Along with eggs, I've used previously unopened sour cream WAY (, way) past the date and do the same as you once it's opened. Between the pasteurization of the original milk and then innoculation with good microbes, the lower moisture content and the acidity, it's not a very hospitable environment for pathogens.
Cauterization definition, to burn with a hot iron, electric current, fire, or a caustic, especially for curative purposes; treat with a cautery. See more. Dictionary.com
Sterilization is also a surgical technique leaving a male or female unable to procreate. It is a method of birth control. SANITATION: Sanitation is the hygienic disposal or recycling of waste, as well as the policy and practice of protecting health through hygienic measures.