She went back to college to earn a degree in microbiology.
The microbiology laboratory may use samples of the bacteria grown to perform other special techniques to help identify the causative organism.
These are the notes from the proceedings of the Second Symposium on Health-Related Water Microbiology, held last year at the University of Warwick.
Some of the subjects covered presently include butchery, dairy production, food hygiene, food labeling and microbiology.
Charlie Harrington graduated in Microbiology from Glasgow University where he developed an interest in chemical microbiology and the study of microbial cell walls.