Infection 0.0 / 5 ? NursingAnatomy and PhysiologyUniversityAll boards Created by: caitlinmetcalfe038Created on: 23-03-22 18:11 Process of infection There are four stages of progression of infection (from point of view of microorganism) 1 of 5 1. Colonization Infectious microorganisms exist in reservoirs e.g. environment (contaminated water, soil), animals, or infected humans. 2 of 5 2. Invasion The infectious agent can invade surrounding tissues. Mechanisms are developed to penetrate tissues & avoid host’s nonspecific and specific defenses. 3 of 5 3. Multiplication Bacteria undergo rapid multiplication – replicate within infected cells (viral pathogens); replicate in macrophages & other cells (bacterial pathogens) 4 of 5 4. Spread If the immune system is comprised then the infection may spread rapidly. 5 of 5
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