Phenomenon of microbial pathogenicity as a function of bio-molecules

The bacterial pathogenicity phenomenon is the poly-functional biological potency of germs that are realized by factors (determinants) of pathogenicity (PF) in multi-cellular organism.  
Biological functions are responsible for bacterial pathogenicity in a multi-cellular host organism: the adhesive function, the function of invasion and penetration into the cell, the function of evasion of host defense, and the damage function. Factors of pathogenicity are representative bio-molecules possessed different functional activity.  The ligand - receptor interaction of bacterial PF and receptors on eukaryotic cells is the basis of specific lesions caused by the pathogen.