Which condition is listed as a contraindication to ultrasound?

• A. Active tuberculosis
• B. Regular exercise
• C. Mild allergies
• D. High vision acuity

Answer: (A)

Ultrasound therapy has a rule against treating an area with an active infection. Delivering energy to infected tissue can worsen inflammation and, from an infection-control standpoint, raise concerns about spreading pathogens or complicating the infection. Active tuberculosis is an infectious condition, so applying ultrasound in the area would be avoided until the infection is under control and safe to treat. The other options don’t relate to tissue heating or infection risk, so they aren’t contraindications for ultrasound (regular exercise, mild allergies, or high vision acuity don’t indicate a safety issue with this modality).