The cobas® Strep A Nucleic acid test for use on the cobas® Liat System (cobas® Liat Strep A) is a qualitative in vitro diagnostic test for the detection of Streptococcus pyogenes A (Group β-hemolytic Streptococcus, Strep A) in throat swab specimens from patients with signs and symptoms of pharyngitis. The cobas® Liat Strep A Assay utilizes nucleic acid purification and polymerase chain reaction (PCR) technology to detect Streptococcus pyogenes by targeting a segment of the Streptococcus pyogenes genome.