Producción y evaluación in vitro de IgY contra Streptococcus mutans

dental caries is a worldwide infectious disease produce by streptococcus mutants. a strategy to combat this bacterium consists in preventing its adherence to tooth enamel through the use egg yolk immunoglobulin (igy). in this study we developed anti-s.mutans igy and determined its reactivity to evaluate its potential for preventing dental caries. the antibodies were produced by immunizing hens with lyophilized bacteria. pre and post immunization eggs were collected and their igy was purified by precipitation with peg 6000-chloroform. the highest igy level was obtained on the 42nd day post-immunization, as measured by an elisa test. reactivity was determined by western blot, showing the recognition of specific bands between 41 and 150 kda, which correspond to proteins involved in the adherence to dental surfaces. a maba test showed cross-reactivity with s. salivarum. igy activity was shown by in vitro agglutination and growth inhibition (mic) of s. mutans. these results show the potential of these antibodies for application in passive immunization trials as an alternative to prevent dental caries