Chlamydia Trachomatis IgM Antibody(CT IgM) Determination Kit (Fluorescence Immunochromatographic Assay) is an in vitro diagnostic test kit. hlamydia Trachomatis is an intracellular parasite pathogen that is similar in cell wall structure to gramnegative bacteria. It is the most common sexually transmitted disease (STD) in the US with more than 4 million cases reported annually. IgG and IgM antibodies to Chlamydia Trachomatis can be detected with 2-4 weeks after exposure.