81321-2
LOINC Code
| LOINC code | 81321-2 | ||||
|---|---|---|---|---|---|
| name | |||||
| description | This term represents the identification of the Influenza A H5 subtype based on the H5b probe and primer set provided by the Centers for Disease Control and Prevention. "H5b" does not refer to a more specific type of the H5 virus, rather it is the name of one of the two primer and probe sets (the other is H5a) that are used to detect the Influenza A H5 subtype. For presumptive positive identification of the H5 subtype, results for both the H5a and H5b assays should be positive. If one is positive and one is negative, the result is inconclusive for the H5 subtype. Possible specimens include: upper respiratory tract clinical specimens (including nasopharyngeal swabs, nasal swabs, throat swabs, nasal aspirates, nasal washes, and dual nasopharyngeal/throat swabs), and lower respiratory tract specimens (including bronchoalveolar lavage, bronchial wash, tracheal aspirate, sputum, and lung tissue. | ||||
| status | ACTIVE | ||||
Fully-Specified Name | |||||
| component | Influenza virus A H5 Asian 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 | Respiratory System Specimen | ||||
| 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.primer-probe set H5b | ||||
Additional Names | |||||
| short name | 3 Self-Sustaining Sequence Replication; 3SR SR; Amplif; Amplification; Amplified; Avian influenza; Bird flu; Breathing; DNA NUCLEIC ACID PROBE; DNA probe; FLUA; FLUAV; FLUAV H5; FLUAV H5 Asian; FLUV; Fowl plague; ID; Infectious Disease; InfectiousDisease; | ||||
Basic Attributes | |||||
| class | MICRO | ||||
| type | 1 Laboratory | ||||
| order vs. observation | FLUAV H5 Asian | ||||
| example UCUM units | Ct 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) | ||||
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History/Usage | |||||
| first released | |||||
| last updated | 2.75 | ||||
| last change type | MAJ - change to name field other than Component; | ||||
| change reason | {Ct_value} | ||||
Related Names | |||||
Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, 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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