Because sugar doesn't dissolve in automotive fuel, it doesn't carmelize, and so it does not turn into the debilitating gunk this well-known entry in the revenge canon calls for. Instead, sugar poured into a car's gas tank stays intact. While sugar could still cause harm if it reached the engine (but in the same way sand would, by virtue of its being a granular contaminant, not because the sugar would turn into a syrup), even that potential harm is generally prevented by filtration.
The stool culture is a test that detects and identifies bacteria that cause infections of the lower digestive tract. The test distinguishes between the types of bacteria that cause disease (pathogenic) and the types that are normally found in the digestive tract (normal flora). The test helps to determine if pathogenic bacteria are the cause of gastrointestinal symptoms (gastroenteritis). The bacteria found in stool are representative of the bacteria that are present in the gastrointestinal tract. Certain bacteria and fungi called normal flora inhabit everyone's gastrointestinal tract.
A stool culture can find out what bacteria, viruses, parasites, or fungi may be causing an infection. For a stool culture, you collect a stool sample in a clean container. Then you bring it to a lab where the bacteria or other organisms are allowed to grow. To find out what type of infection you have, the person doing the test will do chemical tests and look at the sample under a microscope. Depending on what your stool is being tested for, you may only need to collect one stool sample. Or you may need several stool samples over a period of days.