The effect of dietary lysozyme supplements on caries incidence in rats

Inhibition of streptococcal adherence by human oral secretions and its possible relationship to dental caries

Oral secretions were collected from 100 human volunteers, concentrated, and assayed for their ability to inhibit glucan-dependent adherence of S mutans strains to glass. Some samples were found to contain adherence inhibition activity. The inhibitor was heat labile and nondialyzable but dependent on the presence of a dialyzable molecule. Comparison of activities with the caries experience (DMFT) showed that individuals with the highest activity had significantly lower mean caries scores, but that cariesfree donors did not differ significantly from caries-positive donors in mean adherence inhibition activity. These results suggest that some persons may have substances in their oral secretions that play a role in resistance to dental caries.

Lysozyme insensitivity of bacteria indigenous to the oral cavity of man

SYNOPSIS IN INTERLINGUA

INSENSIBILITATE A LYSOZYMA DEL PARTE DE BACTERIOS INDIGENE AL CAVITATE ORAL DEL HOMINE.-Esseva constatate que inter 112 culturas pur, representante 13 gruppos de bacterios oral, nulle esseva lysate per lysozyma a concentrationes de 5,50, o 500 μg per ml, secundo essayos turbidimetric. In plus, esseva trovate que le plus numerose bacterios cultivabile ab specimens de debris gingival, de placa dental, e de saliva cresceva in le presentia de 0,5, 5, o 50 μg per ml de lysozyma. Quando specimens de debris gingival esseva incubate con 50 μg per ml de lysozyma, nulle liberation de proteina solubile esseva detegite. Iste datos pare indicar que lysozyma per se exerce pauc effecto super bacterios indigene al cavitate oral del homine.