Effect of salt on saliva antibacterial property on Staphylococcus mutants and Staphylococcus aureus bacteria

Saliva is one of the first defense dams against microorganisms which enter the body through mouth and cause diseases, moreover, it decreases affliction to bacterial diseases by decreasing the microbial population of bacteria. This research aims to assess the effect of different salt concentrations and over-consumption of salt on antibacterial property of saliva on bacteria such as Staphylococcus aureus, which cause tooth decays, and Staphylococcus mutase, which cause food poisoning.In this research, by sampling healthy people’s saliva and mixing it with different concentrations of sea salt and iodine-containing table salt using a hole and cultivation meadow, Staphylococcus aureus and Staphylococcus mutase bacteria were separately studied. The halo created in the pure saliva hole in both bacteria was decreased from 1cm to 1mm in the holes containing saliva mixed with salt.the effect of salt in different concentrations using micro-dilution was also investigated. Consuming table salt with 4%, 10%, and 30%, and its mixture with the saliva and persistence of saltiness in the mouth can decrease the antibacterial effect of saliva on Staphylococcus aureus and Staphylococcus mutase, thus, increasing affliction to decay in most teeth, and food poisoning, and consumption of too much salt can decease the performance of the first defense dam in the body against microorganisms.

Keywords:

Salt , Saliva , Staphylococcus mutants , Staphylococcus aureus