An 84 year old woman has worsening confusion

An 84 year old woman has worsening confusion. She has visual hallucinations, disturbed sleep and urinary incontinence for 1 week. She has Alzheimer’s dementia and arthritis and has recently started taking paracetamol.

Her abbreviated mental test score is 2/10.

Which is the most likely underlying reason for her deterioration?

  1. Depression
  2. Encephalitis
  3. Medication related confusion
  4. Progression of dementia
  5. Urinary tract infection

E. Urinary tract infection