BACTERIAL LOAD IN THE HUMAN UPPER RESPIRATORY TRACT

Most of the surfaces of the upper respiratory tract (including nasal and oral passages, nasopharynx, oropharynx, and trachea) are colonized by normal flora. These organisms are usually regular inhabitants of these surfaces and rarely cause disease. Once a respiratory tract pathogen is in the respiratory tract it colonizes the surfaces causing creating so the conditions to cause a disease. Certain microorganisms considered as etiological agent of disease can cause the disease if they are present in a sufficient number on the respiratory tract and they possess virulent factors that are expressed in any host. The most common bacteria in chronic upper respiratory tract, head and neck infections are anaerobic ones. The distribution of the organism according to the seasons has resulted to have a significant connection. From 700 cases, 502 were negative and 198 cases presented bacterial load. The number of cases resulted to be 41 in spring season, 91 in Summer, 36 in the Autumn and 30 in the Winter season. Most microorganisms predominate in summer rather than S.pneumococcus which dominates in the autumn. Source sampling have not resulted organism independent. We noticed that three different sources of different bacteria predominate