To do only microbiology part and its flow sholud be like this.

1.Introduction to microbiology tests

2. Differential diagnosis ( why using specific tests), microbiology tests ( eg stool culture) (include with tests, results,results interpretation, compare the same tests results in different admissions) and about sample collection, ( transport, process before collect, the actual analysis)
testing procedure, methods, principles and management and treatment in brief must attach results figures, tables,graphs and Harvard referencing.

Attachment:- Case study.rar