Final answer:
The common symptom expected in patients with acute cystitis, prostatitis, or urethritis is dysuria, characterized by a painful or burning sensation during urination.
Step-by-step explanation:
The symptom that a nurse would expect patients having acute cystitis, prostatitis, or urethritis to have in common is dysuria. Dysuria, which is defined as painful or difficult urination, is a common symptom across these conditions and is often associated with urinary tract infections. This discomfort or pain is typically experienced as a burning sensation during urination and is a result of inflammation in the urinary tract caused by infection or irritation.