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Abstract
The potential use of biological agents such as viruses, bacteria or bacterial toxins as weapons of mass destruction has fuelled significant national and international research and development in novel prophylactic or therapeutic countermeasures. Such measures need to be fast-acting and broadly specific, a hallmark of target-specific polyclonal antibodies (pAbs). As reviewed here, pathogen-specific antibodies in the form of human or animal serum have long been recognised as effective therapies in a number of infectious diseases. This review focuses in particular on the potential biowarfare agents prioritised by the National Institute of Allergy and Infectious Diseases and the Centers for Disease Control and Prevention (CDC), referred to as the category A organisms. Furthermore, it is propose that the last decade of development in recombinant antibody technologies offers the possibility for developing highly specific human monoclonal or polyclonal pathogen-specific antibodies. In particular, pathogen-specific polyclonal human antibodies offer certain advantages over existing hyperimmune serum products, monoclonal antibodies, small molecule drugs and vaccines. Here, the rationale for designing pAb-based therapeutics against the CDC category A microbial agents causing anthrax, botulism, plague, smallpox, tularaemia and viral haemorrhagic fevers, as well as the overall design of such therapeutics, are discussed.