Trade agreement. Trade agreement, any contractual arrangement between states concerning their trade relationships. Trade agreements may be bilateral or multilateralâthat is, between two states or more than two states. 1  For most countries international trade is regulated by unilateral barriers of several types, including tariffs, nontariff barriers, and outright prohibitions.
Test Overview. A urine culture is a test to find and identify germs (usually bacteria) that may be causing a urinary tract infection (UTI) . Urine in the bladder normally is sterileâit does not contain any bacteria or other organisms (such as fungi).But bacteria can enter the urethra and cause an infection.est Overview. A urine culture is a test to find and identify germs (usually bacteria) that may be causing a urinary tract infection (UTI) . Urine in the bladder normally is sterileâit does not contain any bacteria or other organisms (such as fungi). But bacteria can enter the urethra and cause an infection.
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.o 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.