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 20853-8: Equine herpesvirus 1 Ag IF Ql (Tracheal swab)

Name: LOINC Code 20853-8: Equine herpesvirus 1 Ag IF Ql (Tracheal swab)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:29.456Z

20853-8 is a LOINC code used to identify Equine herpesvirus 1 Ag IF Ql (Tracheal swab) 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 Equine herpesvirus 1 Ag. It is commonly used with the system or sample type Tracheal swab.

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 Equine herpesvirus 1 Ag. It is commonly used with the system or sample type Tracheal swab.

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: IF

What it does not mean

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

Key facts

Equine herpesvirus 1 Ag [Presence] in Tracheal swab by Immunofluorescence
Equine herpesvirus 1 Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; DFA; EHV; EHV1; EHV-1; Equid; Equid alphaherpesvirus 1; Equin; Equine abortion herpesvirus; Equine rhinopneumonitis; FA; Fluorescent antibody; Fluoresent; Herpes virus; i; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Time Resolved Fluorescence; Tracheal Swb; TRF; 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

Equine herpesvirus 1 Ag IF Ql (Tracheal swab)Equine herpesvirus 1 Ag [Presence] in Tracheal swab by ImmunofluorescenceEHV1 Ag Tracheal Swb Ql IFEquine herpesvirus 1 AgMICROEquine herpesvirus 1 antigen, Tracheal swabPrThr

Frequently asked questions

Code details

Code20853-8

SystemLOINC

Display nameEquine herpesvirus 1 Ag IF Ql (Tracheal swab)

DescriptionEquine herpesvirus 1 Ag

Short nameEHV1 Ag Tracheal Swb Ql IF

ComponentEquine herpesvirus 1 Ag

PropertyPrThr

TimingPt

System (specimen)Tracheal swab

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.67

Consumer names

Equine herpesvirus 1 antigen, Tracheal swab

Part names

Equine herpesvirus 1 AgPrThrPtTracheal swabOrdIFPresence or ThresholdPoint in time (spot)Immunofluorescence (IF)

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.