specialized cells are a source of chemicals that destroy disease-causing microbes
gram_negative_cell_wall is bacterial_cell_wall. biological_toxin is toxic_substance. cell_division is biological_destruction. listeria_monocytogenes is bacillus_bacterium. polysaccharide_encapsulated_bacterium is bacterium. bacterial_toxin is biological_toxin. cytokinesis is biological_destruction. microviridae is bacteriophage_virus. listeria_monocytogenes is biochemically_harmful_substance. microbe is microorganism.