Fig. 1From: Evaluation of a Chlamydia trachomatis-specific, commercial, real-time PCR for use with ocular swabsSigmoid models representative of variation in amplification. Raw fluorescence results from samples processed using the FTD Vaginal swab kit. Sigmoid models representing: samples that did not amplify and do not fit a sigmoid model (a), samples that did not amplify but do fit a sigmoid model (b), and samples that did amplify and do fit a sigmoid model (c)Back to article page