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The Illumina MiSeqDx Cystic Fibrosis 139-Variant Assay is a qualitative in vitro diagnostic system used to simultaneously detect 139 clinically relevant cystic fibrosis disease-causing mutations and variants of the cystic fibrosis transmembrance regulator (CFTR) gene in genomic DNA isolated from human peripheral whole blood specimens. The variants include those recommended in 2004 by the American College of Medical Genetics (ACMG) and in 2011 by the American College of Obstetricians and Gynecologists (ACOG). The test is intended for carrier screening in adults of reproductive age, in confirmatory diagnostic testing of newborns and children, and as an initial test to aid in the diagnosis of individuals with suspected cystic fibrosis. The results of this test are intended to be interpreted by a board-certified clinical molecular geneticist or equivalent and should be used in conjunction with other available laboratory and clinical information. This test is not indicated for use for newborn screening, fetal diagnostic testing, pre-implantation testing, or for stand-alone diagnostic purposes. The test is intended to be used on the Illumina MiSeqDxTM Instrument.

The Illumina MiSeqDx Cystic Fibrosis 139-Variant Assay consists of library preparation and sample indexing reagents, sequencing reagents and consumables, MiSeqDx instrument and data analysis software. Testing begins with genomic DNA from a peripheral whole blood sample. The genomic DNA is processed through the library preparation steps, which specifically amplifies the intended genomic regions of each sample while also adding the indexes for sample identification. Flow cell capture sequences are also added to the amplified products. The resulting sample libraries are then transferred into a MiSeqDx reagent cartridge which contains all of the reagents required for cluster generation and sequencing (Sequencing By Synthesis). The MiSeqDx Cartridge, MiSeqDx Flow Cell, and MiSeqDx SBS Solution (PR2) are then inserted into the MiSeqDx instrument, which performs cluster generation, sequencing and data analysis.