case study question

PGT Therapeutics Coursework
A 72 year old man presents to his general practice with abdominal cramps and loose stools for 1 week.  He recently had a fall and sustained a laceration.  This became infected and was treated.
How would he initially be assessed? (5)
What are the potential causes? (10)
If it was due to a suspected infective cause what potential management options would be employed? (10)
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1- Doctor asked me to add some probabilities of disease for this case such as cancer and because of clostridium difficile or because of some antibiotics and write them as points
2- please make sure that you write it in the same way and same subtitles of the form that I attached
3- 16 references