A student from Africa tested positive for a tuberculin skin test. After reading the case history, the doctor decided that the test result was a false positive. Why do you think that the physician made this decision?
Urine inside the bladder has always been thought to be sterile. Why is this no longer thought to be so? What bacteria would you be likely to find?

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A student from Africa tested positive for a tuberculin skin test. After reading the case history, the doctor decided that the test result was a false positive. Why do you think that the physician made this decision? Urine inside the bladder has always been thought to be sterile. Why is this no longer thought to be so? What bacteria would you be likely to find?