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Most are non-infectious, although there are some non-communicable infectious diseases, such as parasitic diseases in which the parasite's life cycle does not include direct host-to-host transmission. The four main NCDs that are the leading causes of death globally are cardiovascular disease , cancer , chronic respiratory diseases , and diabetes .
Robert Hermann Koch (11 December 1843 – 27 May 1910) was a German physician who developed Koch's postulates. [1]Koch's postulates (/ k ɒ x / KOKH) [2] are four criteria designed to establish a causal relationship between a microbe and a disease.
Non-communicable A non-communicable disease is a medical condition or disease that is non-transmissible. [34] Non-communicable diseases cannot be spread directly from one person to another. Heart disease and cancer are examples of non-communicable diseases in humans. [35]
Germ theory's stance that the "germ" was the disease's necessary and sufficient cause—the single factor both required and complete to result in the disease—proved false. [12] Germ theory gradually evolved to include other factors, whereupon germ theory resembled miasmatic theory , which had had to recognize bacteria as a causal factor, and ...
Applied field epidemiology can include investigating communicable and non-communicable disease outbreaks, mortality and morbidity rates, and nutritional status, among other indicators of health, with the purpose of communicating the results to those who can implement appropriate policies or disease control measures.
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Tissue damage resulting from non-infectious means are caused by DAMPs molecules released after injury or cell death has occurred, which are able to stimulate inflammation response. [3] Diseases associated with sterile inflammation include Alzheimer's disease , atherosclerosis , as well as cancer tumor growth due to "immune cell infiltration."
Gamma phage, an example of virus particles (visualised by electron microscopy) Virology is the scientific study of biological viruses.It is a subfield of microbiology that focuses on their detection, structure, classification and evolution, their methods of infection and exploitation of host cells for reproduction, their interaction with host organism physiology and immunity, the diseases they ...