A 14 year-old female patient presents fatigue, fever, runny…

A 14 year-old female patient presents fatigue, fever, runny nose and a chronic whooping cough for over two weeks. She has history of not having received all vaccines  during childhood. Based on her history, her physician suspects a Bordetella pertussis infection and sends a sputum sample for PCR assay. The results show two bands, one consistent with the internal control and the other consistent with the size expected for amplification of the B. pertussis target. How should these results be interpreted?