The recently modified fluorescence inhibition test for antibodies to toxoplasmosis is safe and relatively simple to perform. It appears to detect antibodies early in the course of acute systemic infection but is less sensitive than either the dye test or hemagglutination test in detecting chronic infection. Although hemagglutinating antibodies develop later than dye test antibodies in the cours...

In the present study, serum samples from 650 goats were collected from five counties between May and June 2012 and antibodies to Toxoplasma gondii were detected by indirect haemagglutination assay; 58 (9%) had antibodies to T. gondii with antibody titres of 1:64 to 1:1024. Seropositive samples were distributed in all five counties: seroprevalences in Kuandian county (15%, 21/139, 95% confidence...

A recently described hemagglutination test for hepatitis B antigen (HBsAg) using turkey erythrocytes coated with horse antibody to HBsAg purified by affinity column chromatography was evaluated on a comparative basis with 100 HBsAg-positive and -negative serum samples. The turkey erythrocyte hemagglutination test (TEHA) was found to be less sensitive than radioimmunoassay (RIA) but gave far bet...

We have shown that bacterial contamination of sera can have a marked influence on the results of the rubella hemagglutination-inhibition (HI) test. In addition to increasing the levels of nonspecific agglutinins, a number of common bacterial species tested had a significant effect on the HI titers. When sera free from rubella-specific antibodies were contaminated with Bacillus subtilis or Pseud...

A hemagglutination reaction has been described between sheep erythrocytes treated with a component of a polysaccharide fraction of mammalian tubercle bacilli and the sera of experimental animals or of tuberculous patients. Evidence has been presented for the specificity of this reaction. A modification of the test, involving an inhibition reaction, has been developed for the detection and quant...