E. coli is a gram-negative bacteria, shaped like a rod. Escherichia coli is usually found in the lower intestine of humans and present in fecal matter. Most urinary infections are caused by inadvertent transfer of fecal matter into the urethra. The E.coli present in the fecal matter, and then infect the urinary tract.
Warnings. 1  Always disconnect the negative cable or terminal first when you are working with a car battery. Failure to do so could result in electrical sparks and severe burns. 2  Metal may conduct electricity and cause severe burns.
If the battery is known to be discharged or if the tester tells the operator to charge before testing again, the battery must be completely recharged. 1  It may not be required to turn a conductance tester off or on. 2  Connect the positive (+) tester clamp to the positive (+) battery terminal. 3  Turn on if needed.