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These data suggest that specific polyclonal antibodies against ricin A- and B-chain may reproducibly protect mice against ricin poisoning, even when the antibodies are administered up to 1.5 h after poisoning.

Intra-articular injection of PAAG results in a stable, long-lasting sub-synovial layer of gel traversed with thin strands of connective tissue. Further studies to explore potential effects on synovial inflammation and pain are warranted.

Polyclonal antibodies are relatively easy to produce and may supplement monoclonal antibodies for some applications or even have some advantages. The choice of species for production of (peptide) antisera is based on practical considerations, including availability of immunogen (vaccine) and animals. Two major factors govern the production of antisera: the nature of adaptive immune responses, which take place over days/weeks and ethical guidelines for animal welfare. Here, simple procedures for immunization of mice, rabbits, sheep, goats, pigs, horses, and chickens are presented.

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