Version 2.72

85802-7Influenza virus A H1 Ag [Titer] in Isolate by Hemagglutination inhibitionActive

Part Descriptions

LP35168-1   Influenza virus A H1
The influenza virus A (FLUVA) genome is composed of eight gene segments (PB2, PB1, PA, HA, NP, NA, M, NS1) that code for 11 proteins. Two of the genes, hemagglutinin (HA) and neuraminidase (NA), determine the structure of the two primary surface proteins of influenza viruses. The HA and NA gene sequences are used to determine the Influenza virus subtype. Currently there are 16 subtypes of HA and 9 subtypes of NA known, but only H 1, 2 and 3, and N 1 and 2 are commonly found in humans.[PMID:17458769] The M gene segment, which encodes two matrix proteins (M1 and M2), may also be used as a target in PCR-based assays for detection of FLUVA in various specimens. Source: Regenstrief LOINC

LP6304-2   HAI
The hemagglutination-inhibition assay (HAI) can be used to identify subtypes of hemagglutinin producing viruses, such as Influenza. HAI can also be used to identify the subtype-specificity of antibodies against the virus. Normally, Influenza's hemagglutinin glycoprotein binds to receptors on the surface of red blood cells, causing them to agglutinate. If antibodies specific to the virus are present in the patient sample, they will bind to the virus, which prevents the virus from binding to the red blood cells and therefore prevents agglutination. To determine which subtype of virus is present, a viral isolate is tested against a series of antibodies with known subtype specificities. Whichever antibody inhibits red cell agglutination identifies the viral subtype. Similarly, antibody specificity is identified by testing the patient sample against known virus subtypes. [PMID:24899416] Source: Regenstrief LOINC

Fully-Specified Name

Influenza virus A H1 Ag

Additional Names

Short Name
FLUAV H1 Ag Titr Islt HAI
Display Name
FLUAV H1 Ag HAI (Isol) [Titer]
Consumer Name Alpha
Influenza A H1 antigen

Basic Attributes

First Released
Version 2.61
Last Updated
Version 2.61
Order vs. Observation

Member of these Groups

LG32757-3 Influenza virus

Language Variants Get Info

zh-CNChinese (China)
流感病毒 A 型血凝素 H1 型 抗原:滴定度:时间点:分离株:定量型:红细胞凝集抑制试验法
nl-NLDutch (Netherlands)
Influenzavirus A H1 Ag:titer:moment:isolaat:kwantitatief:hemagglutinatieremming
et-EEEstonian (Estonia)
A-gripi viirus H1 antigeen:Titr:Pt:Is:Qn:HAI
fr-BEFrench (Belgium)
Virus influenza type A. H1 Ag:Titre:Temps ponctuel:Isolat:Quantitatif:Inhibition de l'hémagglutination
fr-CAFrench (Canada)
H1 influenza type A , Ag:Titre:Temps ponctuel:Isolat:Quantitatif:Inhibition de l'hémagglutination
fr-FRFrench (France)
Influenza virus A H1 Ag:Titre:Ponctuel:Isolat:Numérique:Hémagglutination indirecte
it-ITItalian (Italy)
Influenza A H1, virus , Ag:Titr:Pt:Isolato:Qn:HAI
es-MXSpanish (Mexico)
Virus de la influenza A H1 Ag:Título:Punto temporal:Aislado:Cuantitativo:Inhibición de la hemaglutinación
es-ESSpanish (Spain)
Hemaglutinina H1 del virus Influenza A Antígeno:Titulo / Factor de dilución:Punto temporal:Aislado:Qn:Inhibición de la Hemaglutinación
tr-TRTurkish (Turkey)
İnfluenza virüsü A H1 Ag:Titr:Zmlı:İzolat:Kant:HAI

Example Units

Unit Source
{titer} Example UCUM Units

LOINC FHIR® API Example - CodeSystem Request Get Info