By Thomas C. Timmreck
Health and wellbeing Sciences & Professions
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Extra info for An introduction to epidemiology
1 (Continued)5. Completing the clinical picture Identification and diagnostic processes to establish that a condition exists or that a person has a specific disease. , strep throat can cause rheumatic fever. 6. Identification of syndromes Help to establish and set criteria to define syndromes, some examples are: Down, fetal alcohol, sudden death in infants, etc. 7. Determine the causes and sources of disease Epidemiological findings allow for control, prevention, and elimination of the causes of disease, conditions, injury, disability, or death.
The level of immunity, genetic makeup, levels of exposure, state of health, and overall fitness within the host can determine the effect a disease organism can have upon it. The makeup of the host and the organism's ability to accept the new environment can also be a determining factor, as some organisms thrive only under limited, ideal conditions. For example, many infectious disease organisms can exist only in a limited temperature range. The environment is those favorable surroundings and conditions external to the human or animal that cause or allow disease transmission.
The agent is the cause of the disease. Bacteria, virus, parasite, fungus, or mold are various agents found in the cause of infectious diseases. In other disease, conditions, disability, injury, or death situations, the agent may be a chemical such as a solvent, a physical factor such as radiation or heat, a nutritional deficiency, or some other substance, such as rattlesnake poison. One or several agents may contribute to an illness. The host is an organism, usually a human or an animal, that harbors a disease.
An introduction to epidemiology by Thomas C. Timmreck