How long is the life of lysozyme in saliva? What bacteria can it kill? Can you kill dental caries bacteria?

The function of saliva is to moisten the mouth, reconcile and moisten food, make food dissolve and cause taste sensation, which is convenient for swallowing; Amylase can hydrolyze starch and glycogen and play a role in digestion; This amylase can still continue to act in the stomach 10 ~ 30 minutes until the pH drops to 4.5. Before the enzyme is inactivated, about 60 ~ 70% of starch in food is converted into maltose, dextrin, maltotriose and so on. Saliva can prevent dry mouth, remove food residue and clean mouth; Lysosome thiocyanate and protein antibody can kill bacteria. Saliva can neutralize gastric acid and protect the stomach wall. Fluoride contained in saliva can reduce the incidence of dental caries and protect teeth. The ABO blood group substance contained in saliva can determine the blood group. Saliva containing nerve growth factor and epidermal growth factor can help wound contraction and wound healing. Saliva is also helpful for medical diagnosis. In some animals (such as dogs) lacking sweat glands, saliva secretion can also regulate the balance between body temperature and water.