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Mycoplasma Synoviae Nobilis Antigen Test Kit

This page contains information on Mycoplasma Synoviae Nobilis Antigen Test Kit for veterinary use.
The information provided typically includes the following:
  • Mycoplasma Synoviae Nobilis Antigen Test Kit Indications
  • Warnings and cautions for Mycoplasma Synoviae Nobilis Antigen Test Kit
  • Direction and dosage information for Mycoplasma Synoviae Nobilis Antigen Test Kit

Mycoplasma Synoviae Nobilis Antigen Test Kit

This treatment applies to the following species:
Manufacturer: Intervet/Merck Animal Health

S-serotype, Plate Stained Antigen For Plate Agglutination Test

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This antigen is a suspension of killed, stained WVU-1853 strain Mycoplasma synoviae (MS) antigen for serum plate testing of chicken and turkey serum. The reactivity has been standardized against a reference serum.

Mycoplasma Synoviae Nobilis Antigen Test Kit Indications For Use

The antigen is used for the detection of MS antibody in chickens and turkeys. It is possible that not all birds in an infected flock will show a positive reaction, thus it is strongly recommended to use the serum plate agglutination test for flock diagnosis and not for the individual identification of infected birds.

MS infection can be subtly present in a flock. It is therefore recommended only to consider a flock as negative when the test has been repeated several times and has given a negative result each time. Current technical information indicates that turkey flocks may become infected with MS and not react with the serum plate test antigen. Under these conditions consult your poultry pathologist.

Before officially designating a flock as being infected, consult your poultry pathologist. Plate testing is a screening method only. Do not destroy a flock based upon results of testing with this antigen.

Performance Of The Test

The serum plate MS test should be considered a basic screening test for antibodies. Under normal circumstances, the rate of nonspecific reactions is low. However, nonspecific reactions may occasionally be high for a variety of reasons.

The hemagglutination inhibition (HI) test, is too cumbersome for routine screening use. Positive HI reactions are generally accurate, however, and are useful in evaluating serum samples that react with the plate antigen. The test should be conducted with four HA units. Titers of 1:80 or greater for both chicken and turkey sera are considered positive, while a 1:40 titer would be suspicious and additional tests are required. Titers at 1:20 or less are considered negative.

The testing sequence for flock should be as follows:

1. Conduct SPA test using Intervet Nobilis Antigen.

2. Test positive SPA serum samples with HI antigen.

3. Utilize HI results, additional tests (ie. culture, etc.) and your local poultry pathologist before determining Mycoplasma status of a flock. Always refer to the NPIP manual as mentioned in this sheet.

The serum plate test for MS is conducted by contacting and mixing 0.05 ml of test serum with 0.05 ml of serum plate antigen on a glass plate at room temperature. The standard procedure is:


2. Allow antigen and test serums to warm up to room temperature before use. Do not allow serum to be frozen prior to plate testing.

3. Dispense test serums in 0.05 ml amounts with a pipette (rinsed between samples) to 3.75 cm (1 1/2”) squares on a ruled glass plate. Limit the number of samples (no more than 25) to be set up at one time according to the speed of the operator. Serum should not dry out before being mixed with antigen.

4. Shake antigen prior to use. Dispense 0.05 ml of antigen beside the test serum on each square. Hold antigen dispensing dropper vertically.

5. Mix the serum and antigen, using a multimixing device if large numbers are to be run at one time.

6. Rotate the plate for 5 seconds. At the end of the first minute, rotate the plate again for 5 seconds and read 55 seconds later.

7. A positive reaction is characterized by the formation of definite clumps, usually starting at the periphery of the mixture. Most samples that are positive will react within the two-minute test period. Whenever samples are run, the antigen should be tested against known positive and negative control serums.

For additional information on Mycoplasma test procedures, refer to the following references: Proc. 77th Annual Meeting, U.S. Animal Health Association, 1973; Isolation and Identification of Avian Pathogens, 2nd Edition; Methods for Examining Poultry Biologics and for Identifying and Quantifying Avian Pathogens, 1971; and the National Poultry Improvement Plan and Auxiliary Provisions Manual, USDA-APHIS, June 1985.

This product is not hazardous when used according to directions supplied. A material safety data sheet (MSDS) is available upon request. This and any other consumer information can be obtained by calling Intervet Customer Service at 1-800-441-8272 or 1-302-934-8051.


Ten ml of antigen is packaged in a glass bottle with a separate dropper top. This top is calibrated to deliver 0.05 ml of antigen per test. The antigen should be stored in a dark area at 2-7°C (35-45°F).

How Supplied


Ordering Number

10 ml - 200 Tests


Manufactured By Intervet International B.v., Boxmeer, Holland

Distributed By Intervet Inc., Millsboro, De 19966

U.s. Import Permit No. 286a

Made in U.S.A.


AL 133

Nac No.

556 MORRIS AVE., SUMMIT, NJ, 07901
Telephone:   862-245-4321
Order Desk:   800-648-2118
Fax:   862-245-4935
Customer Service:   800-521-5767
Every effort has been made to ensure the accuracy of the Mycoplasma Synoviae Nobilis Antigen Test Kit information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2018 North American Compendiums. Updated: 2018-04-26