Both of these polysaccharides closely resemble carbohydrates found in human tissue polysaccharides and because they are not recognized as foreign by the lymphocytes that carry out the immune responses, antibodies are not made against these capsules . Likewise, some bacteria are able to coat themselves with host proteins such as fibronectin, lactferrin, or transferrin and in this way avoid antibodies. As we also learned in Unit 1, some bacteria by means of the activities described below are able to resist phagocytic destruction . Animation showing a bacterium resisting phagocytosis by escaping from a phagosome. Animation showing a bacterium resisting phagocytosis by blocking the fusion of a lysosome and a phagosome.
Some bacteria are able to kill phagocytes .
The process starts with IgG or IgM being made against epitopes on membranes . However, as learned in Unit 1, some bacteria by means of the activities described below are more resistant to MAC lysis . Without C3 convertase, no MAC is produced. Animation showing neutralization of an exotoxin. For example, Pseudomonas aeruginosa causes severe nosocomial infections, chronic infections in people with cystic fibrosis, and potentially fatal infections in those who are immunocompromised.