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.

LOINCActiveObservation

LOINC Code 85550-2: PRRSV North American strain neut ab Neut test Ql (S)

Name: LOINC Code 85550-2: PRRSV North American strain neut ab Neut test Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:13.315Z

85550-2 is a LOINC code used to identify PRRSV North American strain neut ab Neut test Ql (S) 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 Porcine reproductive and respiratory syndrome virus North American strain Ab.Neut. It is commonly used with the system or sample type Ser.

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 Porcine reproductive and respiratory syndrome virus North American strain Ab.Neut. It is commonly used with the system or sample type Ser.

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: Observation
Method: Neut

What it does not mean

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

Key facts

PRRSV North American strain neutralizing antibody [Presence] in Serum by Neutralization test

Porcine reproductive and respiratory syndrome virus North American strain Ab.Neut

Neutralization methods such as fluorescent focus neutralization (FFN) is used to confirm positive Porcine Reproductive and Respiratory Syndrome (PRRS) results found with screening methods such as ELISA. It uses sample and control serums that are diluted and incubated on the PRRSV infected cells followed by florescent microscopic examination for characteristic patterns of fluorescent staining. Antibody can be detected in experimenally infected pigs 7 to 10 days post inoculation. Serum samples are screened at a 120 dilution to determine the presence or absence of the organism. (USDA).

Abortus blauw; ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Blue-eared pig disease; Conventional virus neutralization test; cVNT; ID; Infectious Disease; InfectiousDisease; Lelystad virus; Microbiology; Mystery swine disease; NAb; NEUTRALIZATION; Neutralization test; NT; Ordinal; Point in time; Porcine epidemic abortion & respiratory syndrome; Porcine reproductive and respiratory syndrome; Pork; PR; PRRS; PRRSV; PRRSV NA strain; Ql; Qual; Qualitative; Random; Screen; Serum; Serum virus neutralization; Seuchenhafter spatabort der schweine; SIRSV; SR; SVN; Swine; Swine infertility and respiratory syndrome; Syndrome dysgenesique et respiratoire porcin; Vet; Veterinary; Virus neutralization test; VNT

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

PRRSV North American strain neut ab Neut test Ql (S)PRRSV North American strain neutralizing antibody [Presence] in Serum by Neutralization testPRRSV NA strain NAb Ser Ql NtPorcine reproductive and respiratory syndrome virus North American strain Ab.NeutMICROPRRSV North american strain neutralizing antibody, BloodPrThr

Frequently asked questions

Code details

Code85550-2

SystemLOINC

Display namePRRSV North American strain neut ab Neut test Ql (S)

DescriptionPorcine reproductive and respiratory syndrome virus North American strain Ab.Neut

Short namePRRSV NA strain NAb Ser Ql Nt

ComponentPorcine reproductive and respiratory syndrome virus North American strain Ab.Neut

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodNeut

ClassMICRO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.61

Last changed2.64

Consumer names

PRRSV North american strain neutralizing antibody, Blood

Part names

Porcine reproductive and respiratory syndrome virus North American strain Ab.NeutPrThrPtSerOrdNeutPRRSV North American strain neutralizing antibodyPresence or ThresholdPoint in time (spot)SerumNeutralization test

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.