Infection 0.0 / 5 ? Health & Social CareApplied life science OtherAll boards Created by: Mredmond947Created on: 21-03-24 02:09 What is a microorganism? Any organism too small to be seen by the naked eye. 1 of 20 What is a pathogen? Microorganisms that cause disease. 2 of 20 What is infection? The presence of microorganisms causing damage to body tissues. 3 of 20 Symbiosis Benefits humans and doesn’t harm the microorganism. 4 of 20 Mutualism Benefits humans and microorganisms. 5 of 20 Commensalism Benefits microorganisms and doesn’t harm the human. 6 of 20 Pathogenicity Benefits microorganisms and harms humans 7 of 20 Opportunism A benign microorganism becomes a pathogenic because of decreased human host resistance. 8 of 20 Process of infection Four stages of progression (from point of view of microorganism Colonization Invasion Multiplication Spread 9 of 20 Clinical Infectious Disease Process Four stages (from point of view of the infected individual Incubation period Prodromal stage Invasion period Convalescence 10 of 20 Classes of Infectious Microorganisms Bacterial infection Viral infection Fungal infection Parasitic & protozoal infection 11 of 20 Bacteria prokaryotic (no enclosed nucleus),no mitochondria, or membrane bound organelles 12 of 20 Virus minute particle that is capable of replication but only within living cells. 13 of 20 Transmission one infected individual to an uninfected individual: aerosols of respiratory fluids, contact infected blood, sexual contact 14 of 20 Viral life cycle – completely intercellular 1. Attachment to target cell 2. Penetration 3. Uncoating (release of viral nucleic acid) 4. Replication 5. Assembly (formation new virons) 6. Release 15 of 20 Rapid division produce large numbers of virons more quickly than immune system can develop e.g. short incubation periods of norovirus 16 of 20 Intracellular survival viruses hide within cells & away from normal inflammatory or immune responses 17 of 20 Fungus simple organism that lacks the green pigment chlorophyll 18 of 20 Parasite any living thing that lives in or on another living organism 19 of 20 Protozoa single celled parasitic organisms 20 of 20
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