A comparative study of bacterial Pathogenesis isolated from naso oral cavity for smokers and non smokers in different ages

(116) (67) (49) 1/9/2008- 1/3/2009. (164) (95) (69) Coagulase (-) Staphylococci (17.7%) (14.1%) Moroxella catrrhalis (12.8%) (6.7%) Haemophilus spp Proteus spp. (0.6%) (2.4%) (1.8%) . (76-51) (66.4%) (72) (43.9%) (37) (22.6%) 0.05 P . 0.05 P Coagulase (-) Staphylococci Moroxella catarrhalis (2.92 + 183.8) (3.67 + 110.6) / Streptococcus pneumonia Streptococcus viridans (2.56 + 65.2) (3.12 + 59.6) / .The study included isolation and identification of pathogenic bacteria from oral and nasal cavity of smokers and non- smokers, and study the effect of smoking on the phenotype and ability of adherence of these bacteria on the epithelial cells of oral cavity and study of its pathogenicity. One hundred sixteen naso-oral swab taken from elderly house residence and employers of Mosul university , (67) smokers and (49) non- smokers, of different age groups and both gender during a period from (1/9/2008 1/3/2009). The results showed that (164) bacterial strains were isolated, (95) isolated from smokers and (69) from non- smokers. Results also showed that the highest percentage of these strains are coagulate (-) Staphylococci (17.7%) from smokers and (14.1%)from non smokers, followed by Moroxella catrrhalis (12.8%) in smokers and (6.7%)in non smokers, but the lowest percentage of isolates were Haemophilus spp. and Proteus spp. (0.6%) of smokers and (2.4%), (1.8%) for non- smokers, respectively .The result also showd that the highest percentage (66.4%) of isolates from age group (51-76) years. as (72) isolates (43.9%) from smokers, while (37) strain (22.6%) from non smokers.The study includes ability of these isolates to adherence rate of bacteria on buccal Epithial cells among smokers of both gender, the significant effect at p 0.05 of smoking on this ability. It was also found that the different highest adherence rate was by Coagulase (-) staphylococci (2.92 + 183.8) followed by Moroxella catarrhalis (3.67 + 110.6) bacteria/cell , while the lowest adherence rate found in streptococcus pneumonia (2.56 + 65.2) and Streptococcus viridans (3.12 + 59.6) bacteria/cell.