A client with an infected spider bite is receiving IV antibiotics through a central venous catheter. The practical nurse (PN) observes that the client is weak, pale, and diaphoretic. Which additional finding should the PN report immediately to the charge nurse?

A. Red streaks from wound: Could indicate lymphangitis but not immediately life-threatening. B. Urine output 20 mL/hour: Indicates possible septic shock with decreased renal perfusion - urgent finding. C. Purulent wound drainage: Suggests infection but expected in an infected bite; not immediately life-threatening. D. Blood pressure 100/60 mm Hg: Low-normal BP; not yet critical unless accompanied by other shock signs.