antibody titer


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antibody titer

The amount of a specific antibody present in the serum, usually as a result of an acquired infection; titers for IgM usually rise abruptly at the time of infection–acute phase and fall slowly; during the 'convalescent' phase, IgG ↑ and is elevated for life. See Seropositivity.

antibody titer

The concentration of a specific antibody in plasma. Antibody titers are used to establish the diagnosis of some infectious diseases: a rising titer indicates a recent exposure to a specific infectious antigen.
See also: titer
References in periodicals archive ?
In the control group, average maternal antibody levels were as high as 8 of HI antibody titer at hatch and thereafter decreased quickly.
1964) and an increase in the antibody titer and cell-mediated response (DTH) at 100 mg/kg body wt.
Reverse cumulative distribution curves of neutralizing antibody titers against enterovirus D68 isolates, by isolate and age group, Kansas City, Missouri, USA, 2012-2013.
Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is an autoimmune neurologic syndrome characterized by multistage progression of symptoms including psychosis, memory deficits, seizures, and decreased level of consciousness along with autonomic instability.[1] Most patients had substantial recovery from the treatment of tumor resection and immunotherapy, which were associated with a decline of antibody titers. However, other patients remain severely disabled or die.[1],[2] In a large cohort study, multivariable analysis revealed that the factors associated with good outcome included no need for Intensive Care Unit (ICU) and early treatment.[3]
Mean values of antibody titers of each group were compared using one way analysis of variance (ANOVA) followed by Duncan Multiple Range Test (Steel et al., 1997).
Among 50 sheep examined 3 gave anti body titer of 1: 16 which indicated residual or non specific immunity; one showed antibody titer of 1:128 which was due to acquired or evolving immunity whereas no sheep was positive at antibody titer of 1:256 which suggest no recent contact with parasite.
The highest HI antibody titer was recorded in group F (274.4) and the lowest GMT, HI antibody titer was recorded in group G (19.7).group F (315.2) and the lowest GMT, HI antibody titer was recorded in group G (4.3).On day 42 the GMT, HI antibody titers of groups A, B, C, D, E, F and G were 445.7, 388.0, 512.0, 388.0, 477.7, 588.1 and 0.0, respectively.
The investigators measured serum antibody production via hemagglutination inhibition assay before influenza vaccination and 2-4 weeks and 6 months after vaccination, and compared antibody titers to individual vaccine viral strains after flu season to measure the persistence of antibody response.
Unfortunately, it was not possible to check her VZV antibody titers before her recurrent varicella episode.
In general, IgM or IgG serum antibody titers that are positive for West Nile virus on ELISA should be confirmed by plaque reduction neutralization assay in cell culture to eliminate false positives from cross-reactivity with other flaviviruses--particularly St.
Geometric mean antibody titer and percentage of antibody 21:40 in nursing-home residents who received either recalled Fluogen[R](*) or influenza vaccine from a different manufacturer, by vaccine component-New York, 1996 Received Received vaccine from recalled a different Category/ Fluogen[R] manufacturer vaccine component (n=86) (n=86) p values([dagger]) Geometric mean titers A/Nanchang/933/95(H3N2) 33.2 54.8 0.01 A/Texas/36/91(H1N1) 73.8 54.8 0.12 B/Harbin/07/94 66.5 77.5 0.33 % Residents with titers [greater than or equal to] 1:40 A/Nanchang/933/95(H3N2) 52.3% 67.4% 0.04 A/Texas/36/91(H1N1) 80.2% 75.6% 0.54 B/Harbin/07/94 77.9% 81.4% 0.57 (*) Use of trade names and commercial sources is for identification only and does not imply endorsement by the U.S.
An integer value for the hepatitis B surface antibody titer could not be determined for one subject; therefore, this subject's data were excluded from all study analyses.

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