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Comparison of the APTIMA CT and GC assays with the APTIMA combo 2 assay, the Abbott LCx assay, and direct fluorescent-antibody and culture assays for detection of Chlamydia trachomatis and Neisseria gonorrhoeae.
J Clin Microbiol. 2004 Jul; 42(7):3089-93.JC

Abstract

The Gen-Probe APTIMA Combo 2 (AC2) is a Food and Drug Administration-cleared nucleic acid amplification test (NAAT) for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae from urine and urogenital swab specimens. The Centers for Disease Control and Prevention have recommended confirmation of positive NAAT results in low-prevalence populations. APTIMA CT (ACT) and APTIMA GC (AGC) are two discrete NAATs for C. trachomatis and N. gonorrhoeae detection that are suitable for confirming AC2-positive results because they target different nucleic acid sequences. Our objective was to determine if ACT and AGC could be used as confirmatory tests for AC2 and to correlate the APTIMA assays with culture, direct fluorescent-antibody (DFA), and LCx CT and GC assays. Urine and swab specimens (1,304) were initially tested with either culture, DFA, or LCx, followed by AC2. A subset (675) was then tested with ACT and AGC. There was absolute concordance between ACT-AGC and AC2. LCx did not detect 1 of 14 AC2-ACT- and 1 of 6 AC2-AGC-positive urine samples, and it yielded one C. trachomatis- and one N. gonorrhoeae-positive swab result that were not detected by AC2 and ACT-AGC. Culture failed to detect 5 of 20 AC2-ACT and 3 of 4 AC2-AGC positives, and DFA missed 4 of 4 AC2-ACT positives. Thus, ACT and AGC relative sensitivity compared to that of AC2 was 100%. All APTIMA assays detected more confirmed positive results than culture, DFA, and LCx. The performance of APTIMA assays was not altered by the use of various swab types and by long-term storage of specimens. All APTIMA assays are highly sensitive and rapid. ACT and AGC can be recommended for confirmation of positive results from other NAATs, such as AC2 and LCx.

Authors+Show Affiliations

Specialty Laboratories, Santa Monica, CA 90404, USA. BBoyadzhyan@specialtylabs.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

15243065

Citation

Boyadzhyan, B, et al. "Comparison of the APTIMA CT and GC Assays With the APTIMA Combo 2 Assay, the Abbott LCx Assay, and Direct Fluorescent-antibody and Culture Assays for Detection of Chlamydia Trachomatis and Neisseria Gonorrhoeae." Journal of Clinical Microbiology, vol. 42, no. 7, 2004, pp. 3089-93.
Boyadzhyan B, Yashina T, Yatabe JH, et al. Comparison of the APTIMA CT and GC assays with the APTIMA combo 2 assay, the Abbott LCx assay, and direct fluorescent-antibody and culture assays for detection of Chlamydia trachomatis and Neisseria gonorrhoeae. J Clin Microbiol. 2004;42(7):3089-93.
Boyadzhyan, B., Yashina, T., Yatabe, J. H., Patnaik, M., & Hill, C. S. (2004). Comparison of the APTIMA CT and GC assays with the APTIMA combo 2 assay, the Abbott LCx assay, and direct fluorescent-antibody and culture assays for detection of Chlamydia trachomatis and Neisseria gonorrhoeae. Journal of Clinical Microbiology, 42(7), 3089-93.
Boyadzhyan B, et al. Comparison of the APTIMA CT and GC Assays With the APTIMA Combo 2 Assay, the Abbott LCx Assay, and Direct Fluorescent-antibody and Culture Assays for Detection of Chlamydia Trachomatis and Neisseria Gonorrhoeae. J Clin Microbiol. 2004;42(7):3089-93. PubMed PMID: 15243065.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of the APTIMA CT and GC assays with the APTIMA combo 2 assay, the Abbott LCx assay, and direct fluorescent-antibody and culture assays for detection of Chlamydia trachomatis and Neisseria gonorrhoeae. AU - Boyadzhyan,B, AU - Yashina,T, AU - Yatabe,J H, AU - Patnaik,M, AU - Hill,C S, PY - 2004/7/10/pubmed PY - 2004/8/20/medline PY - 2004/7/10/entrez SP - 3089 EP - 93 JF - Journal of clinical microbiology JO - J Clin Microbiol VL - 42 IS - 7 N2 - The Gen-Probe APTIMA Combo 2 (AC2) is a Food and Drug Administration-cleared nucleic acid amplification test (NAAT) for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae from urine and urogenital swab specimens. The Centers for Disease Control and Prevention have recommended confirmation of positive NAAT results in low-prevalence populations. APTIMA CT (ACT) and APTIMA GC (AGC) are two discrete NAATs for C. trachomatis and N. gonorrhoeae detection that are suitable for confirming AC2-positive results because they target different nucleic acid sequences. Our objective was to determine if ACT and AGC could be used as confirmatory tests for AC2 and to correlate the APTIMA assays with culture, direct fluorescent-antibody (DFA), and LCx CT and GC assays. Urine and swab specimens (1,304) were initially tested with either culture, DFA, or LCx, followed by AC2. A subset (675) was then tested with ACT and AGC. There was absolute concordance between ACT-AGC and AC2. LCx did not detect 1 of 14 AC2-ACT- and 1 of 6 AC2-AGC-positive urine samples, and it yielded one C. trachomatis- and one N. gonorrhoeae-positive swab result that were not detected by AC2 and ACT-AGC. Culture failed to detect 5 of 20 AC2-ACT and 3 of 4 AC2-AGC positives, and DFA missed 4 of 4 AC2-ACT positives. Thus, ACT and AGC relative sensitivity compared to that of AC2 was 100%. All APTIMA assays detected more confirmed positive results than culture, DFA, and LCx. The performance of APTIMA assays was not altered by the use of various swab types and by long-term storage of specimens. All APTIMA assays are highly sensitive and rapid. ACT and AGC can be recommended for confirmation of positive results from other NAATs, such as AC2 and LCx. SN - 0095-1137 UR - https://www.unboundmedicine.com/medline/citation/15243065/Comparison_of_the_APTIMA_CT_and_GC_assays_with_the_APTIMA_combo_2_assay_the_Abbott_LCx_assay_and_direct_fluorescent_antibody_and_culture_assays_for_detection_of_Chlamydia_trachomatis_and_Neisseria_gonorrhoeae_ L2 - http://jcm.asm.org/cgi/pmidlookup?view=long&pmid=15243065 DB - PRIME DP - Unbound Medicine ER -