Influenza virus A H5 RNA [Cycle Threshold #] in Specimen by NAA with probe detection 77605-4
LOINC Code
| LOINC code | 77605-4 | ||
|---|---|---|---|
| name | Influenza virus A H5 RNA [Cycle Threshold #] in Specimen by NAA with probe detection | ||
| description | The goose/Guangdong lineage H5 viruses emerged in the late 90s in Asia and subsequently became the only lineage of viruses known to be highly pathogenic to poultry and sustained in wild birds. The World Health Organization recognizes these viruses under a unified H5 clade nomenclature. Viruses from this lineage, specifically clade 2.3.4.4, were introduced into North American flyways in late 2014 via the Bering Strait into the Pacific flyway and again in late 2021 into the Atlantic flyway. [PMID:25855748] The NALHN influenza A molecular assay (matrix 2009) works well for the detection of this viral clade and is the primary surveillance tool. As a screening tool, the NAHLN H5 assay does not distinguish geographic lineage nor pathotype (LPAI vs HPAI). This clade specific assay uses real-time reverse transcriptase PCR targeted to clade H5 2.3.4.4. | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Influenza virus A H5 RNA | ||
| property | ThreshNum = Threshold Number | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | XXX | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | Probe.amp.tar | ||
Additional Names | |||
| short name | FLUAV H5 RNA Ct Spec Qn NAA+probe | ||
Basic Attributes | |||
| class | MICRO | ||
| type | 1 Laboratory | ||
| order vs. observation | Both | ||
| example UCUM units | {Ct_value} The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
| example unit | Ct | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
Member of these Groups | |||
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History/Usage | |||
| first released | |||
| last updated | 2.74 | ||
| last change type | NAM - change to Analyte/Component | ||
| change reason | Release 2.74: DefinitionDescription: Per updated information from NAHLH; add clarity and updated context. ; COMPONENT: Per updated information from NAHLH; add clarity and updated context.; Previous Releases: Changed property from 'ThresNum' to clarify the property name. | ||
Related Names | |||
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Copyright © 2023 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.
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