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 22817-1: Avian infectious laryngotracheitis virus Ag Immune diff Ql (Trachea)

Name: LOINC Code 22817-1: Avian infectious laryngotracheitis virus Ag Immune diff Ql (Trachea)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:30.726Z

22817-1 is a LOINC code used to identify Avian infectious laryngotracheitis virus Ag Immune diff Ql (Trachea) 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 Trac.

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 Trac.

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
Method: Immune diffusion

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 Trachea by Immune diffusion (ID)
Avian infectious laryngotracheitis virus Ag
Alpha-herpesvirus; Antigen; Antigens; Avian infectious laryngotracheitis; Bird; Fowl; ID; ILT; Imm; Immunodiff; Immunodiffusion; Imun; Imune; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Trachea; 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 Immune diff Ql (Trachea)Avian infectious laryngotracheitis virus Ag [Presence] in Trachea by Immune diffusion (ID)ILT Ag Trachea Ql IDAvian infectious laryngotracheitis virus AgMICROAvian Infectious Laryngotracheitis virus antigen, TracheaPrThr

Frequently asked questions

Code details

Code22817-1

SystemLOINC

Display nameAvian infectious laryngotracheitis virus Ag Immune diff Ql (Trachea)

DescriptionAvian infectious laryngotracheitis virus Ag

Short nameILT Ag Trachea Ql ID

ComponentAvian infectious laryngotracheitis virus Ag

PropertyPrThr

TimingPt

System (specimen)Trac

ScaleOrd

MethodImmune diffusion

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.56

Consumer names

Avian Infectious Laryngotracheitis virus antigen, Trachea

Part names

Avian infectious laryngotracheitis virus AgPrThrPtTracOrdImmune diffusionPresence or ThresholdPoint in time (spot)TracheaImmune diffusion (ID)

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.