Chlamydia trachomatis samples testing falsely negative in the Aptima Combo 2 test in Finland, 2019

: Kaisu Rantakokko-Jalava, Kati Hokynar, Niina Hieta, Anniina Keskitalo, Pia Jokela, Anna Muotiala, T. Sakari Jokiranta, Rutta Kuusela, Hannu Sarkkinen, Janne Aittoniemi, Tytti Vuorinen, Antti J. Hakanen, Mirja Puolakkainen

Publisher: EUR CENTRE DIS PREVENTION & CONTROL

: 2019

: Eurosurveillance

: EUROSURVEILLANCE

: ARTN 1900298

: 24

: 22

: 2

: 5

: 1560-7917

DOI: https://doi.org/10.2807/1560-7917.ES.2019.24.22.1900298(external)

: https://research.utu.fi/converis/portal/detail/Publication/41233824(external)

Since February 2019, over 160 Chlamydia trachomatis (CT) cases testing negative or equivocal by Aptima Combo 2 (AC2) but positive by Aptima CT test run with Panther instruments occurred in Finland. The AC2 test targets chlamydial 23S rRNA while the CT test targets 16S rRNA. Sequencing of 10 strains revealed a nucleotide substitution in 23S rRNA. The significance of this for the failure of the AC2 test to detect the variant is not yet known.

Eurosurveillance_article.pdf