Merck + Co., Inc.

Lynn T Callahan

Richard L Tolman

Stephen Marburg

William J McAleer

William J Miller

ADP-Ribosylating toxins are rendered enzymatically inactive by reactions with photolabile affinity reagents. The toxoids retain the antigenic and immunogenic properties of the original toxins. These bacterial toxoids can be used as immunogens to protect against the specific disease that the precursor toxins cause or, in the case of P. aeruginosa, the toxoid can be used in combination with E. coli J-5 vaccine to protect against gram-negative bacteremia in general.

Bacterial toxoids and gram-negative immune globulin therefrom

ADP-ribosylating toxins are rendered exzymatically inactive by reactions with photolabile affinity reagents. The toxoids retain the antigenic and immunogenic properties of the original toxins. These bacterial toxoids can be used as immunogens to protect against the specific disease that the precursor toxins cause or, in the case of P. aeruginosa, the toxiod can be used in combination with E. coli J-5 vaccine to protect against gram-negative bacteremia in general.

HB.sub.c Ab is detected in biological fluid by contacting HB.sub.c Ag derived from Dane particles and adhered to a surface with the biological fluid and an antibody-enzyme conjugate. The HB.sub.c Ag is adhered to the surface in the presence of a nonionic surfactant.

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North Wales, PA, United States of America

Lynn T Callahan