The connection of Semmelweis here is quite clear, but what about the smashing of food vessels? Our current technology makes this practice perfectly understandable. Such uncovered vessels may have contained food remnants which would then serve as excellent culture media for certain disease causing micro-organisms which may actually have been ingested or deposited there by the deceased. They would then be present to grow nicely in new food added to the vessel. Many such organisms (sources of acute food poisoning, etc.) would be virtually impossible to get rid of in porous clay vessels unless such vessels were sterilized in pressurized steam."
Evidence for Faith: Deciding the God Question, contributor William J. Cairney, p. 139