The Swedish new variant of Chlamydia trachomatis (nvCT) remains undetected by many European laboratories as revealed in the recent PCR/NAT ring trial organised by INSTAND e.V., Germany Reischl, U and Straube, E and Unemo, M, Eurosurveillance, 14, 19302 (2009), https://doi.org/10.2807/ese.14.32.19302-en