Preparation of antibacterial chlorhexidine/vermiculite and release study

After 30 min of exposition the MIC of organovermiculite samples before and after stability test were the same for Staphylococcus aureus and Escherichia coli with value 3.33 (%; w/v) and the MIC decreased to 0.014 (%; w/v) with longer time of exposition (120 h). A small difference was observed at Enterococcus faecalis where MIC was 10 (%; w/v) after 30 min of exposition for the sample after stability test in neutral pH. However, after 24 h of treatment the MIC value decreased to 0.014 (%; w/v). And finally, bacterial strain Pseudomonas aeruginosa showed a great resistance against antibacterial organovermiculite samples and MIC did not decreased under 10 (%; w/v) even after 5 days of exposition.