Figure 2.

Results of PCR analysis of Chlamydia trachomatis EB in synovial samples following DNA extraction by (a) alkaline lysis and (b) Chelex^®. On the y-axes concentration of Chlamydia trachomatis elementary bodies (EB)/ml are given. Each point on the graph indicates the detection limit of one serial dilution analysis. Numbers in boxes represent lowest reproducible detection limit of Chlamydia trachomatis EB/ml in synovial fluid.