LOINC
Version 2.72

44557-7Influenza virus A Ab [Presence] in Body fluidActive

Part Descriptions

LP14239-5   Influenza virus A
Influenza viruses, from the family Orthomyxoviridae, are enveloped negative-strand RNA viruses with segmented genomes containing seven to eight gene segments. Of the five genera in the family, only influenza A virus (IAV), influenza B and C are medically relevant to humans. Aquatic birds harboring avian IAV are the likely natural reservoir for all known IAV subtypes and are probably the original source of all human pandemic IAV strains. IAV maintained in wild birds have been associated with stable host switch events to novel hosts, including most often to domestic poultry but also to horses, swine, toothed whales and humans. The influenza virus life cycle begins with the binding of viral HA to host cell receptors. Endocytosis and HA-mediated fusion of the viral and cellular membranes occurs. Viral ribonucleoprotein complexes are released into the cytoplasm, travel to the nucleus, then are replicated and transcribed by the viral polymerase complex. The new viruses are formed and bud when the newly formed ribonucleicprotein complexes and structural proteins reach the plasma membrane. Further research is needed to better understand how IAVs switch hosts and the viral genetic changes that underlie human adaptation. IAV causes respiratory infections in humans ranging from asymptomatic to fatal. Pandemics are attributed to "novel" viruses which possess a viral hemagglutinin (HA) to which humans do not have immunity. [PMID:20542248] [PMID:25812763]
Influenza viruses A and B are single-stranded RNA enveloped viruses belonging to the Orthomyxoviridae family. The symptoms of infection of Influenza A and B include fever, cough, sore throat, rhinorrhea, nasal congestion, headache, myalgia and malaise. Some patients may experience gastrointestinal symptoms including watery diarrhea, vomiting and abdominal pain. The influenza viruses spread rapidly in enclosed spaces with a documented rate of infection of 70% following a common source of exposure. Infection occurs in the respiratory epithelium in both the upper and lower respiratory tract, and the virus can be found in many specimen types, including nasal aspirates, nasal or nasopharyngeal swabs, throat swabs, sputum and tracheal aspirates. When infection rates reach epidemic proportions, hospitalization of children and elderly patients rises as does the mortality rates of elderly patients.(Manual of Clinical Microbiology, 11th edition, James H. Jorgensen; Karen C. Carroll; Guido Funke; Michael A Pfaller; Marie Louise Landry; Sandra S. Richter; David W. Warnock) Source: Regenstrief LOINC

LP7238-1   Body fld
The LOINC "Body fld" System represents body fluids other than serum, plasma, blood, urine, and cerebrospinal fluid. When a LOINC term with the System "Body fld" is used, the specific specimen source or body fluid type should be reported elsewhere with the result. Where more specific terms for pleural, peritoneal, synovial fluid, etc. exist, we encourage you to use the more specific terms. In contrast to "Body fld", the System "Asp" in LOINC represents the fluid withdrawn during an aspiration procedure from an abnormal collection of fluid, such as from an abscess or cyst. "Asp" is used for abnormal fluid collections that are aspirated, while "Body fld" is used for named body fluids, such as synovial fluid or peritoneal fluid, that are not inherently pathologic. Source: Regenstrief LOINC

Fully-Specified Name

Component
Influenza virus A Ab
Property
PrThr
Time
Pt
System
Body fld
Scale
Ord
Method

Additional Names

Short Name
FLUAV Ab Fld Ql
Display Name
FLUAV Ab Ql (Body fld)
Consumer Name Alpha
Influenza A (Flu A) antibody, Body fluid

Basic Attributes

Class
MICRO
Type
Laboratory
First Released
Version 2.17
Last Updated
Version 2.56
Change Reason
The PrThr property is used for LOINC terms whose results are reported using an ordered categorical scale, regardless of whether or not an internal threshold was used to make that determination. This change was approved by the Laboratory LOINC Committee in June 2016.
Order vs. Observation
Both

Member of these Groups

LG32757-3 Influenza virus

Language Variants Get Info

zh-CNChinese (China)
流感病毒 A 型 抗体:存在情况或阈值:时间点:体液:序数型:
nl-NLDutch (Netherlands)
Influenzavirus A As:aanwezigheid:moment:lichaamsvocht:ordinaal:
et-EEEstonian (Estonia)
A-gripi viirus antikehad:PrThr:Pt:Fx:Ord:
fr-BEFrench (Belgium)
Virus de l'influenza A Ac:PrThr:Temps ponctuel:Liquide biologique:Ordinal:
fr-CAFrench (Canada)
Virus de l'influenza A , Ac:Présence-Seuil:Temps ponctuel:Liquide biologique:Ordinal:
fr-FRFrench (France)
Influenza virus A Ac:Présence/Seuil:Ponctuel:Liquide biologique:Qualitatif:
it-ITItalian (Italy)
Influenza A, virus Ab:PrThr:Pt:Liquido corporeo:Ord:
pt-BRPortuguese (Brazil)
Influenza vírus A Ac:ACnc:Pt:LiqOrg:Ord:
ru-RURussian (Russian Federation)
Грипп вирус А Ат:PrThr:ТчкВрм:Тело ждк:Пор:
es-MXSpanish (Mexico)
Virus de la influenza A Ab:Presencia o umbral:Punto temporal:Fluído corporal:Ordinal:
es-ESSpanish (Spain)
Virus Influenza A Anticuerpos:PrThr:Punto temporal:Fluido corporal:Ord:
tr-TRTurkish (Turkey)
İnfluenza virüsü A Ab:MevcEşik:Zmlı:Vücut sv:Srl:

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=44557-7