As isolation of the organism is difficult, serological tests are used for the routine diagnosis of brucellosis in most cases and the agglutination test
is used as the principal test.
False-positive reactions in the latex agglutination test
for Cryptococcus neoformans antigen.
Diagnosis of cysticercosis with charcoal agglutination test
The diagnosis is established by detection of a titer of 1 /160 and over in a standard agglutination test
or a four-fold increase in the titer of a patient for whom brucellosis is considered likely but who has a standard agglutination test
result of under 1 /160.
Secondly, pertaining to the serological test that has been used, although the microscopic agglutination test
(MAT) is the reference method for epidemiological serosurveys of leptospirosis, it has several drawbacks.
At the end of the third week, the report of Brucella agglutination test
was received showing 1: 1280 titers, Elisa Igm positive and IgG negative.
PCR as well as a latex agglutination test
(developed in-house at RMRC, Port Blair, unpublished) showed positive reactions on this sample also thereby lending support to the diagnosis.
We also tested our technique on a commercial latex agglutination test
kit for rheumatoid factor (Rhelax RF test, M/s Tulip).
Studies have demonstrated that the rapid latex agglutination test
and quantitative ELISA assay are sensitive and specific enough for detecting inflammation in chronic IBD patients.
The patient had a positive history of fresh cheese ingestion, so a Wright agglutination test
was also performed and the titer was found to be positive at 1:160.
Plasma from the twins' cord blood tested positive by a rose bengal plate test, but results were indeterminate or negative by standard tube agglutination test
(titer < 50).
A latex agglutination test
works in this manner: beads are coated with plasma antibodies unique to a particular pathogen.