Abstract The formation of antibodies to the A-2 plaque virus previously propagated in tissue culture is described. The application describes an immune response against those antibodies and against the A-2 plaque virus antigen which is associated with human viral hepatitis both of type A and B origin. The reaction of antibody for A-2 plaque virus with the antigen from stool specimens of volunteers infected with type A hepatitis and from the sera of patients diagnosed as having type B hepatitis is described. Convalescent sera from both type A and type B hepatitis patients in reaction with the virus, demonstrate the presence of antigenic components in the plaque virus which react with human antibody formed in response to infection with either type A or type B hepatitis. Moreover, the A-2 plaque antibodies react with hepatitis B core antigen, while antibodies to HB c Ag react with A-2 plaque antigen. Additionally, methods for inducing antibody formation in humans from the A-2 plaque virus antigen are described, as are methods for detecting HB c Ag, HB c Ab, HAAg and HAAb.
The method for detecting hepatitis B core antigen in a material suspected of containing said antigen which comprises contacting said material in a system with antibodies to A-2 plaque virus thereby to cause said antigen if present to cross-react with said antibodies, and then determining whether said cross-reaction has occurred.
Claim 2
Independent Claim
50 words
The method for detecting hepatitis B core antigen in a material suspected of containing said antigen which comprises contacting said material in a system with antibodies to A-2 plaque virus thereby to cause said antigen if present to cross-react with said antibodies, and then determining whether said cross-reaction has occurred.
Claim 3
Dependent Claim
21 words
The method according to claim 1 wherein the antibodies are antibodies to A-2 plaque virus corresponding to ATCC No. VR 812.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein sad system is an immuno-counterelectrophoresis, radioimmunoassay or immunoelectron microscopic system.
Claim 5
Independent Claim
49 words
The method for detecting hepatitis B core antibody in a material suspected of containing said antibody which comprises contacting said material in a system with A-2 plaque virus antigen thereby to cause said antibody if present to cross-react with said antigen, and then determining whether said reaction has occurred.
Claim 6
Independent Claim
49 words
The method for detecting hepatitis B core antibody in a material suspected of containing said antibody which comprises contacting said material in a system with A-2 plaque virus antigen thereby to cause said antibody if present to cross-react with said antigen, and then determining whether said reaction has occurred.
Claim 7
Dependent Claim
18 words
The method according to claim 4 wherein the A-2 plaque virus antigen corresponds to ATCC No. VR 812.
Claim 8
Dependent Claim
16 words
The method of claim 5 wherein said system is an immuno-counterelectrophoretic, radioimmunoassay or immunoelectron microscopic system.