest and women who had a positive repeat test of the same serovar among a cohort of sexually active 16 to 25 year old women [shaded box = interquartile range; black line in box = median value; T bars = range of values].</p

Comparison of chlamydia organism load for prevalent versus incident (excluding re-infection) and re-infection among a cohort of sexually active 16 to 25 year old women [shaded box = interquartile range; black line in box = median value; T bars = range of

<p>Comparison of chlamydia organism load for prevalent versus incident (excluding re-infection) and re-infection among a cohort of sexually active 16 to 25 year old women [shaded box = interquartile range; black line in box = median value; T bars = range of values].</p

Chlamydia trachomatis serovars and genotypic variants detected in positive samples among a cohort of sexually active 16 to 25 year old women.

a<p> <b> = E variant has 100% homology to Genbank sequence GU903922 (C. trachomatis strain 1969 from Australian male population);</b></p>b<p> <b> = G variant has 100% homology to Genbank sequence FJ261928 (G/IU-FW0267);</b></p>c<p> <b> = N/A: serovar unable to be determined.</b></p