A comparison of the amounts and the antigenicity of polymeric materials formed in aqueous solution by some β-lactam antibiotics

摘要

Concentrated aqueous solutions of some β-lactam antibiotics were stored for 14 days. Samples were then subjected to gel filtration and fractions in the high molecular weight regions of the eluate were collected and lyophilized. The yields of materials from solutions of various β-lactam antibiotics were compared and the antigenicity of the materials was assessed by their ability to react with antibodies of benzylpenicilloyl specificity raised in rabbits and tested in guinea-pigs by passive cutaneous anaphylaxis.