What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 31720-6: Avian infectious laryngotracheitis virus Ag Ql (Lung tissue)

Name: LOINC Code 31720-6: Avian infectious laryngotracheitis virus Ag Ql (Lung tissue)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:17.665Z

31720-6 is a LOINC code used to identify Avian infectious laryngotracheitis virus Ag Ql (Lung tissue) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Avian infectious laryngotracheitis virus Ag. It is commonly used with the system or sample type Lung tiss.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Avian infectious laryngotracheitis virus Ag. It is commonly used with the system or sample type Lung tiss.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Both

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Avian infectious laryngotracheitis virus Ag [Presence] in Lung tissue
Avian infectious laryngotracheitis virus Ag
Alpha-herpesvirus; Antigen; Antigens; Avian infectious laryngotracheitis; Bird; Fowl; ID; ILT; Infectious Disease; InfectiousDisease; Lung; Microbiology; Ordinal; Point in time; PR; Pulmonary; Pulmonology; Ql; Qual; Qualitative; Random; Respiratory; Screen; Tissue; Tissue lung; Tissue, unspecified; Tlng; Vet; Veterinary

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Avian infectious laryngotracheitis virus Ag Ql (Lung tissue)Avian infectious laryngotracheitis virus Ag [Presence] in Lung tissueILT Ag Lung tiss QlAvian infectious laryngotracheitis virus AgMICROAvian Infectious Laryngotracheitis virus antigen, Lung tissuePrThr

Frequently asked questions

Code details

Code31720-6

SystemLOINC

Display nameAvian infectious laryngotracheitis virus Ag Ql (Lung tissue)

DescriptionAvian infectious laryngotracheitis virus Ag

Short nameILT Ag Lung tiss Ql

ComponentAvian infectious laryngotracheitis virus Ag

PropertyPrThr

TimingPt

System (specimen)Lung tiss

ScaleOrd

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.07

Last changed2.56

Consumer names

Avian Infectious Laryngotracheitis virus antigen, Lung tissue

Part names

Avian infectious laryngotracheitis virus AgPrThrPtLung tissOrdPresence or ThresholdPoint in time (spot)Lung tissue

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.