30th July 2023

A 34-year-old teacher takes her class to the local farm for a day trip. The next day, she started with episodes of diarrhoea

A 34-year-old teacher takes her class to the local farm for a day trip. The next day, she started with episodes of diarrhoea, which three days later had become blood-stained.

Blood tests were taken, which showed the following (selected results):

• Hb 69 g/L (115-165)
• Platelets 57 x 10⁹/L (150-400
• Creatinine 247 µmol/L (62-116)

What is the most likely causative organism?

Select the SINGLE most appropriate option from the list below. Select ONE option only.