Version 2.77

Term Description

Immunofluorescence testing of lower respiratory specimens for Legionella pneumophila antigen has over 99% specificity, but only 25-70% of patients with culture-positive disease test positive for the antigen. Therefore, IF cannot be used to rule out Legionella infection, but a positive result is nearly always diagnostic. [http://www.who.int/water_sanitation_health/emerging/legionella.pdf]
Source: Regenstrief LOINC

Part Description

LP16720-2   Legionella pneumophila
Legionella pneumophila, a gram-negative bacillus, most commonly causes acute pneumonia (legionellosis). Transmission to humans is usually through aerosols of infected water sources such as fountains, misting systems, and drinking water. Severity of infections due to L. pneumophila range from mild (walking pneumonia) to fatal (multilobar pneumonia). Antimicrobial therapy usually includes erythromycin, with the addition of rifampin in severe cases. Initial response to therapy is usually rapid, but full recovery can take weeks to months. PMID: 21413250 Source: Regenstrief LOINC,

Fully-Specified Name

Component
Legionella pneumophila Ag
Property
PrThr
Time
Pt
System
Respiratory system specimen.lower
Scale
Ord
Method
IF

Additional Names

Short Name
L pneumo Ag Lower resp Ql IF
Display Name
L. pneumophila Ag IF Ql (Lower resp)
Consumer Name Alpha Get Info
Legionella pneumophila antigen, Lower respiratory

Example Answer List: LL744-4

Source: Regenstrief Institute
Answer Code Score Answer ID
Detected LA11882-0
Not detected LA11883-8

Basic Attributes

Class
MICRO
Type
Laboratory
First Released
Version 2.64
Last Updated
Version 2.77
Change Reason
Release 2.77: SYSTEM: Updated to standardize the representation of "Respiratory system specimen" in the System subhierarchy across LOINC;
Order vs. Observation
Both

Member of these Groups Get Info

LOINC Group Group Name
LG41638-4 Legionella
LG34024-6 Legionella pneumophila Ag|PrThr|Sys:ANYResp

Language Variants Get Info

Tag Language Translation
es-MX Spanish (Mexico) Legionella pneumophila Ag:Presencia o umbral:Punto temporal:Muestra de vías respiratorias inferiores:Ordinal:Inmunofluorescencia (IF)
fr-FR French (France) Legionella pneumophila Ag:Présence/Seuil:Ponctuel:Voies respiratoires inférieures:Qualitatif:Immunofluorescence
nl-NL Dutch (Netherlands) Legionella pneumophila Ag:aanwezigheid:moment:onderste luchtwegen:ordinaal:immunofluorescentie
Synonyms: antigeen IF onderste ademhalingsstelsel; systema respiratorium inferior systema respiratorium; ademhalingsstelsel

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=89594-6