The Ability Of Alcaligenes To Adhere To The Epithelial Cells And Its Relation With The Ability To Agglutinate RBCs .

Alcaligenes ((A.x.x A.faecalis ( (A.x.d . ( (A.x.x A.faecalis ) (A.x.d ( (A.x.x 810 0.375 / 3 A.faecalis ( (A.x.d 0810 1.5 / 3. Alcaligenes . : Alcaligenes .This study deals with the ability of the bacteria 'Alcaligenes' to adhere to the surface of the mouth epithelial cells . The results showed a significant difference in the ability of the subspecies (A.x.x) compared with species A.faecalis and the subspecies (A.x.d) which dont show a significant difference among them.The study also detected the ability of the isolates of (A.x.x) to agglutinate red blood cells of the different human blood groups and rabbit and chicken blood cells. This ability was restricted and accompanied with the high concentration of bacteria . The study didnt record any difference in this ability with the different blood groups, the species A.faecalis and the subspecies (A.x.d) were unable to agglutinate the different groups of RBC while both showed weakly agglutinate rabbit and chicken RBCs which occur high bacterial concentration. The subspecies (A.x.x) were characterized by their ability to agglutinate rabbit RBCs which continued to the bacterial conc. of 0.375108 cells/ml , while this ability disappeared for A.faecalis and the subspecies (A.x.d) at bacterial concentration of more than 1.50108 cells/ml . All the isolates of Alcaligenes under study are unable to lyse blood on blood agar plates prepared from human and rabbit blood . Conclusion: The study showed the ability of the bacteria Alcaligenes to agglutinate the different types of RBCs and it was considered as one of its virulence factors.