Essay on Study Guide: Microbiology

2964 WordsSep 14, 201212 Pages
Microbiology, Test 3 Study Guide Chapters 14, 15, 16 and 17 Chapter 14 This chapter is about the principles of disease and epidemiology. Epidemiology – the science that studies when and where diseases occur and how they are transmitted. CDC, Atlanta, tracks and traces diseases. ONE World (the idea that it’s all in one place, it could happen anywhere; locally, states, large counties track the incidences and occurrences of disease) Pathology – scientific study of disease. Pathogenesis – the manner in which a disease develops Pathogen – disease causing organism (from worms to prions, viruses, or bacteria) Pathogenicity – the…show more content…
Spanish flu, millions died within a year, healthy young soldiers, not the really young or weak; some consider HIV/AIDS as pandemic Mortality - death rate, # or % of people who have the disease who actually die from it or complications from it. EX: 25% of the people who caught smallpox died from it Morbidity and Mortality tables. Severity or Duration of Disease Acute disease - comes on quickly and goes away quickly. Rapid onset, influenza Chronic disease - develops slowly but lasts a long time; HIV, Hep a/b/c; TB, Leprosy Latent disease – present but undetected for a long time; shingles (varicella virus) or typhoid Herd immunity – a demonstrated % of a population that is immune to a disease, innate or acquired Extent of Infection Local infection – confined to a small area of the body, infected cut, boil, abscess Systemic infection – throughout the body; generalized spread through the lymph nodes or blood; measles Bacteremia – bacteria in the blood
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