Which of the following is a symptom of Lyme disease?

Fever and rash are indeed classic symptoms of Lyme disease, which is caused by the bacterium Borrelia burgdorferi, typically transmitted through the bite of infected black-legged ticks. One of the hallmark early signs of Lyme disease is the characteristic "bull's-eye" rash, known as erythema migrans. This rash usually appears at the site of the tick bite and can be accompanied by flu-like symptoms, including fever, chills, fatigue, and muscle aches. Identifying these early symptoms is crucial for timely diagnosis and treatment, which can prevent more severe complications associated with the disease.

The other choices do not represent symptoms associated with Lyme disease. Pneumonia, gastroenteritis, and kidney failure are unrelated conditions that may arise from various other causes but are not typically linked to Lyme disease. Understanding these distinctions can help in recognizing the specific manifestations of Lyme disease and enhancing diagnostic accuracy in clinical settings.