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.
conspicuously - in a manner tending to attract attention; there have been plenty of general declarations about willingness to meet and talk, but conspicuously no mention of time and place. inconspicuously - in a manner intended to avoid attracting attention; he had entered the room inconspicuously.