Fibrinogen can transform fibrin through an agglutination reaction, finally forming fibrin polymer with grid structure. The density and viscosity of the reaction system changes drastically during the course of agglutination. In this research, we apply an independently-developed piezoelectric agglutination sensor to detect the fibrinogen agglutination reaction in patients with coronary heart dise...

A correlation has been observed between concanavalin A agglutination of various cell types and the presence of surface membrane galactosyltransferase (1-O-alpha-D-Galactosyl-myo-inositol:raffinose galactosyltransferase, EC 2.4.1.67) activity. Moreover, a reduction to less than 50% of cell surface galactosyltransferase activity occurred after treatment with concanavalin A; other cell surface gly...

Parasite Biology, Epidemiology and Systematics Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, United States Department of Agriculture, Building 1001, Beltsville, Maryland 20705-2350 Antibodies to Neospora caninum and Sarcocystis neurona were determined in serum samples of 502 domestic cats from Brazil using direct agglutination tests with the respective antig...

I t has been recognized since 1954 (1) that the red cells of mice of some strains, notably A, can be specifically agglutinated more readily by anti-H-2 sera than those of others. This difference has been shown to apply to several 1t-2 antigens (2) and has been ascribed to a different cell concentration of antigenic determinants (3). Experience shows, however, that nonspecific agglutinability is...

The two serotyping schemes for the detection of heat-stable antigens of Campylobacter jejuni and Campylobacter coli use the same strains for antiserum production but differ in the detection systems used for identifying agglutination. The Penner method uses passive hemagglutination (PHA) while the Laboratory of Enteric Pathogens method uses the same antisera but in a whole-bacterial-cell direct ...

By JOSEPH H. LAPIN, ANDREW HORONIcK AND ROBERT H. LAPIN T HE COMPLETE SEPARATION of viable leumkocytes from the erythrocytes of peripheral human blood, in a manner satisfactory for immunologic procedures, has never been achieved. As a consequence, all of the work on agglutination phenomena and the demonstration of ABO group antigens in leukocytesl*3 becomes subject to criticism. Riis4 described...

A total of 163 stool specimens were tested for detection of Clostridium difficile and its toxin by cytotoxicity assay with tissue culture, latex agglutination test, and isolation of the organism. From 33 specimens which were positive for toxin by cytotoxicity, 30 were positive by the latex agglutination test; the organism was isolated from 21. The total number of samples which were positive wit...