Many bacteria are surrounded by a polysaccharide capsule, which both provides the antigens against which antibodies can act, the molecules that largely determine how virulent and pathogenic the organism and protects the main bacterial cell from the bodies defense systems.
helping to improve; promoting further development or advancement (opposed to destructive): constructive criticism. 2. of, relating to, or of the nature of construction; structural. 3. deduced by inference or interpretation; inferential: constructive permission.
In the case of sexual relations, constructive abandonment means a spouse leaves the marriage in spirit by refusal to have sexual relations. Constructive abandonment is a form of abandonment used as a grounds for divorce, and it may also be considered a form of cruel and inhumane treatment.