Alicia Brown is a 24 year old student who has recently returned from travelling across East Africa volunteering in rural villages. Since returning to the UK five days ago, she has developed worsening diarrhoea, crampy abdominal pain and fevers. She has presented today as she has noticed some blood in her stool. She is usually fit and well and has taken appropriate malaria chemoprophylaxis.
Temperature: 37.5 °C
Pulse: 60 bpm
Blood Pressure :133/67 mmHg
Respiratory rate: 16 breaths per minute
Oxygen saturations: 99% on air
Abdominal examination: No abdominal distension, mild tenderness to deep palpation, no masses, bowel sounds normal.
Cardiovascular, respiratory and neurological examinations are unremarkable
What is the next best course of action?