89594-6
LaboratoryLegionella pneumophila Ag [Presence] in Lower respiratory specimen by Immunofluorescence
Definition
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]
LOINC 6-Axis Classification
Component
Legionella pneumophila Ag
Property
PrThr
Time Aspect
Pt
System
Respiratory system specimen.lower
Scale Type
Ord
Method Type
IF
Details
Class
MICRO
Order/Observation
Both
Short Name
L pneumo Ag Lower resp Ql IF
Display Name
L. pneumophila Ag IF Ql (Lower resp)
Related Names
Frequently Asked Questions
What is LOINC code 89594-6?
LOINC code 89594-6 identifies "Legionella pneumophila Ag [Presence] in Lower respiratory specimen by Immunofluorescence". 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]
What does 89594-6 measure?
This code measures Legionella pneumophila Ag in Respiratory system specimen.lower. It belongs to the MICRO class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.