<qa>  What is the name of the group that will be collected at the following time points?Subjects scheduled for surgical extractions who give a written consent to be a part of the study will be recruited. An experienced clinical operator with specialist maxillofacial surgery training ML Co-A will be responsible for performing clinical treatment. Prescription of antibiotics will be based on case complexity, difficulty of the operative surgical procedure and time taken. Therefore patients will not be randomized but based on obtaining 10 patients in each group. Three sets of samples Saliva, tongue dorsum scrapings and stool samples will be collected at the following four time points. 