BIO 3170 Lecture Notes - Lecture 5: Serratia Marcescens, Adaptive Immune System, Immunity (Medical)
Document Summary
An infection is the successful colonization of a host by a microorganism. Microorganisms that can cause an infectious disease are known as pathogens. Are not normally associated with the host. Can be part of the natural flora. Enterococcus faecium, candida albicans, pseudomonas aeruginosa, serratia marcescens. Immunity is the ability of an organism to resist infection. The non-inducible ability to recognize and destroy an individual pathogen or its products. The acquired ability to recognize and destroy a particular pathogen or its products. In tears and other secretions dissolves bacterial cell walls. Suspend and move micro-organisms out of the body. Physical barriers prevent entry inside the body. The mucous membranes are membranes lining the nose, mouth, lungs, and urinary and digestive. Mucous membranes consist of a layer of epithelial cells bound by tight junctions. Normal microbiota helps host resist pathogens, particularly on the skin and in the gut (competitive exclusion)
