agglutination titer


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titer

 [ti´ter]
the quantity of a substance required to react with or to correspond to a given amount of another substance.
agglutination titer the highest dilution of a serum which causes clumping of microorganisms or other particulate antigens.

agglutination titer

The highest dilution of a serum that will cause agglutination (clumping) of the antigen being tested.
See also: titer
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References in periodicals archive ?
* Fourfold or greater rise in Brucella agglutination titer between acute-and convalescent-phase serum specimens obtained [greater than or equal to] 2 weeks apart and studied at the same laboratory, or
An agglutination titer performed on a blood specimen coll ected during ED examination was negative ([less than]1:80), but a sample obtained 11 days later had a titer of 1:320.
Agglutination titer was 640; ELISA immunoglobulin M (IgM) antibodies and PCR results were positive.
Microscopic agglutination titer of patients' sera collected while hospitalized and during the convalescent phase Patient serum Leptospira strain used Convalescent- Patient as antigen * Hospitalized phase 1 Serovar Grippotyphosa Moskva V <50 100 Animal isolate AM3 <50 800 Animal isolate AM1 <50 800 2 Serovar Grippotyphosa Moskva V <50 200 Animal isolate AM3 <50 200 * Samples were not reactive to a panel of representative serovars, Australis, Autumnalis, Carlos, Bataviae, Cynopteri, Hebdomadis, Copenhageni, Icterohemorrhagiae, Javanica, Pomona, Pyrogenes, Hardjo, Sejroe, Wolffi, and Tarassovi; serovars Canalzonae, Huanuco, Muelleri, and Valbuzzi belong to serogroup Grippotyphosa.
tularensis if the agglutination titer was [greater than or equal to] 128.
A co-worker of laboratory worker 1 had an initial agglutination titer of 1:40 (indeterminate) and 1 month later had a repeat titer of <1:20; she denied having symptoms.
interrogans (australis, autumnalis, pomona, sejroe, tarassovi, icterohaemorrhagica, hebdomadis, and patoc) were tested, and a agglutination titer of more than 1:100 was considered positive.
Agglutination titers were determined from the final dilution of serum showing 50% agglutination.