قدرة البكتريا Alcaligenes على الالتصاق بسطوح الخلايا الظهارية لتجويف الفم و علاقتها بقابليتها على أحداث التلازن الدموي لكريات الدم الحمر

الملخص EN

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 don’t 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 didn’t 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 0.375 × 108 cells / ml, while this ability disappeared for A.faecalis and the subspecies (A.x.d) at bacterial concentration of more than 1.50 × 108 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.