Final answer:
The condition characterized by abdominal and back pain with bacteria in the urine indicative of an upper urinary tract infection is pyelonephritis, a serious inflammation of the kidney(s) often resulting from a lower urinary tract infection. The Correct Answer is Option. B.
Step-by-step explanation:
The term used to identify abdominal and back pain with the presence of bacteria in the urine, indicating an upper urinary tract infection, is pyelonephritis.
This condition is characterized by the inflammation of the kidney(s) due to bacterial infection, which often originates from the lower part of the urinary tract or bladder.
Pyelonephritis can lead to severe health issues, including sepsis, and is generally treated with a course of antibiotics.
Cystitis refers to a bladder infection and is not typically associated with kidney involvement or back pain.
However, if left untreated, it can potentially progress to pyelonephritis.