Therapeutic IgM concentrates.

摘要

Protective antibody compositions comprising at least 33% by weight of antibodies of the IgM type and substantially free of homologous isoagglutinins are highly active against gram negative pathogens in mammals. Such compositions are preferably polyclonal and prepared from human plasma, or may be a formulation of different monoclonal antibodies. A very preferred IgM content is at least 50% by weight and the isoagglutinin titer is less than about 1:4. In one embodiment, the compositions are prepared in a lyophilized form such that, upon aqueous reconstitution, they result in a solution having a pH ranging from about 4.0 to 8.0, preferably 4.0 to 7.0 and can be administered intravenously.