Flexible Label-Free Quantitative Assay for Antibodies to Influenza Virus Hemagglutinins

Hemolysis by liposomes containing influenza virus hemagglutinins.

Liposomes containing influenza virus hemagglutinin were reassembled from envelopes solubilized with Nonidet P-40 and were shown to induce hemolysis and cell fusion at low pH.

Standardization of ELISA for Detection of Avian Influenza Virus Antibodies

An Absolute Method for Assay of Virus Hemagglutinins

A rapid and precise method is described for determination of absolute numbers of hemagglutinating particles present in virus suspensions. The method involves spectrophotometric measurement of the number of red cells dimerized by the virus under conditions in which formation of larger aggregates is precluded. Results of this procedure are compared with those of titrations based on egg infectivit...

Adaptation of an indirect enzyme-linked immunosorbent assay by purified gp51SU for detection of antibodies to bovine leukemia virus

The objective of this study was to compare an indirect ELISA, based on a purified 60 kDa envelope glycoprotein (gp51SU), with a Pourquire indirect ELISA for the detection of antibodies to the bovine leukemia virus. For conducting this research, 340 serum samples were collected from two different breeds of cows (Sarabi and Holestin) in different herds. Commercial ELISA revealed positive results ...

Adsorption of Influenza Hemagglutinins and Virus by Red Blood Cells

A number of experiments were performed on the adsorption of influenza hemagglutinins on chicken red blood cells, from which the following conclusions were drawn:- 1. When chicken red blood cells and preparations of influenza viruses were mixed together, the influenza hemagglutinins present were rapidly adsorbed onto the cells. After varying lengths of time, dependent on the conditions of the ex...