Colonization Rate and Associated Factors of Non-Pathogenic Species, and Among Healthy School Children in Gondar, Northwest Ethiopia.

Background: Although commensal species inhabiting mucosal surfaces in the upper respiratory tract (URT) are rarely associated with infections, their presence in the area has been linked to the development of immunity against . and the source of antibiotic resistance determinants in pathogenic species. in the oropharynx of children is also a predisposing factor for otitis media.